Patent Publication Number: US-2022220732-A1

Title: Mold-in-place concrete formwork

Description:
FIELD 
     The present disclosure relates to a formwork, in particular, to a formwork that is configured to connect with another formwork and effect a sealing engagement therebetween. 
     BACKGROUND 
     A formwork is used during construction, for example, of buildings, and defines an internal space into which concrete, slurry, and similar materials are poured and formed. 
     It may be desirable to connect multiple formworks in an end-to-end configuration to form a concrete slab of a relatively large size without having to manufacture a formwork having such a size. Unfortunately, existing formworks are connected together via sliding engagement. Accordingly, to connect two long formworks, for example, formworks that are 10 feet long, the first formwork would have to first be raised above the second formwork with connecting systems of the first formwork and second formwork aligned, for example. Due to the length of the formworks, raising the first formwork above the second formwork may be cumbersome and costly. For example, a scaffold may have to be constructed and used to raise the first formwork above the second formwork. Then, with the connecting system of the first and second formworks in alignment, the first formwork is lowered such that the connecting system is slidably received in the connecting system of the second formwork to slidingly engage the first formwork and the second formwork. 
     In addition, the connecting systems of the first formwork and the second formwork may not define a sufficient sealing interface therebetween, such that materials poured into the first and second formworks for setting may leak out. 
     Moreover, the bodies of existing formworks may obscure the internal space defined by the bodies of the existing formworks. To inspect the internal space of an existing formwork that has been installed, for example, prior to pouring in slurry into the internal space, an inspector may have to climb a ladder or scaffolding to look downward into the internal space. This may render inspection of the internal space difficult, and visibility of lower portions of the formwork may be reduced or absent, especially if the formwork is long, for example, 10 feet long 
     SUMMARY 
     In one aspect, there is provided a plastic formwork comprising: a slurry-receiving structure wherein: the slurry-receiving structure defines an aperture and a formwork-defined internal space, and; the aperture and the formwork-defined internal space are co-operatively configured such that a slurry is receivable within the formwork-defined internal space via the aperture; a formwork-defined first connection system counterpart, extending from the slurry-receiving structure, and including a sealed interface-effecting portion that is supported by a substrate portion, wherein the material of the sealed interface-effecting portion is softer than the material of the substrate portion; a formwork-defined second connection system counterpart, extending from the slurry-receiving structure, and including a sealed interface-effecting portion that is supported by a substrate portion, wherein the material of the sealed interface-effecting portion is softer than the material of the substrate portion; wherein: the formwork is connectible to another formwork via a first connection system and a second connection system with effect that an obtained aperture and an obtained internal space are obtained, wherein the obtained aperture and the obtained internal space are co-operatively configured such that a slurry is receivable within the obtained internal space via the obtained aperture; the formwork-defined first connection system counterpart is configured for co-operating with a first connection system counterpart of the another formwork, the first connection system including the formwork-defined first connection system counterpart and the first connection system counterpart of the another formwork, such that: (i) the connection to the another formwork via the first connection system includes interlocking engagement between the formwork-defined first connection system counterpart and the first connection system counterpart of the another formwork, and (ii) the interlocking engagement is with effect that a sealing engagement is effected between the sealed interface-effecting portion of the formwork-defined first connection system counterpart and the first connection system counterpart of the another formwork such that a sealed interface is obtained between the formwork-defined first connection system counterpart and the first connection system counterpart of the another formwork; and the formwork-defined second connection system counterpart is configured for co-operating with a second connection system counterpart of the another formwork, the second connection system including the formwork-defined second connection system counterpart and the second connection system counterpart of the another formwork, such that: (i) the connection to the another formwork via the second connection system includes interlocking engagement between the formwork-defined second connection system counterpart and the second connection system counterpart of the another formwork, and (ii) the interlocking engagement is with effect that a sealing engagement is effected between the sealed interface-effecting portion of the formwork-defined second connection system counterpart and the second connection system counterpart of the another formwork such that a sealed interface is obtained between the formwork-defined second connection system counterpart and the second connection system counterpart of the another formwork. 
     In another aspect, there is provided a plastic formwork comprising: a slurry-receiving structure wherein: the slurry-receiving structure defines an aperture and a formwork-defined internal space, and; the aperture and the formwork-defined internal space are co-operatively configured such that a slurry is receivable within the formwork-defined internal space via the aperture; a formwork-defined first connection system counterpart, extending from the slurry-receiving structure, and including a sealed interface-effecting portion that is supported by a substrate portion, wherein the material of the sealed interface-effecting portion is deformable in response to connection of the formwork with another formwork; a formwork-defined second connection system counterpart, extending from the slurry-receiving structure, and including a sealed interface-effecting portion that is supported by a substrate portion, wherein the material of the sealed interface-effecting portion is deformable in response to connection of the formwork with the another formwork; wherein: the formwork is connectible to the another formwork via a first connection system and a second connection system with effect that an obtained aperture and an obtained internal space are obtained, wherein the obtained aperture and the obtained internal space are co-operatively configured such that a slurry is receivable within the obtained internal space via the obtained aperture; the formwork-defined first connection system counterpart is configured for co-operating with a first connection system counterpart of the another formwork, the first connection system including the formwork-defined first connection system counterpart and the first connection system counterpart of the another formwork, such that: (i) the connection to the another formwork via the first connection system includes interlocking engagement between the formwork-defined first connection system counterpart and the first connection system counterpart of the another formwork, and (ii) the interlocking engagement is with effect that a sealing engagement is effected between the sealed interface-effecting portion of the formwork-defined first connection system counterpart and the first connection system counterpart of the another formwork such that a sealed interface is obtained between the formwork-defined first connection system counterpart and the first connection system counterpart of the another formwork; and the formwork-defined second connection system counterpart is configured for co-operating with a second connection system counterpart of the another formwork, the second connection system including the formwork-defined second connection system counterpart and the second connection system counterpart of the another formwork, such that: (i) the connection to the another formwork via the second connection system includes interlocking engagement between the formwork-defined second connection system counterpart and the second connection system counterpart of the another formwork, and (ii) the interlocking engagement is with effect that a sealing engagement is effected between the sealed interface-effecting portion of the formwork-defined second connection system counterpart and the second connection system counterpart of the another formwork such that a sealed interface is obtained between the formwork-defined second connection system counterpart and the second connection system counterpart of the another formwork. 
     In another aspect, there is provided a plastic formwork comprising: a first formwork-defining counterpart and a second formwork-defining counterpart, wherein the first formwork-defining counterpart and the second formwork-defining counterpart are connectible to obtain the formwork, with effect that a slurry-receiving structure is obtained, wherein: the slurry-receiving structure defines an aperture and a formwork-defined internal space, and; the aperture and the formwork-defined internal space are co-operatively configured such that a slurry is receivable within the formwork-defined internal space via the aperture; a formwork-defined first connection system counterpart, extending from the first formwork-defining counterpart, and including a sealed interface-effecting portion that is supported by a substrate portion, wherein the material of the sealed interface-effecting portion is softer than the material of the substrate portion; a formwork-defined second connection system counterpart, extending from the first formwork-defining counterpart, and including a sealed interface-effecting portion that is supported by a substrate portion, wherein the material of the sealed interface-effecting portion is softer than the material of the substrate portion; wherein: the formwork is connectible to another formwork via a first connection system and a second connection system with effect that an obtained aperture and an obtained internal space are obtained, wherein the obtained aperture and the obtained internal space are co-operatively configured such that a slurry is receivable within the obtained internal space via the obtained aperture; the formwork-defined first connection system counterpart is configured for co-operating with a first connection system counterpart of the another formwork, the first connection system including the formwork-defined first connection system counterpart and the first connection system counterpart of the another formwork, such that: (i) the connection to the another formwork via the first connection system includes interlocking engagement between the formwork-defined first connection system counterpart and the first connection system counterpart of the another formwork, and (ii) the interlocking engagement is with effect that a sealing engagement is effected between the sealed interface-effecting portion of the formwork-defined first connection system counterpart and the first connection system counterpart of the another formwork such that a sealed interface is obtained between the formwork-defined first connection system counterpart and the first connection system counterpart of the another formwork; and the formwork-defined second connection system counterpart is configured for co-operating with a second connection system counterpart of the another formwork, the second connection system including the formwork-defined second connection system counterpart and the second connection system counterpart of the another formwork, such that: (i) the connection to the another formwork via the second connection system includes interlocking engagement between the formwork-defined second connection system counterpart and the second connection system counterpart of the another formwork, and (ii) the interlocking engagement is with effect that a sealing engagement is effected between the sealed interface-effecting portion of the formwork-defined second connection system counterpart and the second connection system counterpart of the another formwork such that a sealed interface is obtained between the formwork-defined second connection system counterpart and the second connection system counterpart of the another formwork. 
     Other aspects will be apparent from the description and drawings provided herein. 
    
    
     
       BRIEF DESCRIPTION OF DRAWINGS 
       In the figures, which illustrate example embodiments, 
         FIG. 1  is a top view of an embodiment of a formwork; 
         FIG. 2  is a top view of the formwork of  FIG. 1 , indicating the normal axes of the end walls and side walls; 
         FIG. 3  is a perspective view of a formwork-defined first connection system counterpart of the formwork of  FIG. 1 ; 
         FIG. 4  is a perspective view of a formwork-defined second connection system counterpart of the formwork of  FIG. 1 ; 
         FIG. 5  is a perspective view of a formwork-defined third connection system counterpart of the formwork of  FIG. 1 ; 
         FIG. 6  is a perspective view of a formwork-defined fourth connection system counterpart of the formwork of  FIG. 1 ; 
         FIG. 7  is a top view of a first formwork to be connected to a second formwork; 
         FIG. 8  is a top view of the first formwork connected to the second formwork of  FIG. 7 ; 
         FIG. 9  is a top view of a sealed interface obtained between the formwork-defined first connection system counterpart and the first connection system counterpart of the second formwork; 
         FIG. 10  is a top view of the first formwork connected to a third formwork; 
         FIG. 11  is a top view of the first formwork connected to the third formwork of  FIG. 10 ; 
         FIG. 12  is a top view of an embodiment of a modular formwork; 
         FIG. 13  is a top view of another embodiment of a modular formwork; 
         FIG. 14  is a top view of the formwork of  FIG. 13  interconnecting a second formwork and a third formwork; 
         FIG. 15  is a top view of the formwork of  FIG. 13  interconnecting a plurality of formworks; and 
         FIG. 16  is a perspective view of a first formwork-defining counterpart of the formwork of  FIG. 13  interconnecting a plurality of formworks. 
     
    
    
     DETAILED DESCRIPTION 
     A plastic formwork that is connectible with another formwork with effect that an obtained aperture and an obtained internal space are obtained, and is configured to effect a sealing engagement with the another formwork and obtain a sealed interface between the formwork and the another formwork is disclosed. The formwork includes a formwork-defined first connection system counterpart and a formwork-defined second connection system counterpart. The formwork-defined first connection system counterpart and the formwork-defined second connection system counterpart extend from a slurry-receiving structure, and includes a substrate portion that supports (e.g. is joined to) a sealed interface-effecting portion. The sealed interface-effecting portion is configured to be deformable in response to abutment against another surface to effect a sealing engagement with said another surface, such that a sealed interface is obtained between the sealed interface-effecting portion and the surface against which the sealed interface-effecting portion is abutting. 
     In some embodiments, for example, the material of the sealed interface-effecting portions of the formwork-defined first and second connection system counterparts is different than the material of other portions of the formwork, for example, different than the material of the substrate portion or the material of an interlocking portion of a first connection system counterpart of a second formwork. 
     In some embodiments, the material of the sealed interface-effecting portion of the formwork-defined first connection system counterpart is softer or more deformable than the material of the rest of the formwork, for example, the material of the substrate portion. In some embodiments, the material of the sealed interface-effecting portion of the formwork-defined second connection system counterpart is softer or more deformable than the material of the rest of the formwork, for example, the material of the substrate portion. 
     The formwork is connectible with another formwork, such as a second formwork, via a first connection system and a second connection system, with effect that an obtained aperture and an obtained internal space are obtained. The obtained aperture and the obtained internal space are co-operatively configured such that a material, such as a slurry, concrete, and the like, is receivable within the obtained internal space via the obtained aperture, for example, for setting of the material. 
     The another formwork includes a first connection system counterpart of the another formwork and second connection system counterpart of the another formwork. The first connection system includes the formwork-defined first connection system counterpart and the first connection system counterpart of the another formwork, and the second connection system includes the formwork-defined second connection system counterpart and the second connection system counterpart of the another formwork. 
     The formwork-defined first connection system counterpart is configured for co-operating with the first connection system counterpart of the another formwork, such that: (i) the connection to the another formwork via the first connection system includes interlocking engagement between the formwork-defined first connection system counterpart and the first connection system counterpart of the another formwork, and (ii) the interlocking engagement is with effect that a sealing engagement is effected between the sealed interface-effecting portion of the formwork-defined first connection system counterpart and the first connection system counterpart of the another formwork such that a sealed interface is obtained between the formwork-defined first connection system counterpart and the first connection system counterpart of the another formwork. 
     The formwork-defined second connection system counterpart is configured for co-operating with the second connection system counterpart of the another formwork, such that: (i) the connection to the another formwork via the second connection system includes interlocking engagement between the formwork-defined second connection system counterpart and the second connection system counterpart of the another formwork, and (ii) the interlocking engagement is with effect that a sealing engagement is effected between the sealed interface-effecting portion of the formwork-defined second connection system counterpart and the second connection system counterpart of the another formwork such that a sealed interface is obtained between the formwork-defined second connection system counterpart and the second connection system counterpart of the another formwork. 
     In some embodiments, the sealed interface obtained between the formwork-defined first connection system counterpart and the first connection system counterpart of the another formwork, and the sealed interface obtained between the formwork-defined second connection system counterpart and the second connection system counterpart of the another formwork, are co-operatively configured to resist leakage of material received in the obtained internal space therebetween. 
       FIG. 1  depicts an example formwork  100 . In some embodiments, the formwork  100  is a first formwork  100 . 
     The formwork  100  includes a slurry-receiving structure  103  that defines an aperture  102  and a formwork-defined internal space  104 . The aperture  102  is disposed in fluid communication with the formwork-defined internal space  104 . The aperture  102  and the formwork-defined internal space  104  are co-operatively configured such that a material, such as slurry, concrete, and the like, is receivable within the formwork-defined internal space  104  via the aperture  102 . In some embodiments, the formwork-defined internal space  104  is a channel that extends through the body of the formwork  100 , such that a first aperture  102  is defined on a first side of the formwork  100 , for example, a top side, and a second aperture  102  is defined on a second side of the formwork  100 , for example, a bottom side, with the formwork-defined internal space  104  fluidly communicating the first and second apertures  102 , as depicted in  FIG. 1 . 
     In some embodiments, for example, the formwork-defined internal space  104  is configured to contain the received slurry while the formwork  100  is supported on a planar base. In such embodiments, for example, while the formwork  100  is supported on the planar base, the planar base prevents flow of slurry out of the bottom aperture  102 , such that slurry that is received within the formwork-defined internal space  104  is contained in the formwork-defined internal space  104 . 
     In some embodiments, for example, the formwork  100  has a height of at least 1 foot, for example, 2 feet, for example, 6 feet, for example, 10 feet, for example, 12 feet. 
     In some embodiments, for example, the formwork-defined internal space  104  has a minimum volume of at least 0.005 m 3 , for example, 0.05 m 3 , for example, 0.1 m 3 , for example, 0.2 m 3 , for example, 0.3 m 3 , for example, 0.4 m 3 , for example, 0.5 m 3 . 
     The body of the formwork  100 , the aperture  102 , and the formwork-defined internal space  104  is defined by one or more end walls and side walls of the formwork  100 . In some embodiments, the aperture  102  and the formwork-defined internal space  104  are defined between end walls and side walls of the formwork  100 . 
     As depicted in  FIG. 1 , the formwork  100  includes a first end wall  106  that has an inner surface  108  and an outer surface  110 , a second end wall  112  having an inner surface  114  and an outer surface  116 , a first side wall  118  having an inner surface  120  and an outer surface  122 , and a second side wall  124  having an inner surface  126  and outer surface  128 . As depicted, the first side wall  118  and the second side wall  124  extend between the first end wall  106  and the second end wall  112 . 
     In some embodiments, for example, the end walls and side walls of the formwork  100  define planar inner surfaces and planar outer surfaces. As depicted in  FIG. 1  and  FIG. 2 , the first end wall  106  defines a planar inner surface  108  and a planar outer surface  110 , the second end wall  112  defines a planar inner surface  114  and a planar outer surface  116 , the first side wall  118  defines a planar inner surface  120  and a planar outer surface  122 , and the second side wall  124  defines a planar inner surface  126  and a planar outer surface  128 . In some embodiments, for example, the end walls and side walls of the formwork  100  define inner surfaces and outer surfaces having more than one planar surface, wherein at least one of said planar surfaces is non-parallel relative another one of said planar surfaces. In some embodiments, for example, the end walls and side walls of the formwork  100  define inner surfaces and outer surfaces wherein at least a portion of the inner surface and the outer surface is curved. 
     The first end wall  106 , the second end wall  112 , the first side wall  118 , and the second side wall  124  define the shape of the body of the formwork  100 , the aperture  102 , and the formwork-defined internal space  104 . As depicted, the first side wall  118  and the second side wall  124  are disposed perpendicularly relative to the first end wall  106  and the second end wall  112 , such that the body of the formwork  100 , the aperture  102 , and the formwork-defined internal space  104  has a four-sided shape, such as a square shape or rectangular shape. In some embodiments, the formwork  100  has one or more end walls or side walls, and said end walls or side walls define the shape of the body of the formwork  100 , the aperture  102 , and the formwork-defined internal space  104  to be a round shape or have at least one curved surface (e.g. circle or oval), a two-sided shape, a three-sided shape (e.g. triangular shape), a four-sided shape (e.g. quadrilateral), or a shape having more than four sides (e.g. polygonal shape). 
     In some embodiments, for example, the formwork  100  includes one or more intermediate walls  130 . In some embodiments, for example, the one or more intermediate walls  130  extends between an end wall to another end wall of the formwork  100 , or between a side wall to another side wall of the formwork  100 . As depicted in  FIG. 1 , the formwork  100  includes one intermediate wall  130  that extends between the first side wall  118  and the second side wall  124 . 
     In some embodiments, for example, the intermediate wall  130  divides the aperture  104  and the formwork-defined internal space  104 . As depicted in  FIG. 1 , the first end wall  106 , the second end wall  112 , the first side wall  118 , the second side wall  124 , and the intermediate wall  130  are co-operatively configured to define an aperture  102 A, an aperture  102 B, a formwork-defined internals space  104 A, and a formwork-defined internal space  104 B. As noted herein, the aperture  102 A and the formwork-defined internal space  104 A are co-operatively configured such that a material, such as slurry, concrete, and the like, is receivable within the formwork-defined internal space  104 A via the aperture  102 A. Similarly, the aperture  102 B and the formwork-defined internal space  104 B are co-operatively configured such that a material, such as slurry, concrete, and the like, is receivable within the formwork-defined internal space  104 B via the aperture  102 B. In some embodiments, for example, one or more intermediate walls  130  divide the aperture  102  and/or the formwork-defined internal space  104  into one or more apertures  102  and formwork-defined internal spaces  104 . 
     As depicted in  FIG. 1  and  FIG. 2 , the first end wall  106 , the second end wall  112 , the first side wall  118 , and the second side wall  124  define planar inner surfaces and planar outer surfaces. As depicted, the inner surface  108  of the first end wall  106  defines a normal axis  132 , the outer surface  110  of the first end wall  106  defines a normal axis  134 , the inner surface  114  of the second end wall  112  defines a normal axis  136 , the outer surface  116  of the second end wall  112  defines a normal axis  138 , the inner surface  120  of the first side wall  118  defines a normal axis  140 , the outer surface  122  of the first side wall  118  defines a normal axis  142 , and the inner surface  126  of the second side wall  124  defines a normal axis  144 , the outer surface  128  of the second side wall  124  defines a normal axis  146 . 
     In some embodiments, for example, the normal axes  132  and  134  defined by the first end wall  106  are parallel to the normal axes  136  and  138  defined by the second end wall  112 . 
     In some embodiments, for example, the normal axes  140  and  142  defined by the first side wall  118  are parallel to the normal axes  144  and  146  defined by the second side wall  124 . 
     In some embodiments, for example, the normal axis  132  of the first end wall  106  is perpendicular to the normal axis  140  of the first side wall  118  and perpendicular to the normal axis  144  of the second side wall  124 . In some embodiments, for example, the normal axis  136  of the second end wall  112  is perpendicular to the normal axis  140  of the first side wall  118  and perpendicular to the normal axis  144  of the second side wall  124 . 
     In some embodiments, for example, the normal axis  134  of the first end wall  106  is perpendicular to the normal axis  142  of the first side wall  118  and perpendicular to the normal axis  146  of the second side wall  124 . In some embodiments, for example, the normal axis  138  of the second end wall  112  is perpendicular to the normal axis  142  of the first side wall  118  and perpendicular to the normal axis  146  of the second side wall  124 . 
     In some embodiments, for example, the normal axis  132  of the first end wall  106  is perpendicular to the normal axis  142  of the first side wall  118  and perpendicular to the normal axis  146  of the second side wall  124 . In some embodiments, for example, the normal axis  136  of the second end wall  112  is perpendicular to the normal axis  142  of the first side wall  118  and perpendicular to the normal axis  146  of the second side wall  124 . 
     In some embodiments, for example, the normal axis  134  of the first end wall  106  is perpendicular to the normal axis  140  of the first side wall  118  and perpendicular to the normal axis  144  of the second side wall  124 . In some embodiments, for example, the normal axis  138  of the second end wall  112  is perpendicular to the normal axis  140  of the first side wall  118  and perpendicular to the normal axis  144  of the second side wall  124 . 
     As depicted in  FIG. 2 , the formwork  100  defines a longitudinal axis  101  that extends along the length of the formwork  100 . In some embodiments, for example, the longitudinal axis  101  extends generally parallel to the axes  132 ,  134 ,  136 , and  138 , and extends generally perpendicular to the axes  140 ,  142 ,  144 , and  146 . 
     The formwork  100  includes a formwork-defined connection system counterpart  150 . As depicted in  FIG. 1  and  FIG. 2 , the formwork  100  includes two formwork-defined connection system counterparts  150 , namely, a formwork-defined first connection system counterpart  150 A and a formwork-defined second connection system counterpart  150 B, that are configured such that the formwork  100  is connectible to another formwork, such as a second formwork  200 , via two connection systems, namely, a first connection system  1000  and a second connection system  2000 . In some embodiments, for example, the formwork  100  includes more than two formwork-defined connection system counterparts  150 , wherein the number of formwork-defined connection system counterparts  150  is based on the number of connection systems for connecting the first formwork  100  and the second formwork  200 . 
       FIG. 3  is a perspective view of a formwork-defined first connection system counterpart  150 A, 
     The formwork-defined first connection system counterpart  150 A extends from the slurry-receiving structure  103 . In some embodiments, for example, the formwork-defined first connection system counterpart  150 A extends from an outermost surface of the formwork  100 . In some embodiments, for example, the outermost surface of the formwork  100  is defined by an outer surface of an end wall or a side wall. As depicted in  FIG. 1 ,  FIG. 2 , and  FIG. 3 , in some embodiments, for example, the outermost surface from which the formwork-defined first connection system counterpart  150 A extends is the outer surface  110  of the first end wall  106 . 
     As depicted in  FIG. 3 , in some embodiments, for example, the formwork-defined first connection system counterpart  150 A includes a wall portion  152 . In some embodiments, for example, the extension of the formwork-defined first connection system counterpart  150 A, for example, the interlocking portion  160 , from the slurry-receiving structure  103 , is defined by the extension of the wall portion  152  from the slurry-receiving structure  103 . 
     As depicted in  FIG. 3 , one end of the wall portion  152  is connected to the outer surface  110  of the first end wall  106 . As depicted, in some embodiments, for example, the wall portion  152  is disposed in alignment with the first side wall  118 . In some embodiments, for example, the wall portion  152  is disposed inwardly towards the longitudinal axis  101  on the outer surface  110  relative to the first side wall  118 , such that the wall portion  152  and the first side wall  118  are not disposed in alignment. 
     In some embodiments, for example, as depicted in  FIG. 3 , the wall portion  152  extends perpendicularly from the outer surface  110 . In some embodiments, for example, a normal axis defined by a wall surface of the wall portion  152  is perpendicular to the normal axis  134  defined by the outer surface  110  of the first end wall  106 . 
     In some embodiments, for example, the formwork-defined first connection system counterpart  150 A includes an interlocking portion  160  for effecting interlocking engagement with a first connection system counterpart  270 A of the another formwork, for example, a second formwork  200 . As depicted in  FIG. 3 , the interlocking portion  160  of the formwork defined first connection system counterpart  150 A is connected to the wall portion  152 , and is offset from the outer surface  110 . 
     As depicted in  FIG. 3 , the interlocking portion  160  includes a substrate portion  154 , which defines a recess  156  for receiving an interlocking portion  280  of a connection system counterpart  270 , for example, a first connection system counterpart  270 A, of a second formwork  200 , as depicted in  FIG. 8 , as described in greater detail herein. 
     The formwork-defined first connection system counterpart  150 A includes a sealed interface-effecting portion  158  that is supported by, for example, joined to, the substrate portion  154  and disposed in the recess  156 . As depicted in  FIG. 3 , in some embodiments, for example, the sealed interface-effecting portion  158  has a rounded portion that extends away from the substrate portion  154 . In some embodiments, for example, the sealed interface-effecting portion  158  is a sealing bead. 
     In some embodiments, for example, at least a portion of the sealed interface-effecting portion  158  is configured to be deformable in response to abutment against a surface to effect a sealing engagement with said surface, such that a sealed interface is obtained between the sealed interface-effecting portion  158  and the surface against which the sealed interface-effecting portion  158  is abutting. 
     As described in greater detail herein, while the first formwork  100  and the second formwork  200  are connected, the sealed interface-effecting portion  158  of the formwork-defined first connection system counterpart  150 A is disposed in abutting engagement with an interlocking portion  280  of a first connection system counterpart  270 A, such that a sealed interface  190  is obtained between the formwork-defined first connection system counterpart  150 A of the first formwork  100  and the first connection system counterpart  270 A of the second formwork  200 . The sealed interface  190  obtained between the formwork-defined first connection system counterpart  150 A and the first connection system counterpart  270 A of the another formwork  200  is effected via deformation of the sealed interface-effecting portion  158  of the formwork-defined first connection system counterpart  150 A. 
     In some embodiments, for example, the material of the sealed interface-effecting portion  158  of the formwork-defined first connection system counterpart  150 A is different than the material of the rest of the formwork  100 , for example, the material of the substrate portion  154 . In some embodiments, for example, the material of the sealed interface-effecting portion  158  is softer or more deformable than the material of the substrate portion  154 . 
     In some embodiments, for example, the sealed interface-effecting portion  158  is manufactured with flexible polyvinyl chloride (PVC), and the rest of the formwork  100 , for example, the substrate portion  154 , is manufactured with rigid PVC. 
     In some embodiments, for example, the material of the sealed interface-effecting portion  158  has a first compressive modulus, and the material of the substrate portion  154  has a second compressive modulus that is greater than the first compressive modulus. In some embodiments, for example, the first compressive modulus is at least 0.0005 GPa, for example, 0.01 GPa, for example, 0.5 GPa, for example, 0.9 GPa, for example, 1 GPa, for example, 3 GPa. In some embodiments, for example, the first compressive modulus is between 0.001 GPa and 1.8 GPa. In some embodiments, for example, the second compressive modulus is at least 2 GPa, for example, 2.4 GPa, for example, 4 GPa, for example, 6 GPa. In some embodiments, for example, the second compressive modulus is between 2.4 GPa and 4 GPa. 
     In some embodiments, for example, the material of the sealed interface-effecting portion  158  has a first shore hardness, and the material of the substrate portion  154  has a second shore hardness that is greater than the first shore harness. In some embodiments, for example, the first shore hardness is at least Shore 13D, for example, Shore 30D, for example, Shore 50D, for example, Shore 80D. In some embodiments, for example, the first shore hardness is between Shore 15D and Shore 70D. In some embodiments, for example, the second shore hardness is at least Shore 45D, for example, Shore 60D, for example, Shore 70D, for example, Shore 80D, for example, Shore 90D. In some embodiments, for example, the second shore hardness is between Shore 65D and Shore 90D. 
     In some embodiments, for example, the material of the sealed interface-effecting portion  158  of the formwork-defined first connection system counterpart  150 A is different than the material of the first connection system counterpart  270 A, for example, the interlocking portion  280  of the first connection system counterpart  270 A. In some embodiments, for example, the material of the sealed interface-effecting portion  158  is softer or more deformable than the material of the first connection system counterpart  270 A, for example, the interlocking portion  280  of the first connection system counterpart  270 A. 
     In some embodiments, for example, the sealed interface-effecting portion  158  is manufactured with flexible PVC, and the first connection system counterpart  270 A is manufactured with rigid PVC. 
     In some embodiments, for example, the material of the sealed interface-effecting portion  158  has a first compressive modulus, and the material of the first connection system counterpart  270 A has a second compressive modulus that is greater than the first compressive modulus. In some embodiments, for example, the first compressive modulus is at least 0.0005 GPa, for example, 0.01 GPa, for example, 0.5 GPa, for example, 0.9 GPa, for example, 1 GPa, for example, 3 GPa. In some embodiments, for example, the first compressive modulus is between 0.001 GPa and 1.8 GPa. In some embodiments, for example, the second compressive modulus is at least 2 GPa, for example, 2.4 GPa, for example, 4 GPa, for example, 6 GPa. In some embodiments, for example, the second compressive modulus is between 2.4 GPa and 4 GPa. 
     In some embodiments, for example, the sealed interface-effecting portion  158  has a first shore hardness, and the first connection system counterpart  270 A has a second shore hardness that is greater than the first shore hardness. In some embodiments, for example, the first shore hardness is at least Shore 13D, for example, Shore 30D, for example, Shore 50D, for example, Shore 80D. In some embodiments, for example, the first shore hardness is between Shore 15D and Shore 70D. In some embodiments, for example, the second shore hardness is at least Shore 45D, for example, Shore 60D, for example, Shore 70D, for example, Shore 80D, for example, Shore 90D. In some embodiments, for example, the second shore hardness is between Shore 65D and Shore 90D. 
     The interlocking portion  160  includes an abutment surface  164 . In some embodiments, for example, as depicted in  FIG. 3 , the abutment surface  164  extends from the substrate portion  154 . As described in greater detail herein, the abutment surface  164  of the interlocking portion  160  of the formwork-defined first connection system counterpart  150 A functions to resist separation of the first formwork  100  and the second formwork  200  after the first formwork  100  and the second formwork  200  are connected. 
     In some embodiments, for example, the formwork-defined first connection system counterpart  150 A is resilient, or includes one or more resilient portions, such that it is moveable between: (i) a first position for facilitating engagement of the formwork-defined first connection system counterpart  150 A and the first connection system counterpart  270 A such that one of the first formwork  100  and the second formwork  200  are displaceable towards the other of the first formwork  100  and the second formwork  200  while the formwork-defined first connection system counterpart  150 A and the first connection system counterpart  270 A are engaged, and (ii) a second position for retention of the formwork-defined first connection system counterpart  150 A and the first connection system counterpart  270 A. 
       FIG. 4  is a perspective view of a formwork-defined second connection system counterpart  150 B. 
     The formwork-defined second connection system counterpart  150 B extends from the slurry-receiving structure  103 . In some embodiments, for example, the formwork-defined second connection system counterpart  150 B extends from an outermost surface of the formwork  100 . In some embodiments, for example, the outermost surface of the formwork  100  is defined by an outer surface of an end wall or a side wall. As depicted in  FIG. 1 ,  FIG. 2 , and  FIG. 4 , in some embodiments, for example, the outermost surface from which the formwork-defined second connection system counterpart  150 B extends is the outer surface  110  of the first end wall  106 . 
     As depicted in  FIG. 4 , in some embodiments, for example, the formwork-defined second connection system counterpart  150 B includes a wall portion  152 . In some embodiments, for example, the extension of the formwork-defined second connection system counterpart  150 B, for example, the interlocking portion  160 , from the slurry-receiving structure  103 , is defined by the extension of the wall portion  152  from the slurry-receiving structure  103 . As depicted in  FIG. 1  and  FIG. 2 , the wall portion  152  of the formwork-defined first connection system counterpart  150 A and the formwork-defined second connection system counterpart  150 B are disposed opposite to each other. 
     As depicted in  FIG. 4 , one end of the wall portion  152  is connected to the outer surface  110  of the first end wall  106 . As depicted, in some embodiments, for example, the wall portion  152  is disposed in alignment with the first side wall  118 . In some embodiments, for example, the wall portion  152  is disposed inwardly towards the longitudinal axis  101  on the outer surface  110  relative to the first side wall  118 , such that the wall portion  152  and the first side wall  118  are not disposed in alignment. 
     In some embodiments, for example, as depicted in  FIG. 4 , the wall portion  152  extends perpendicularly from the outer surface  110 . In some embodiments, for example, a normal axis defined by a wall surface of the wall portion  152  is perpendicular to the normal axis  134  defined by the outer surface  110  of the first end wall  106 . 
     In some embodiments, for example, the formwork-defined second connection system counterpart  150 B includes an interlocking portion  160  for effecting interlocking engagement with a second connection system counterpart  270 B of the another formwork, for example, a second formwork  200 . As depicted in  FIG. 4 , the interlocking portion  160  of the formwork-defined second connection system counterpart  150 B is connected to the wall portion  152 , and is offset from the outer surface  110 . 
     As depicted in  FIG. 4 , the interlocking portion  160  includes a substrate portion  154 , which defines a recess  156  for receiving an interlocking portion  280  of a connection system counterpart  270 , for example, a second connection system counterpart  270 B, of a second formwork  200 , as depicted in  FIG. 8 , as described in greater detail herein. 
     The formwork-defined second connection system counterpart  150 B includes a sealed interface-effecting portion  158  that is supported by, for example, joined to, the substrate portion  154  and disposed in the recess  156 . As depicted in  FIG. 4 , in some embodiments, for example, the sealed interface-effecting portion  158  has a rounded portion that extends away from the substrate portion  154 . In some embodiments, for example the sealed interface-effecting portion  158  is a sealing bead. 
     In some embodiments, for example, at least a portion of the sealed interface-effecting portion  158  is configured to be deformable in response to abutment against a surface to effect a sealing engagement with said surface, such that a sealed interface is obtained between the sealed interface-effecting portion  158  and the surface against which the sealed interface-effecting portion  158  is abutting. 
     As described in greater detail herein, while the first formwork  100  and the second formwork  200  are connected, the sealed interface-effecting portion  158  of the formwork-defined second connection system counterpart  150 B is disposed in abutting engagement with an interlocking portion  280  of a second connection system counterpart  270 B, such that a sealed interface  190  is obtained between the formwork-defined second connection system counterpart  150 B of the first formwork  100  and the second connection system counterpart  270 B of the second formwork  200 . The sealed interface  190  obtained between the formwork-defined second connection system counterpart  150 B and the second connection system counterpart  270 B of the another formwork  200  is effected via deformation of the sealed interface-effecting portion  158  of the formwork-defined second connection system counterpart  150 B. 
     In some embodiments, for example, the material of the sealed interface-effecting portion  158  of the formwork-defined second connection system counterpart  150 B is different than the material of the rest of the formwork  100 , for example, the material of the substrate portion  154 . In some embodiments, for example, the material of the sealed interface-effecting portion  158  is softer or more deformable than the material of the substrate portion  154 . 
     In some embodiments, for example, the sealed interface-effecting portion  158  is manufactured with flexible PVC, and the substrate portion  154  is manufactured with rigid PVC. 
     In some embodiments, for example, the material of the sealed interface-effecting portion  158  has a first compressive modulus, and the material of the substrate portion  154  has a second compressive modulus that is greater than the first compressive modulus. In some embodiments, for example, the first compressive modulus is at least 0.0005 GPa—for example, 0.01 GPa, for example, 0.5 GPa, for example, 0.9 GPa, for example, 1 GPa, for example 3 GPa. In some embodiments, for example, the first compressive modulus is between 0.001 GPa and 1.8 GPa. In some embodiments, for example, the second compressive modulus is at least 2 GPa, for example, 2.4 GPa, for example, 4 GPa, for example, 6 GPa. In some embodiments, for example, the second compressive modulus is between 2.4 GPa and 4 GPa. 
     In some embodiments, for example, the material of the sealed interface-effecting portion  158  has a first shore hardness, and the material of the substrate portion  154  has a second shore hardness that is greater than the first shore hardness. In some embodiments, for example, the first shore hardness is at least Shore 13D, for example, Shore 30D, for example, Shore 50D, for example, Shore 80D. In some embodiments, for example, the first shore hardness is between Shore 15D and Shore 70D. In some embodiments, for example, the second shore hardness is at least Shore 45D, for example, Shore 60D, for example, Shore 70D, for example, Shore 80D, for example, Shore 90D. In some embodiments, for example, the second shore hardness is between Shore 65D and Shore 90D. 
     In some embodiments, for example, the material of the sealed interface-effecting portion  158  of the formwork-defined second connection system counterpart  150 B is different than the material of the second connection system counterpart  270 B, for example, the interlocking portion  280  of the second connection system counterpart  270 B. In some embodiments, for example, the material of the sealed interface-effecting portion  158  is softer or more deformable than the material of the second connection system counterpart  270 B, for example, the interlocking portion  280  of the second connection system counterpart  270 B. 
     In some embodiments, for example, the sealed interface-effecting portion  158  is manufactured with flexible PVC, and the second connection system counterpart  270 B is manufactured with rigid PVC. 
     In some embodiments, for example, the material of the sealed interface-effecting portion  158  has a first compressive modulus, and the material of the second connection system counterpart  270 B has a second compressive modulus that is greater than the first compressive modulus. In some embodiments, for example, the first compressive modulus is at least 0.0005 GPa, for example, 0.01 GPa, for example, 0.5 GPa, for example, 0.9 GPa, for example, 1 GPa, for example, 3 GPa. In some embodiments, for example, the first compressive modulus is between 0.001 GPa and 1.8 GPa. In some embodiments, for example, the second compressive modulus is at least 2 GPa, for example, 2.4 GPa, for example, 4 GPa, for example, 6 GPa. In some embodiments, for example, the second compressive modulus is between 2.4 GPa and 4 GPa. 
     In some embodiments, for example, the sealed interface-effecting portion  158  has a first shore hardness, and the second connection system counterpart  270 B has a second shore hardness that is greater than the first shore hardness. In some embodiments, for example, the first shore hardness is at least Shore 13D, for example, Shore 30D, for example, Shore 50D, for example, Shore 80D. In some embodiments, for example, the first shore hardness is between Shore 15D and Shore 70D. In some embodiments, for example, the second shore hardness is at least Shore 45D, for example, Shore 60D, for example, Shore 70D, for example, Shore 80D, for example, Shore 90D. In some embodiments, for example, the second shore hardness is between Shore 65D and Shore 90D. 
     The interlocking portion  160  includes an abutment surface  164 . In some embodiments, for example, as depicted in  FIG. 4 , the abutment surface  164  extends from the substrate portion  154 . As described in greater detail herein, the abutment surface  164  of the interlocking portion  160  of the formwork-defined second connection system counterpart  150 B functions to resist separation of the first formwork  100  and the second formwork  200  after the first formwork  100  and the second formwork  200  are connected. 
     In some embodiments, for example, the formwork-defined second connection system counterpart  150 B is resilient, or includes one or more resilient portions, such that it is moveable between: (i) a first position for facilitating engagement of the formwork-defined second connection system counterpart  150 B and the second connection system counterpart  270 B such that one of the first formwork  100  and the second formwork  200  are displaceable towards the other of the first formwork  100  and the second formwork  200  while the formwork-defined second connection system counterpart  150 B and the second connection system counterpart  270 B are engaged, and (ii) a second position for retention of the formwork-defined second connection system counterpart  150 B and the second connection system counterpart  270 B. 
     In some embodiments, for example, the formwork-defined first connection system counterpart  150 A, the formwork-defined second connection counterpart  150 B, and the end wall from which they extend, such as the first end wall  106 , are co-operatively configured such that, while the first formwork  100  and the second formwork  200  are co-operatively disposed for connection, the formwork-defined first connection system counterpart  150 A and the formwork-defined second connection system counterpart  150 B of the first formwork  100  extend from the end wall  106  such that the formwork-defined first connection system counterpart  150 A and the formwork-defined second connection system counterpart  150 B, for example, the interlocking portions  160 , are aligned with the corresponding first connection system counterpart  270 A and the second connection system counterpart  270 B of the second formwork  200 , for example, the interlocking portions  280 , such that the formwork-defined first connection system counterpart  150 A and the formwork-defined second connection system counterpart  150 B, for example, the interlocking portions  160 , of the first formwork  100  are engageable with the corresponding first connection system counterpart  270 A and the second connection system counterpart  270 B, for example, the interlocking portions  280 , of the second formwork  200 . 
     In some embodiments, for example, the formwork-defined first connection system counterpart  150 A and the formwork-defined second connection system counterpart  150 B extend from a wall of the formwork  100 , such as the first end wall  106 , such that, while the first formwork  100  and the second formwork  200  are co-operatively disposed for connection, the formwork-defined first connection system counterpart  150 A and the formwork-defined second connection system counterpart  150 B, for example, the interlocking portions  160 , are aligned with the corresponding first connection system counterpart  270 A and the second connection system counterpart  270 B,f or example, the interlocking portions  280 , of the second formwork  200 , such that the formwork-defined first connection system counterpart  150 A and the formwork-defined second connection system counterpart  150 B, for example, the interlocking portions  160 , of the first formwork  100  are engageable with the corresponding first connection system counterpart  270 A and the second connection system counterpart  270 B, for example, the interlocking portions  280 , of the second formwork  200 . 
     In some embodiments, for example, the formwork-defined first connection system counterpart  150 A and the formwork-defined second connection system counterpart  150 B extend generally perpendicularly from the first end wall  106 . 
     The formwork  100  includes a formwork-defined connection system counterpart  170 . As depicted in  FIG. 1  and  FIG. 2 , the formwork  100  includes two formwork-defined connection system counterparts  170 , namely, a formwork-defined third connection system counterpart  170 A and a formwork-defined fourth connection system counterpart  170 B, that are configured such that the formwork  100  is connectible to another formwork, such as a third formwork  300 , via two connection systems, namely, a third connection system  3000  and a fourth connection system  4000 . In some embodiments, for example, the formwork  100  includes more than two formwork-defined connection system counterparts  170 , wherein the number of formwork-defined connection system counterparts  170  is based on the number of connection systems for connecting the first formwork  100  and the third formwork  300 . 
       FIG. 5  is a perspective view of a formwork-defined third connection system counterpart  170 A. 
     The formwork-defined third connection system counterpart  170 A extends from the slurry-receiving structure  103 . In some embodiments, for example, the formwork-defined third connection system counterpart  170 A extends from an outermost surface of the formwork  100 . In some embodiments, for example, the outermost surface of the formwork  100  is defined by an outer surface of an end wall or a side wall. As depicted in  FIG. 1 ,  FIG. 2 , and  FIG. 5 , in some embodiments, for example, the outermost surface from which the formwork-defined third connection system counterpart  170 A extends is the outer surface  116  of the second end wall  112 . 
     In some embodiments, for example, the formwork-defined third connection system counterpart  170 A includes an interlocking portion  180  for effecting interlocking engagement with a third connection system counterpart  350 A of the another formwork, for example, a third formwork  300 . As depicted in  FIG. 5 , the interlocking portion  180  of the formwork defined third connection system counterpart  170 A is connected to a substrate portion  172 , and is offset from the outer surface  116 . 
     As depicted in  FIG. 5 , the interlocking portion  180  includes a substrate portion  172 , which defines a recess  174  for receiving an interlocking portion  360  of a connection system counterpart  350 , for example, third connection system counterpart  350 A of a third formwork  300 , as depicted in  FIG. 10 , as described in greater detail herein. 
     In some embodiments, for example, the extension of the formwork-defined third connection system counterpart  170 A, such as the interlocking portion  180 , from the slurry-receiving structure  103 , is defined by the extension of the substrate portion  172  from the slurry-receiving structure  103 . 
     As depicted in  FIG. 5 , one end of the substrate portion  172  is connected to the outer surface  116  of the second end wall  112 . In some embodiments, for example, the substrate portion  172  is disposed in alignment with the first side wall  118 . As depicted, in some embodiments, for example, the substrate portion  172  is disposed inwardly towards the longitudinal axis  101  on the outer surface  116  relative to the first side wall  118 , such that the substrate portion  172  and the first side wall  118  are not disposed in alignment. 
     In some embodiments, for example, as depicted in  FIG. 5 , the substrate portion  172  extends perpendicularly from the outer surface  116 . In some embodiments, for example, a normal axis defined by a wall surface of the substrate portion  172  is perpendicular to the normal axis  138  defined by the outer surface  116  of the second end wall  112 . 
     The interlocking portion  180  includes an abutment surface  184 . In some embodiments, for example, as depicted in  FIG. 5 , the abutment surface  184  extends from the substrate portion  172 . As described in greater detail herein, the abutment surface  184  of the interlocking portion  180  of the formwork-defined third connection system counterpart  170 A functions to resist separation of the first formwork  100  and the third formwork  300  after the first formwork  100  and the third formwork  300  are connected. 
     In some embodiments, for example, the formwork-defined third connection system counterpart  170 A is resilient, or includes one or more resilient portions, such that it is moveable between: (i) a first position for facilitating engagement of the formwork-defined third connection system counterpart  170 A and the third connection system counterpart  350 A such that one of the first formwork  100  and the third formwork  300  are displaceable towards the other of the first formwork  100  and the third formwork  300  while the formwork-defined third connection system counterpart  170 A and the third connection system counterpart  350 A are engaged, and (ii) a second position for retention of the formwork-defined third connection system counterpart  170 A and the third connection system counterpart  350 A. 
       FIG. 6  is a perspective view of a formwork-defined fourth connection system counterpart  170 B. 
     The formwork-defined fourth connection system counterpart  170 B extends from the slurry-receiving structure  103 . In some embodiments, for example, the formwork-defined fourth connection system counterpart  170 B extends from an outermost surface of the formwork  100 . In some embodiments, for example, the outermost surface of the formwork  100  is defined by an outer surface of an end wall or a side wall. As depicted in  FIG. 1 ,  FIG. 2 , and  FIG. 6 , in some embodiments, for example, the outermost surface from which the formwork-defined fourth connection system counterpart  170 B extends is the outer surface  116  of the second end wall  112 . 
     As depicted in  FIG. 1  and  FIG. 2 , the formwork-defined first connection system counterpart  150 A and the formwork-defined second connection system counterpart  150 A extend from a first wall of the formwork  400 , such as the first end wall  106 , and the formwork-defined third connection system counterpart  170 A and the formwork-defined fourth connection system counterpart  170 B extend from a second wall of the formwork  400  that is disposed opposite the first wall of the formwork  400 , for example, the second end wall  112 . 
     In some embodiments, for example, the formwork-defined fourth connection system counterpart  170 B includes an interlocking portion  180  for effecting interlocking engagement with a fourth connection system counterpart  350 B of the another formwork, for example, a third formwork  300 . As depicted in  FIG. 6 , the interlocking portion  180  of the formwork-defined fourth connection system counterpart  170 B is connected to a substrate portion  172 , and is offset from the outer surface  116 . 
     As depicted in  FIG. 6 , the interlocking portion  180  includes a substrate portion  172 , which defines a recess  174  for receiving an interlocking portion  360  of a connection system counterpart  350 , for example, fourth connection system counterpart  350 B of a third formwork  300 , as depicted in  FIG. 10 , as described in greater detail herein. 
     In some embodiments, for example, the extension of the formwork-defined fourth connection system counterpart  170 B, such as the interlocking portion  180 , from the slurry-receiving structure  103 , is defined by the extension of the substrate portion  172  from the slurry-receiving structure  103 . As depicted in  FIG. 1  and  FIG. 2 , the substrate portions  172  of the formwork-defined third connection system counterpart  170 A and the formwork-defined fourth connection system counterpart  170 B are disposed opposite to each other. 
     As depicted in  FIG. 6 , one end of the substrate portion  172  is connected to the outer surface  116  of the second end wall  112 . In some embodiments, for example, the substrate portion  172  is disposed in alignment with the first side wall  118 . As depicted, in some embodiments, for example, the substrate portion  172  is disposed inwardly towards the longitudinal axis  101  on the outer surface  116  relative to the first side wall  118 , such that the substrate portion  172  and the first side wall  118  are not disposed in alignment. 
     In some embodiments, for example, as depicted in  FIG. 6 , the substrate portion  172  extends perpendicularly from the outer surface  116 . In some embodiments, for example, a normal axis defined by a wall surface of the substrate portion  172  is perpendicular to the normal axis  138  defined by the outer surface  116  of the second end wall  112 . 
     The interlocking portion  180  includes an abutment surface  184 . In some embodiments, for example, as depicted in  FIG. 6 , the abutment surface  184  extends from the substrate portion  172 . As described in greater detail herein, the abutment surface  184  of the interlocking portion  180  of the formwork-defined fourth connection system counterpart  170 B functions to resist separation of the first formwork  100  and the third formwork  300  after the first formwork  100  and the third formwork  300  are connected. 
     In some embodiments, for example, the formwork-defined fourth connection system counterpart  170 B is resilient, or includes one or more resilient portions, such that it is moveable between: (i) a first position for facilitating engagement of the formwork-defined fourth connection system counterpart  170 B and the fourth connection system counterpart  350 B such that one of the first formwork  100  and the third formwork  300  are displaceable towards the other of the first formwork  100  and the third formwork  300  while the formwork-defined fourth connection system counterpart  170 B and the fourth connection system counterpart  350 B are engaged, and (ii) a second position for retention of the formwork-defined fourth connection system counterpart  170 B and the fourth connection system counterpart  350 B. 
     In some embodiments, for example, the formwork-defined third connection system counterpart  170 A, the formwork-defined fourth connection system counterpart  170 B, and the end wall from which they extend, such as the second end wall  112 , are co-operatively configured such that, while the first formwork  100  and the third formwork  300  are co-operatively disposed for connection, the formwork-defined third connection system counterpart  170 A and the formwork-defined fourth connection system counterpart  170 B of the first formwork  100  extends from the end wall  112  such that the formwork-defined third connection system counterpart  170 A and the formwork-defined fourth connection system counterpart  170 B, for example, the interlocking portions  180 , are aligned with the corresponding third connection system counterpart  350 A and fourth connection system counterpart  350 B of the third formwork  300 , for example, the interlocking portions  360 , such that the formwork-defined first connection system counterpart  170 A and the formwork-defined fourth connection system counterpart  170 B, for example, the interlocking portions  180 , of the first formwork  100  are engageable with the corresponding third connection system counterpart  350 A and the fourth connection system counterpart  350 B, for example, the interlocking portions  360 , of the third formwork  300 . 
     In some embodiments, for example, the formwork-defined third connection system counterpart  170 A and the formwork-defined fourth connection system counterpart  170 B extend from a wall of the formwork  100 , such as the second end wall  112 , such that, while the first formwork  100  and the third formwork  300  are co-operatively disposed for connection, the formwork-defined third connection system counterpart  170 A and the formwork-defined fourth connection system counterpart  170 B, for example, the interlocking portions  180 , are aligned with the corresponding third connection system counterpart  350 A and fourth connection system counterpart  350 B of the third formwork  300 , for example, the interlocking portions  360 , such that the formwork-defined third connection system counterpart  170 A and the formwork-defined fourth connection system counterpart  170 B, for example, the interlocking portions  180 , of the first formwork  100  are engageable with the corresponding third connection system counterpart  350 A and fourth connection system counterpart  350 B, for example, the interlocking portions  360 , of the third formwork  300 . 
     In some embodiments, for example, the formwork-defined third connection system counterpart  170 A and the formwork-defined fourth connection system counterpart  170 B extend generally perpendicularly from the second end wall  112 . 
     In some embodiments, for example, the formwork-defined first connect system counterpart  150 A and the formwork-defined second connect system counterpart  150 B are disposed on an end wall of the formwork  100 , for example, the first end wall  106 , and the formwork-defined third connection system counterpart  170 A and the formwork-defined fourth connection system counterpart  170 B from an end wall disposed opposite the end wall from which the formwork-defined first connect system counterpart  150 A and the formwork-defined second connect system counterpart  150 B extend, for example, the second end wall  112 , as depicted in  FIG. 1 . 
     In some embodiments, for example, the formwork-defined first connect system counterpart  150 A and the formwork-defined second connect system counterpart  150 B are disposed on an end wall of the formwork  100 , for example, the first end wall  106  or the second end wall  112 , and the formwork-defined third connection system counterpart  170 A and the formwork-defined fourth connection system counterpart  170 B from a wall disposed adjacent the end wall from which the formwork-defined first connect system counterpart  150 A and the formwork-defined second connect system counterpart  150 B extend, for example, the first side wall  118  or the second side wall  124 . 
     In some embodiments, for example, the formwork-defined first connect system counterpart  150 A and the formwork-defined second connect system counterpart  150 B are disposed on a side wall of the formwork  100 , for example, the first side wall  118  or the second side wall  124 , and the formwork-defined third connection system counterpart  170 A and the formwork-defined fourth connection system counterpart  170 B from a wall disposed adjacent the side wall from which the formwork-defined first connect system counterpart  150 A and the formwork-defined second connect system counterpart  150 B extend, for example, the first end wall  106  or the second end wall  112 . 
     In some embodiments, for example, as depicted in  FIG. 7  and  FIG. 8 , a first formwork  100  is connectible with a second formwork  200  via a first connection system  1000  and a second connection system  2000 , with effect that an obtained aperture  186  and an obtained internal space  188  are obtained, wherein the obtained aperture  186  and the obtained internal space  188  are co-operatively configured such that a slurry is receivable within the obtained internal space  188  via the obtained aperture  186 . 
     In some embodiments, for example, the first connection system  1000  includes the formwork-defined first connection system counterpart  150 A and the first connection system counterpart  270 A of the another formwork  200 . 
     In some embodiments, for example, the second connection system  2000  includes the formwork-defined second connection system counterpart  150 B and the second connection system counterpart  270 B of the another formwork  200 . 
     In some embodiments, for example, the first connection system counterpart  270 A and the second connection system counterpart  270 B of the another formwork  200  have the same features as the formwork-defined third connection system counterpart  170 A and the formwork-defined fourth connection system counterpart  170 B. In some embodiments, for example, the first connection system counterpart  270 A and the second connection system counterpart  270 B of the another formwork  200  are identical to the formwork-defined third connection system counterpart  170 A and the formwork-defined fourth connection system counterpart  170 B. 
     In some embodiments, for example, the another formwork  200  includes a slurry-receiving structure  203 , an aperture  202 , formwork-defined internal space  204 , end walls  206 ,  212 , side walls  218 ,  224 , a first connection system counterpart  270 A, a second connection system counterpart  270 B, a substrate portion  272 , a recess  274 , and an interlocking portion  280  having an abutment surface  284 , which correspond to the slurry-receiving structure  103 , the aperture  102 , formwork-defined internal space  104 , end walls  106 ,  112 , side walls  118 ,  124 , the formwork-defined third connection system counterpart  170 A, the formwork-defined fourth connection system counterpart  170 B the substrate portion  172 , the recess  174 , and the interlocking portion  180  having the abutment surface  184 , respectively, as described with respect to the formwork  100 . 
     In some embodiments, for example, the first connection system counterpart  270 A and the second connection system counterpart  270 B of the second formwork  200  is the formwork-defined third connection system counterpart  270 A and the formwork-defined fourth connection system counterpart  270 B of the second formwork  200 . 
     In some embodiments, for example, the formwork  100  and the second formwork  200  are identical. 
     In some embodiments, for example, as depicted in  FIG. 7 ,  FIG. 8 , and  FIG. 9 , the formwork-defined first connection system counterpart  150 A is configured for co-operating with the first connection system counterpart  270 A of the another formwork  200  such that: (i) the connection to the another formwork  200  via the first connection system  1000  includes interlocking engagement between the formwork-defined first connection system counterpart  150 A and the first connection system counterpart  270 A of the another formwork  200 , and (ii) the interlocking engagement is with effect that a sealing engagement is effected between the sealed interface-effecting portion  158  of the formwork-defined first connection system counterpart  150 A and the first connection system counterpart  270 A of the another formwork  200  such that a sealed interface  190  is obtained between the formwork-defined first connection system counterpart  150 A and the first connection system counterpart  270 A of the another formwork  200 . 
     In some embodiments for example, the formwork-defined second connection system counterpart  150 B is configured for co-operating with a second connection system counterpart  270 B of the another formwork  200  such that: (i) the connection to the another formwork  200  via the second connection system  2000  includes interlocking engagement between the formwork-defined second connection system counterpart  150 B and the second connection system counterpart  270 B of the another formwork  200 , and (ii) the interlocking engagement is with effect that a sealing engagement is effected between the sealed interface-effecting portion  158  of the formwork-defined second connection system counterpart  150 B and the second connection system counterpart  270 B of the another formwork  200  such that a sealed interface  190  is obtained between the formwork-defined second connection system counterpart  150 B and the second connection system counterpart  270 B of the another formwork  200 . 
     In some embodiments, for example, the first formwork  100  and the second formwork  200  are connectible via snap-fit engagement. In some embodiments, for example, the interlocking engagement between the formwork-defined first connection system counterpart  150 A and the first connection system counterpart  270 A of the another formwork  200  is effected via snap fit engagement, and the interlocking engagement between the formwork-defined second connection system counterpart  150 B and the second connection system counterpart  270 B of the another formwork  200  is effected via snap-fit engagement. 
     The first formwork  100  and the second formwork  200  are disposed for connection, as depicted in  FIG. 7 , and one of the first formwork  100  and the second formwork  200  is displaced towards the other of the first formwork  100  and the second formwork  200  in order for: 1) the interlocking portions  160  of the formwork-defined first connection system counterpart  150 A and the formwork-defined second connection system counterpart  150 B to be aligned with the recesses  274  of the first connection system counterpart  270 A and second connection system counterpart  270 B of the second formwork, and 2) the interlocking portions  280  of the first connection system counterpart  270 A and second connection system counterpart  270 B of the second counterpart  200  to be aligned with the recesses  156  of the formwork-defined first connection system counterpart  150 A and the formwork-defined second connection system counterpart  150 B. In some embodiments, for example, the first formwork  100  and the second formwork  200  are displaced towards each other. 
     In response to alignment of the interlocking portions  160  of the formwork-defined first connection system counterpart  150 A and the formwork-defined second connection system counterpart  150 B with the recesses  274  of the first connection system counterpart  270 A and second connection system counterpart  270 B of the second formwork, the interlocking portions  160  of the formwork-defined first connection system counterpart  150 A and the formwork-defined second connection system counterpart  150 B are received in, for example, snapped into, the recesses  274  of the first connection system counterpart  270 A and second connection system counterpart  270 B. 
     In response to alignment of the interlocking portions  280  of the first connection system counterpart  270 A and second connection system counterpart  270 B of the second counterpart  200  with the recesses  156  of the formwork-defined first connection system counterpart  150 A and the formwork-defined second connection system counterpart  150 B, the interlocking portions  280  of the first connection system counterpart  270 A and second connection system counterpart  270 B of the second counterpart  200  are received in, for example, snapped into, the recesses  156  of the formwork-defined first connection system counterpart  150 A and the formwork-defined second connection system counterpart  150 B. 
     In some embodiments, for example, the interlocking engagement between the formwork-defined first connection system counterpart  150 A and the first connection system counterpart  270 A of the another formwork  200  is effected via deflection of at least one of the formwork-defined first connection system counterpart  150 A and the first connection system counterpart of the another formwork  270 A, and the interlocking engagement between the formwork-defined second connection system counterpart  150 B and the second connection system counterpart  270 B of the another formwork  200  is effected via deflection of at least one of the formwork-defined second connection system counterpart  150 B and the second connection system counterpart  270 B of the another formwork  200 . 
     While the first formwork  100  and the second formwork  200  are relatively displaced towards each other for connecting the first formwork  100  and the second formwork  200 , at least one of, or both of: 1) the formwork-defined first connection system counterpart  150 A and the formwork-defined second connection system counterpart  150 B, and 2) the first connection system counterpart  270 A and the second connection system counterpart  270 B of the second formwork  200 , are resiliently displaced between the first position and the second Position to allow for: 1) the interlocking portions  160  of the formwork-defined first connection system counterpart  150 A and the formwork-defined second connection system counterpart  150 B to snap into the recesses  274  of the first connection system counterpart  270 A and second connection system counterpart  270 B, and 2) the interlocking portions  280  of the first connection system counterpart  270 A and second connection system counterpart  270 B of the second counterpart  200  to snap into in the recesses  156  of the formwork-defined first connection system counterpart  150 A and the formwork-defined second connection system counterpart  150 B. 
     With respect to the formwork-defined first connection system counterpart  150 A and the formwork-defined second connection system counterpart  150 B, the resilient displacement to the first position includes outward and inward displacement, for example, radially outward and inward displacement, relative to the longitudinal axis  101 . 
     With respect to the first connection system counterpart  270 A and the second connection system counterpart  270 B of the second formwork  200 , the resilient displacement to the first position includes outward and inward displacement, for example, radially inward displacement, relative to the longitudinal axis  101 . 
     At this point, as depicted in  FIG. 8  and  FIG. 9 , the interlocking portions  160  of the formwork-defined first connection system counterpart  150 A and the formwork-defined second connection system counterpart  150 B are received in the recesses  274  of the first connection system counterpart  270 A and second connection system counterpart  270 B of the second formwork  200 , and the interlocking portions  280  of the first connection system counterpart  270 A and second connection system counterpart  270 B of the second counterpart  200  are received in the recesses  156  of the formwork-defined first connection system counterpart  150 A and the formwork-defined second connection system counterpart  150 B, such that the first formwork  100  and the second formwork  200  are connected, for example, via an interlocking engagement between: 1) the formwork-defined first connection system counterpart  150 A and the first connection system counterpart  270 A of the another formwork  200 , and 2) the formwork-defined second connection system counterpart  150 B and the second connection system counterpart of the another formwork  270 B. 
     In some embodiments, for example, as depicted in  FIG. 9 , while the first formwork  100  and the second formwork  200  are connected, the abutment surfaces  162  of the formwork-defined first connection system counterpart  150 A and the formwork-defined second connection system counterpart  150 B are disposed opposite the abutment surfaces  284  of the first connection system counterpart  270 A and second connection system counterpart  270 B. In this regard, the abutment surfaces  162  and the abutment surfaces  284  are co-operatively configured to resist separation of the first formwork  100  and the second formwork  200  after the first formwork  100  and the second formwork  200  are connected. After the first formwork  100  and the second formwork  200  are connected, in response to application of force to the first formwork  100  and/or to the second formwork  200  to separate the first formwork  100  and the second formwork  200 , the abutment surfaces  162  and the abutment surfaces  284  become disposed in abutting engagement with each other, such that separation of the first formwork  100  and the second formwork  200  is resisted. 
     As depicted in  FIG. 8  and  FIG. 9 , the interlocking engagement between the formwork-defined first connection system counterpart  150 A and the first connection system counterpart  270 A of the another formwork  200  is with effect that a sealing engagement is effected between the sealed interface-effecting portion  158  of the formwork-defined first connection system counterpart  150 A and the first connection system counterpart  270 A of the another formwork  200  such that a sealed interface  190  is obtained between the formwork-defined first connection system counterpart  150 A and the first connection system counterpart  270 A of the another formwork  200 , and the interlocking engagement between the formwork-defined second connection system counterpart  150 B and the second connection system counterpart  270 B of the another formwork  200  is with effect that a sealing engagement is effected between the sealed interface-effecting portion  158  of the formwork-defined second connection system counterpart  150 B and the second connection system counterpart  270 B of the another formwork  200  such that a sealed interface  190  is obtained between the formwork-defined second connection system counterpart  150 B and the second connection system counterpart  270 B of the another formwork  200 . 
     In some embodiments, for example, the sealed interface  190  obtained between the formwork-defined first connection system counterpart  150 A and the first connection system counterpart  270 A of the another formwork  200  is effected via deformation of the sealed interface-effecting portion  158  of the formwork-defined first connection system counterpart  150 A, and the sealed interface  190  obtained between the formwork-defined second connection system counterpart  150 B and the second connection system counterpart  270 B of the another formwork  200  is effected via deformation of the sealed interface-effecting portion  158  of the formwork-defined second connection system counterpart  150 B. 
     In particular, as depicted in  FIG. 9 , while the interlocking portions  280  of the first connection system counterpart  270 A and the second connection system counterpart  270 B of the second formwork  200  is received in the recesses  156  of the formwork-defined first connection system counterpart  150 A and the formwork-defined second connection system counterpart  150 B, the interlocking portions  280  are engaged with, for example, abutting against, the sealed interface-effecting portions  158  to obtain the sealed interfaces  190 . While the sealed interface-effecting portions  158  are abutting against the interlocking portions  280 , at least a portion of the sealed interface-effecting portions  158  deform to obtain the sealed interfaces  190 , such that the sealing engagement is defined between the formwork-defined first connection system counterpart  150 A and the formwork-defined second connection system counterpart  150 B and the first connection system counterpart  270 A and the second connection system counterpart  270 B, respectively. 
     With the first formwork  100  and the second formwork  200  connected, the obtained aperture  186  and the obtained internal space  188  are obtained, as depicted in  FIG. 8 . In some embodiments, for example, the obtained aperture  186  and the obtained internal space  188  are defined between the first formwork  100  and the second formwork  200 . In some embodiments, for example, as depicted in  FIG. 8 , the obtained aperture  186  and the obtained internal space  188  are defined between the first end wall  106  of the first formwork  100 , the second end wall  212  of the second formwork  200 , the formwork-defined first connection system counterpart  150 A, the formwork-defined second connection system counterpart  150 B, the first connection system counterpart  270 A, and the second connection system counterpart  270 B. In some embodiments, for example, at least a portion of the obtained aperture  186  and the obtained internal space  188  are defined between the wall portions  152  of the formwork-defined first connection system counterpart  150 A and the formwork-defined second connection system counterpart  150 B. In some embodiments, for example, at least a portion of the obtained aperture  186  and the obtained internal space  188  are defined between the substrate portions  272  of the first connection system counterpart  270 A and the second connection system counterpart  270 B. 
     The obtained aperture  186  is disposed in fluid communication with the obtained internal space  188 . The obtained aperture  186  and the obtained internal space  188  are co-operatively configured such that a material, such as slurry, concrete, and the like, is receivable within the obtained internal space  188  via the obtained aperture  186 . In some embodiments, for example, the obtained internal space  188  is a channel that extends through the body of the connected first formwork  100  and second formwork  200 , such that a first obtained aperture  186  is defined on a first side of the connected formworks, for example, a top side, and a second obtained aperture  186  is defined on a second side of the connected formworks, for example, a bottom side, with the obtained internal space  188  fluidly communicating the first and second obtained apertures  186 , as depicted in  FIG. 8 . 
     In some embodiments, for example, the obtained internal space  188  is configured to contain the received slurry while the connected formworks are supported on a planar base. In such embodiments, for example, while the formwork  100  is supported on the planar base, the planar base prevents flow of slurry out of the bottom obtained aperture  186 , such that slurry that is received within the obtained internal space  188  is contained in the obtained internal space  188 . 
     In some embodiments, for example, the obtained internal space  188  has a minimum volume of at least 0.005 m 3 , for example, 0.05 m 3 , for example, 0.1 m 3 , for example, 0.2 m 3 , for example, 0.3 m 3 , for example, 0.4 m 3 , for example, 0.5 m 3 . 
     In some embodiments, for example, slurry that is received in and contained in the obtained internal space  188  applies an outward force on the surfaces that define the obtained internal space  188 , for example, the outer surface  110  of the first end wall  106  of the first formwork  100 , the outer surface  216  of the second end wall  212  of the second formwork  200 , the formwork-defined first connection system counterpart  150 A and the formwork-defined second connection system counterpart  150 B of the first formwork  100 , in particular, the interlocking portions  160  and the wall portions  152 , the first connection system counterpart  270 A and the second connection system counterpart  270 B of the second formwork  200 , in particular, the substrate portions  272  and the interlocking portions  280 . 
     In some embodiments, for example, the force applied by the slurry contained in the obtained internal space  188  to the outer surface  110  of the first end wall  106  of the first formwork  100  the outer surface  216  of the second end wall  212  of the second formwork  200  urges separation of the first formwork  100  and the second formwork  200 . In some embodiment, for example, the abutment surfaces  162  and the abutment surfaces  284 , which are disposed in opposition while the first formwork  100  and the second formwork  200  are connected, are co-operatively configured to resist separation of the first formwork  100  and the second formwork  200  due to the force applied by the slurry contained in the obtained internal space  188  to the outer surface  110  of the first end wall  106  of the first formwork  100  and the outer surface  216  of the second end wall  212  of the second formwork  200 . 
     In some embodiments, for example, the force applied by the slurry contained in the obtained internal space  188  to the substrate portions  272  or to the interlocking portions  280  of the first connection system counterpart  270 A and the second connection system counterpart  270 B of the second formwork  200  effects, or further effects, the sealing engagement between: 1) the sealed interface-effecting portion  158  of the formwork-defined first connection system counterpart  150 A and the first connection system counterpart  270 A, and 2) the sealed interface-effecting portion  158  of the formwork-defined second connection system counterpart  150 B and the second connection system counterpart  270 B, such that the sealed interfaces  190  are obtained, or further obtained, between: 1) the formwork-defined first connection system counterpart  150 A and the first connection system counterpart  270 A, and  2 ) the formwork-defined second connection system counterpart  150 B and the second connection system counterpart  270 B. 
     In some embodiments, for example, the sealed interface  190  obtained between the formwork-defined first connection system counterpart  150 A and the first connection system counterpart  270 A of the another formwork  200 , and the sealed interface  190  obtained between the formwork-defined second connection system counterpart  150 B and the second connection system counterpart  270 B of the another formwork  200 , are co-operatively configured to resist flow of material or leakage of material received in the obtained internal space  188  between: 1) the formwork-defined first connection system counterpart  150 A and the first connection system counterpart  270 A of the another formwork  200 , and 2) the formwork-defined second connection system counterpart  150 B and the second connection system counterpart  270 B of the another formwork  200 . 
     In some embodiments, for example, as depicted in  FIG. 10  and  FIG. 11 , a first formwork  100  is connectible with a third formwork  300  via a third connection system  3000  and a fourth connection system  4000 , with effect that an obtained aperture  386  and an obtained internal space  388  are obtained, wherein the obtained aperture  386  and the obtained internal space  388  are co-operatively configured such that a slurry is receivable within the obtained internal space  388  via the obtained aperture  386 . 
     In some embodiments, for example, the third connection system  3000  includes the formwork-defined third connection system counterpart  170 A and the third connection system counterpart  350 A of the third formwork  300 . 
     In some embodiments, for example, the fourth connection system  4000  includes the formwork-defined fourth connection system counterpart  170 B and the fourth connection system counterpart  350 B of the third formwork  300 . 
     In some embodiments, for example, the third connection system counterpart  350 A and the fourth connection system counterpart  350 B of the third formwork  300  have the same features as the formwork-defined first connection system counterpart  150 A and the formwork-defined second connection system counterpart  150 B of the first formwork  100 . In some embodiments, for example, the third connection system counterpart  350 A and the fourth connection system counterpart  350 B of the third formwork  300  are identical to the formwork-defined first connection system counterpart  150 A and the formwork-defined second connection system counterpart  150 B of the first formwork  100 . 
     In some embodiments, for example, the third formwork  300  include a slurry-receiving structure  303 , an aperture  302 , formwork-defined internal space  304 , end walls  306 ,  312 , side walls  318 ,  324 , a third connection system counterpart  350 A, a fourth connection system counterpart  350 B, a wall portion  352 , a substrate portion  354 , a recess  356 , a sealed interface-effecting portion  358 , and an interlocking portion  360  having an abutment surface  364 , which corresponds to the slurry-receiving structure  103 , the aperture  102 , formwork-defined internal space  104 , end walls  106 ,  112 , side walls  118 ,  124 , the formwork-defined first connection system counterpart  150 A, the formwork-defined second connection system counterpart  150 B, the wall portion  152 , substrate portion  154 , the recess  156 , the sealed interface-effecting portion  158 , and the interlocking portion  160  having the abutment surface  164 , respectively, as described with respect to the formwork  100 . 
     In some embodiments, for example, the third connection system counterpart  350 A and the fourth connection system counterpart  350 B of the third formwork  300  is the formwork-defined first connection system counterpart  350 A and the formwork-defined second connection system counterpart  350 B of the third formwork  300 . 
     In some embodiments, for example, the first formwork  100  and the third formwork  300  are identical. 
     In some embodiments, for example, the first formwork  100  and the third formwork  300  are connectible via a snap-fit engagement, in a similar manner as described with respect to the connection of the first formwork  100  and the second formwork  200 . The first formwork  100  and the third formwork  300  are connected together via interlocking engagement or snap-fit engagement to obtain the sealed interfaces  390  therebetween and to obtain the obtained aperture  386  and the obtained internal space  388  in the same manner as described herein with respect to connecting the first formwork  100  and the second formwork  200  to obtain the sealed interfaces  190  and to obtain the obtained aperture  186  and the obtained internal space  188 . 
     In some embodiments, for example, as depicted in  FIG. 10  and  FIG. 11 , the formwork-defined third connection system counterpart  170 A is configured for co-operating with the third connection system counterpart  350 A of the third formwork  300 , such that the connection of the first formwork  100  to the third formwork  300  via the third connection system  3000  includes interlocking engagement between the formwork-defined third connection system counterpart  170 A and the third connection system counterpart  350 A of the third formwork  300 . 
     In some embodiments, for example, the formwork-defined fourth connection system counterpart  170 B is configured for co-operating with the fourth connection system counterpart  350 B of the third formwork  300 , such that the connection of the first formwork  100  to the third formwork  300  via the fourth connection system  4000  includes interlocking engagement between the formwork-defined fourth connection system counterpart  170 B and the fourth connection system counterpart  350 B of the third formwork  300 . 
     In some embodiments, for example, the interlocking engagement is with effect that a sealing engagement is effected between the formwork-defined third connection system counterpart  170 A and the third connection system counterpart  350 A of the third formwork  300  such that a sealed interface  390  is obtained between the formwork-defined third connection system counterpart  170 A and the third connection system counterpart  350 A of the third formwork  300 . 
     In some embodiments, for example, the interlocking engagement is with effect that a sealing engagement is effected between the formwork-defined fourth connection system counterpart  170 B and the fourth connection system counterpart  350 B of the third formwork  300  such that a sealed interface  390  is obtained between the formwork-defined fourth connection system counterpart  170 B and the fourth connection system counterpart  350 B of the third formwork  300 . 
     With the first formwork  100  and the third formwork  300  connected, the obtained aperture  386  and the obtained internal space  388  are obtained, as depicted in  FIG. 11 . The obtained aperture  386  and the obtained internal space  388  correspond to the obtained aperture  186  and the obtained internal space  188  obtained in response to connection of the first formwork  100  and the second formwork  200 . 
     In some embodiments, for example, the force applied by slurry contained in the obtained internal space  388  to the substrate portions  172  or to the interlocking portions  180  of the first connection system counterpart  170 A and the second connection system counterpart  170 B of the first formwork  100  effects, or further effects, the sealing engagement between: 1) the sealed interface-effecting portion  358  of the third connection system counterpart  350 A and the formwork-defined third connection system counterpart  170 A, and 2) the sealed interface-effecting portion  358  of the fourth connection system counterpart  350 B and the formwork-defined fourth connection system counterpart  170 B, such that the sealed interface  390  is obtained, or further obtained, between: 1) the third connection system counterpart  350 A and the formwork-defined third connection system counterpart  170 A, and 2) the fourth connection system counterpart  350 B and the formwork-defined fourth connection system counterpart  170 B. 
     In some embodiments, for example, the sealed interface  390  obtained between the formwork-defined third connection system counterpart  170 A and the third connection system counterpart  350 A of the third formwork  300 , and the sealed interface  190  obtained between the formwork-defined fourth connection system counterpart  170 B and the fourth connection system counterpart  350 B of the third formwork  300 , are co-operatively configured to resist flow of material or leakage of material received in the obtained internal space  388  between: 1) the formwork-defined third connection system counterpart  170 A and the third connection system counterpart  350 A of the third formwork  300 , and 2) the formwork-defined fourth connection system counterpart  170 B and the fourth connection system counterpart  350 B of the third formwork  300 . 
     As described herein, the formworks  100 ,  200 , and  300  described herein are of unitary one piece construction. In some embodiments, for example, it is desirable for the formwork to be modular, or to be obtainable via connection of one or more formwork-defining counterparts. 
       FIG. 12  depicts an embodiment of a formwork  400  that is modular. The formwork  400  is similar to the formworks  100 ,  200 , and  300  as described herein, except the formwork  400  is obtainable via connection of a first formwork-defining counterpart  402  and a second formwork-defining counterpart  404 . The first formwork-defining counterpart  402  and the second formwork-defining counterpart  404  are connectible to obtain the formwork  400 , with effect that a slurry-receiving structure  406  is obtained, similar to the slurry-receiving structure  103  as described with respect to the formwork  100 . In some embodiments, for example, the slurry-receiving structure  406  defines an aperture  408  and a formwork-defined internal space  410 , which are similar to the aperture  102  and the formwork-defined internal space  104  as described with respect to the formwork  100 . In some embodiments, for example, the aperture  408  and the formwork-defined internal space  410  are co-operatively configured such that a slurry is receivable within the formwork-defined internal space  410  via the aperture  408 . 
     In some embodiments, for example, the formwork  400  has a height of at least 1 foot, for example, 2 feet, for example, 6 feet, for example, 10 feet, for example, 12 feet. 
     In some embodiments, for example, the formwork-defined internal space  410  has a minimum volume of at least 0.005 m 3 , for example, 0.05 m 3 , for example, 0.1 m 3 , for example, 0.2 m 3 , for example, 0.3 m 3 , for example, 0.4 m 3 , for example, 0.5 m 3 . 
     The formwork  400  includes the formwork-defined first connection system counterpart  150 A and the formwork-defined second connection system counterpart  150 B for connecting and interlockingly engaging with another formwork to effect a sealing engagement therebetween, such as a second formwork  200 , as described with respect to formwork  100 . 
     In some embodiments, for example, the formwork-defined first connection system counterpart  150 A and the formwork-defined second connection system counterpart  150 B are disposed on and extend from the first formwork-defining counterpart  402  of the formwork  400 . As depicted in  FIG. 12 ,  FIG. 13 , and  FIG. 14 , the formwork-defined first connection system counterpart  150 A and the formwork-defined second connection system counterpart  150 B of the formwork  400  are disposed on and extend from the second side wall  124  of the formwork  400 . In some embodiments, for example, the formwork-defined first connection system counterpart  150 A and the formwork-defined second connection system counterpart  150 B of the formwork  400  are disposed on and extend from the second end wall  112 . 
     In some embodiments, for example, the formwork-defined first connection system counterpart  150 A and the formwork-defined second connection system counterpart  150 B are disposed on and extend from the second formwork-defining counterpart  404  of the formwork  400 . In some embodiments, for example, the formwork-defined first connection system counterpart  150 A and the formwork-defined second connection system counterpart  150 B of the formwork  400  are disposed on and extend from the first end wall  106  of the formwork  400 . In some embodiments, for example, the formwork-defined first connection system counterpart  150 A and the formwork-defined second connection system counterpart  150 B of the formwork  400  are disposed on and extend from the first side wall  118 . 
     In some embodiments, for example, the formwork  400  includes the formwork-defined third connection system counterpart  170 A and the formwork-defined fourth connection system counterpart  170 B for connecting and interlockingly engaging with another formwork to effect a sealing engagement therebetween, such as a third formwork  300 , as described with respect to formwork  100 . 
     In some embodiments, for example, the formwork-defined third connection system counterpart  170 A and the formwork-defined fourth connection system counterpart  170 B are disposed on and extend from the first formwork-defining counterpart  402  of the formwork  400 . As depicted in  FIG. 12 ,  FIG. 13 , and  FIG. 14 , the formwork-defined third connection system counterpart  170 A and the formwork-defined fourth connection system counterpart  170 B of the formwork  400  are disposed on and extend from the second end wall  112  of the formwork  400 . In some embodiments, for example, the formwork-defined third connection system counterpart  170 A and the formwork-defined fourth connection system counterpart  170 B of the formwork  400  are disposed on and extend from the second side wall  124 . 
     In some embodiments, for example, the formwork-defined third connection system counterpart  170 A and the formwork-defined fourth connection system counterpart  170 B are disposed on and extend from the second formwork-defining counterpart  404  of the formwork  400 . In some embodiments, for example, the formwork-defined third connection system counterpart  170 A and the formwork-defined fourth connection system counterpart  170 B of the formwork  400  are disposed on and extend from the first end wall  106  of the formwork  400 . In some embodiments, for example, the formwork-defined third connection system counterpart  170 A and the formwork-defined fourth connection system counterpart  170 B of the formwork  400  are disposed on and extend from the first side wall  118 . 
     In some embodiments, for example, as depicted in  FIG. 12 ,  FIG. 13 , and  FIG. 14 , the first formwork-defining counterpart  402  is connectible with the second formwork-defining counterpart  404  via one or more connection systems. As depicted, the first formwork-defining counterpart  402  is connectible with the second formwork-defining counterpart  404  via a first connection system  420  and a second connection system  430 , with effect that the slurry-receiving structure  406  is obtained, wherein the slurry-receiving structure  406  defines the aperture  408  and the formwork-defined internal space  410 , and the aperture  408  and the formwork-defined internal space  410  are co-operatively configured such that a slurry is receivable within the formwork-defined internal space  410  via the aperture  408 . 
     In some embodiments, for example, the first formwork-defining counterpart  402  and the second formwork-defining counterpart  404  are connectible via snap-fit engagement, as described with respect to the connection of the first formwork  100  and the second formwork  200 , or with respect to the first formwork  100  and the third formwork  300 . 
     In some embodiments, for example, the first connection system  420  includes a first connection system counterpart  422  and a second connection system counterpart  424 . 
     In some embodiments, for example, the connection and the interlocking engagement between the first connection system counterpart  422  and the second connection system counterpart  424  of the connection system  420  is effected via snap fit engagement, similar to: (1) the connection and the interlocking engagement between the formwork-defined first connection system counterpart  150 A and the first connection system counterpart  270 A of the another formwork  200 , or (2) the connection and the interlocking engagement between the formwork-defined first connection system counterpart  150 B and the first connection system counterpart  270 B of the another formwork  200 . In some embodiments, for example, at least one of the first connection system counterpart  422  and the second connection system counterpart  424  of the connection system  420  includes a sealed-interface effecting portion that is supported by a substrate portion, as described with respect to the formwork-defined first connection system counterpart  150 A and the formwork-defined second connection system counterpart  150 B, such that a sealing engagement is effectible between the first connection system counterpart  422  and the second connection system counterpart  424  of the connection system  420  such that a sealed interface is obtainable between the first connection system counterpart  422  and the second connection system counterpart  424  of the connection system  420 . 
     In some embodiments, for example, the second connection system  430  includes a first connect system counterpart  432  and a second connection system counterpart  434 . 
     In some embodiments, for example, the connection and the interlocking engagement between the first connection system counterpart  432  and the second connection system counterpart  434  of the connection system  430  is effected via snap fit engagement, similar to: (1) the connection and the interlocking engagement between the formwork-defined first connection system counterpart  150 A and the first connection system counterpart  270 A of the another formwork  200 , or (2) the connection and the interlocking engagement between the formwork-defined first connection system counterpart  150 B and the first connection system counterpart  270 B of the another formwork  200 . In some embodiments, for example, at least one of the first connection system counterpart  432  and the second connection system counterpart  434  of the connection system  430  includes a sealed-interface effecting portion that is supported by a substrate portion, as described with respect to the formwork-defined first connection system counterpart  150 A and the formwork-defined second connection system counterpart  150 B, such that a sealing engagement is effectible between the first connection system counterpart  432  and the second connection system counterpart  434  of the connection system  430  such that a sealed interface is obtainable between the first connection system counterpart  432  and the second connection system counterpart  434  of the connection system  430 . 
     As depicted in  FIG. 12  and  FIG. 13 , the first formwork-defining counterpart  402  includes a cavity-defining surface portion  426 , and the second formwork-defining counterpart  404  includes a cavity-defining surface portion  436 . The cavity-defining surface portion  426  of the first formwork-defining counterpart  402  and the cavity-defining surface portion  436  of the second formwork-defining counterpart  404  are co-operatively configured to define the slurry-receiving structure  406  while the first formwork-defining counterpart  402  and the second formwork-defining counterpart are connected  404 , for example, via the connection system  420  and the connection system  430 . 
     In some embodiments, for example, the formwork  400  includes a supporting rib  401  for providing structural strength to the formwork  400 . As depicted in  FIG. 12 ,  FIG. 13 , and  FIG. 14 , in some embodiments, for example, the second formwork-defining counterpart  404  includes the supporting rib  401 , and extends from the first end wall  106  to the first side wall  118 . In some embodiments, for example, while the first formwork-defining counterpart  402  and the second formwork-defining counterpart  404  are connected to define the formwork  400 , the supporting rib  401  provides structural strength to the formwork  400 . In some embodiments, for example, the supporting rib  401  is configured to resist change in configuration of the second formwork-defining counterpart  404 , for example, configured to resist separation of the first end wall  106  and the first side wall  118 . 
     As depicted in  FIG. 13 , in some embodiments, for example, the first formwork-defining counterpart  402  includes a first counterpart  4022  and a second counterpart  4024 , wherein the first counterpart  4022  and the second counterpart  4024  of the first formwork-defining counterpart  402  are connectible to obtain the first formwork-defining counterpart  402 , such that the cavity-defining surface portion  426  of the first formwork-defining counterpart  402  is obtained. 
     In some embodiments, for example, as depicted in  FIG. 13  and  FIG. 14 , the first counterpart  4022  is connectible with the second counterpart  4024  via one or more connection systems. As depicted, the first counterpart  4022  is connectible with the second counterpart  4024  via a connection system  440 , with effect that the first formwork-defining counterpart  402  is obtained. 
     In some embodiments, for example, the first counterpart  4022  and the second counterpart  4024  are connectible via snap-fit engagement, as described with respect to the connection of the first formwork  100  and the second formwork  200 , or with respect to the first formwork  100  and the third formwork  300 . 
     In some embodiments, for example, the connection system  440  includes a first connection system counterpart  442  and a second connection system counterpart  444 . 
     In some embodiments, for example, the connection and the interlocking engagement between the first connection system counterpart  442  and the second connection system counterpart  444  of the connection system  440  is effected via snap fit engagement, similar to: (1) the connection and the interlocking engagement between the formwork-defined first connection system counterpart  150 A and the first connection system counterpart  270 A of the another formwork  200 , or (2) the connection and the interlocking engagement between the formwork-defined first connection system counterpart  150 B and the first connection system counterpart  270 B of the another formwork  200 . In some embodiments, for example, at least one of the first connection system counterpart  442  and the second connection system counterpart  444  of the connection system  440  includes a sealed-interface effecting portion that is supported by a substrate portion, as described with respect to the formwork-defined first connection system counterpart  150 A and the formwork-defined second connection system counterpart  150 B, such that a sealing engagement is effectible between the first connection system counterpart  442  and the second connection system counterpart  444  of the connection system  440  such that a sealed interface is obtainable between the first connection system counterpart  442  and the second connection system counterpart  444  of the connection system  420 . 
     In some embodiments, for example, the formwork-defined first connection system counterpart  150 A extends from the first counterpart  4022  of the first formwork-defining counterpart  402 , and the formwork-defined second connection system counterpart  150 B extends from the first counterpart  4022  of the first formwork-defining counterpart  402 . 
     In some embodiments, for example, wherein the formwork  400  includes the formwork-defined third connection system counterpart  170 A and the formwork-defined fourth connection system counterpart  170 B, the formwork-defined third connection system counterpart  170 A extends from the second counterpart  4024  of the first formwork-defining counterpart  402 , and the formwork-defined fourth connection system counterpart  170 B extends from the second counterpart  4024  of the first formwork-defining counterpart  402 . 
     As described herein, the formwork  100  is connectible to a second formwork  200  and a third formwork  300 . By connecting a plurality of formworks  100 - 1 ,  100 - 2 ,  100 - 3 , . . . ,  100 - n  together, for example, as described herein with respect to the first formwork  100 , the second formwork  200 , and the third formwork  300 , a sequence of connected formworks  1500  is defined, as depicted in  FIG. 15 , the sequence of formworks extending in a direction  1502 . 
     In some embodiments, for example, it is desirable to change the direction of extension of the sequence of connected formworks  1500 , such as while constructing a corner of a building. 
       FIG. 15  depicts the formwork  400  interconnecting a plurality of formworks and changing the direction of the extension of the sequence of connected formworks  1500 . As depicted, additional formworks  100 - n +1 that are connected to the formwork  400  to extend the sequence of formworks  1500  extends the sequence in a direction  1504  that is different from the direction  1502 . 
     In some embodiments, for example, an angle α defined between a first axis  1510  extending along the direction  1502  and a second axis  1512  extending along the direction  1504  is based on: 1) the relative disposition of the second end wall  112  and the second side wall  124 , and 2) the relative disposition and extension of the formwork-defined first connection system counterpart  150 A and the formwork-defined second connection system counterpart  150 B relative to the second side wall  124 . As depicted in  FIG. 15 , the second end wall  112  and the second side wall  124  are disposed in a perpendicular relationship, with an angle β therebetween having a magnitude of 90°, and the formwork-defined first connection system counterpart  150 A and the formwork-defined second connection system counterpart  150 B extend perpendicularly outwardly from the second side  124 . As depicted, the angle α has a magnitude of 90°. In some embodiments, for example, as the angle β decreases in magnitude while the formwork-defined first connection system counterpart  150 A and the formwork-defined second connection system counterpart  150 B extend perpendicularly outwardly from the second side  124 , the angle α decreases in magnitude. In some embodiments, for example, as the angle β increases in magnitude while the formwork-defined first connection system counterpart  150 A and the formwork-defined second connection system counterpart  150 B extend perpendicularly outwardly from the second side  124 , the angle α increases in magnitude. 
     In some embodiments, for example, as depicted in  FIG. 14  and  FIG. 15 , the plastic formwork  400 , the second formwork  200 , and the third formwork  300  are co-operatively configured such that the plastic formwork  400  and the second formwork  200  are connectible such that at least a first wall portion  1550  is formed, the at least a first wall portion  150  defining a first central longitudinal axis  1552 , the plastic formwork  400  and the third formwork  300  are connectible such that at least a second wall portion  1560  is formed, the at least a second wall portion  1560  defining a second central longitudinal axis  1562 , and the first central longitudinal axis  1552  is disposed in an angled relationship, for example, a perpendicular relationship, relative to the second central longitudinal axis  1562 . 
     In some embodiments, for example, as depicted in  FIG. 14  and  FIG. 15 , the plastic formwork  400 , the second formwork  200 , and the third formwork  300  are co-operatively configured such that the second formwork  200  and the third formwork  300  are interconnectible via the plastic formwork  400 , wherein, while the second formwork  200  and the third formwork  300  are interconnected via the plastic formwork  400 , the second formwork  200  and the third formwork  300  are disposed in an angled relationship, for example, a perpendicular relationship. 
     In some embodiments, for example, as depicted in  FIG. 14  and  FIG. 15 , the formwork  400  is a corner formwork. In some embodiments, for example, the first formwork-defining counterpart  402  defines an inner corner of the corner formwork, and the second formwork-defining counterpart  404  defines an outer corner of the corner formwork. In some embodiments, for example, the first formwork-defining counterpart  402  defines an outer corner of the corner formwork, and the second formwork-defining counterpart  404  defines an inner corner of the corner formwork. 
     The formwork  400 , being modular and obtainable via connection of the first formwork-defining counterpart  402  and the second formwork-defining counterpart  404 , allows for the slurry-receiving structure  406 , such as the aperture  408  and the formwork-defined internal space  410 , and building components therein, to be accessed and inspected with relative ease, prior to completion of installation of the formwork  400 . In some embodiments, for example, the formwork  400  allows for a portion of, a substantial portion of, or the entirety of, the slurry-receiving structure  406 , and components therein, to be exposed or accessible for additional work and inspection. In some embodiments, for example, the slurry-receiving structure  406  is exposed or accessible while the second-formwork-defining counterpart  404  is disconnected to the first formwork-defining counterpart  402 . 
     In operation, to install two wall portions interconnected by a formwork  400  at a corner, the counterpart of the formwork  400  representative of the inner corner, for example, the first formwork-defining counterpart  402 , as depicted in  FIG. 16 , is installed. Then, other formworks, such as formwork  200  and formwork  300 , are connectible with the first formwork-defining counterpart  402 , as described with respect to the connections between the first formwork  100  and the second formwork  200  and between the first formwork  100  and the third formwork  300 , to obtain the first wall portion  1550  and the second wall portion  1560 . 
     At this point, as depicted in  FIG. 16 , the first formwork-defining counterpart  402 , the first wall portion  1550 , and the second wall portion  1560  are installed, but the counterpart of the formwork  400  representative of the outer formwork, for example, the second formwork-defining counterpart  404 , is not yet connected to the first formwork-defining counterpart  402 . Accordingly, the slurry-receiving structure  406 , such as the aperture  408  and the formwork-defined internal space  410 , and building components therein, may be accessed to complete additional work, or may be inspected, prior to completion of installation of the formwork  400  by connecting the second formwork-defining counterpart  404  to the first formwork-defining counterpart  402 . 
     As depicted in  FIG. 16 , in some embodiments, for example, at least a portion of horizontal rebars  1602  extending through the wall portion  1550  and the wall portion  1560 , and a vertical rebar  1604 , are received in the formwork-defined internal space  410 , with the horizontal rebars  1602  connected to, for example, hooked to, the vertical rebar  1604 . As depicted in  FIG. 16 , in some embodiments, for example, the formworks  100 ,  200 ,  300 , and  400  include one or more coring or apertures  450  defined on one or more walls of the formworks, for example, the first end wall  106  and the second end wall  112  of the formworks, such that the horizontal rebar  1602  is extendible through the formworks. Accordingly, prior to connection of the second formwork-defining counterpart  404  to the first formwork-defining counterpart  402 , the slurry-receiving structure  406  is exposed and accessible, such that additional work may be completed, or inspection may be completed, for example, inspection of the horizontal rebars  1602 , the vertical rebar  1604 , and the connection between the horizontal rebars  1602  and the vertical rebar  1604 . 
     After the additional work is completed or after the inspection is completed, the second formwork-defining counterpart  404  is connected to the first formwork-defining counterpart  402 , for example, with the connecting system  440 , such that the formwork  400  is obtained. With the formwork  400  obtained, in some embodiments, for example, two wall portions interconnected by a formwork  400  at a corner is installed. In some embodiments, for example, the formwork  400  is braced, for example, with lumber or metal, before slurry is poured into the slurry-receiving structure  406  of the formwork  400 . 
     In some embodiments, for example, the formworks  100 ,  200 ,  300 , and  400  are manufactured with one or more types of plastic, for example, rigid polyvinyl chloride, flexible polyvinyl chloride, or a combination thereof. 
     In some embodiments, for example, the formworks  100 ,  200 ,  300 , and  400  are manufactured by extrusion, for example, cold extrusion. 
     The formwork  100  includes the formwork-defined first connection system counterpart  150 A and the formwork-defined second connection system counterpart  150 B that are configured to engage with the first connection system counterpart  270 A and the second connection system counterpart  270 B of the second formwork  200 , wherein the first connection system counterpart  270 A and the second connection system counterpart  270 B of the second formwork  200  has the same features and are identical to the formwork-defined third connection system counterpart  170 A and the formwork-defined fourth connection system counterpart  170 B of the first formwork  100 . As described herein and depicted in  FIG. 1 , the formwork-defined third connection system counterpart  170 A and the formwork-defined fourth connection system counterpart  170 B of the first formwork  100  are disposed on the second end wall  112  that is opposite the first end wall  106 , on which the formwork-defined first connection system counterpart  150 A and the formwork-defined second connection system counterpart  150 B. Such a disposition of the formwork-defined first connection system counterpart  150 A and the formwork-defined second connection system counterpart  150 B and the formwork-defined third connection system counterpart  170 A and the formwork-defined fourth connection system counterpart  170 B on the formwork  100  allows for a sequence of connected formworks or a wall portion of formworks extending along one direction to be defined by a plurality of formworks  100 , without the need for another formwork. As such, only one design of formwork, namely the formwork  100 , may be manufactured to assemble the sequence of connected formworks or a wall portion of formworks extending along one direction, which may reduce the manufacturing cost of the sequence of connected formworks. 
     The preceding discussion provides many example embodiments. Although each embodiment represents a single combination of inventive elements, other examples may include all suitable combinations of the disclosed elements. Thus if one embodiment comprises elements A, B, and C, and a second embodiment comprises elements B and D, other remaining combinations of A, B, C, or D, may also be used. 
     The term “connected” or “coupled to” may include both direct coupling (in which two elements that are coupled to each other contact each other) and indirect coupling (in which at least one additional element is located between the two elements). 
     Although the embodiments have been described in detail, it should be understood that various changes, substitutions and alterations could be made herein. 
     Moreover, the scope of the present application is not intended to be limited to the particular embodiments of the process, machine, manufacture, and composition of matter, means, methods and steps described in the specification. As one of ordinary skill in the art will readily appreciate from the disclosure of the present invention, processes, machines, manufacture, compositions of matter, means, methods, or steps, presently existing or later to be developed, that perform substantially the same function or achieve substantially the same result as the corresponding embodiments described herein may be utilized. Accordingly, the appended claims are intended to include within their scope such processes, machines, manufacture, compositions of matter, means, methods, or steps. 
     As can be understood, the examples described above and illustrated are intended to be examples only. The invention is defined by the appended claims.