Patent Publication Number: US-2023151557-A1

Title: Support product

Description:
CROSS-REFERENCE TO RELATED APPLICATION 
     This application claims priority to Australian Patent Application Nos. 2021221537, filed Aug. 24, 2021; 2021902684, filed Aug. 24, 2021; and 2022221468, filed Aug. 24, 2022; and to New Zealand Patent Application No. 779387, filed Aug. 24, 2021, all of which are incorporated herein by reference in their entireties. 
     TECHNICAL FIELD 
     The present disclosure relates to a support product. 
     More particularly, the present disclosure relates to a support product used in construction of composite concrete trafficable pavements. 
     BACKGROUND 
     Traditionally, pavements are constructed as either flexible pavement or rigid pavements, each type of construction having specific benefits and drawbacks. 
     Pavements as described herein include any trafficable substance laid down on an area intended to sustain vehicular or foot traffic. For example, but not limited to, footpaths, cycle paths, roads, rail track beds, parking lots and runways. 
     Flexible pavements consist of a sub-base course laid onto subgrade or existing native material, a base course laid on top of the sub-base, and a bituminous surface course laid on the base course. 
     The surface course consists of one or more bituminous or hot mix asphalt (HMA) layers. 
     The structural capability of the flexible pavement is determined by the combination of the different layers, and the surface course alone has negligible structural integrity, as the load is distributed into the subjacent layers. 
     Although by volume the materials required to construct flexible pavements are relatively cheap, the nature of the construction means that, especially in roads requiring high loads, the depth and material volume required is significant, with highways requiring over a metre of additional material to be provided on top of the sub-grade. 
     Therefore, the cost of construction of flexible pavements, especially those experiencing high loads, is significant. 
     Similarly, the logistical requirements of getting the required volume of materials to remote locations is also problematic. 
     Damage to flexible pavements is also common, as the surface course does not have significant structural integrity, and holes can be caused by impacts such as rocks being forced into the surface by traffic loads. 
     As vehicles pass across the surface course of a flexible pavement, the friction from the tires causes it to expand. Over time, this can lead to surface cracks, allowing water to gradually erode the surface course from underneath, causing larger cracks and pot holes to form. 
     Where cavities or voids appear in either the base course or sub-base, which may result from a pothole or other defects, repair of the flexible pavement is difficult and costly, as the entire section of pavement must be excavated and re-laid. 
     The flexible pavement is also affected by extreme temperatures which cause the surface to become tacky which leads to further deterioration. 
     Rigid pavements, on the other hand, include a surface course, typically in the form of a concrete slab, poured above a base course and possibly a sub-base laid upon the subgrade. 
     The rigidity provided by the concrete slab allows the load to be distributed more evenly, potentially allowing for fewer, or shallower, subjacent courses. 
     Concrete is adversely affected by temperature changes, and expansion and associated cracking must be mitigated by having a number of separate slabs, with adjacent slabs tied together with steel dowels or ties bars or example. 
     Concrete is also very expensive by volume, and although the construction of a rigid pavement requires less depth than a flexible pavement, the cost of construction is greater by area, primarily due to the concrete required. 
     Additionally, the logistic of providing concrete to remote locations is significant, and as such, rigid pavements are simply not an option for many remote applications. 
     Cracking of concrete is common due to high loads, especially towards edges of slabs where the supporting base course may be more susceptible to movement. 
     Repair of concrete slabs is also more difficult than flexible pavements, as a cracked concrete slab must be cut out and new concrete poured in place, rather than simply filling a small hole with bituminous or HMA product. 
     In addition, where cavities or subsidence appears in either the base course or sub-base, repair of the rigid pavement is difficult and costly, as the entire section of pavement must be excavated and re-laid. 
     Consideration of cost alone allows a determination to be made on the cheapest option for type of pavement, with soil CBR (California Bearing Ratio) and traffic load in MSA (Million Standard Axles) being contributing factors. 
     However, rigid pavements require significantly higher CO 2  emissions, with the total emissions during construction being 5 to 6 times higher than flexible pavements, largely due to the concrete volumes. 
     In summary, known methods of construction of pavements are costly, requiring large material volumes and CO 2  emissions, and are difficult to repair. 
     It is to be understood that, if any prior art publication is referred to herein, such reference does not constitute an admission that the publication forms a part of the common general knowledge in the art, in Australia or any other country. 
     SUMMARY 
     In some embodiments, there is provided a support product. The support product may comprise a plurality of walls. At least some of the plurality of walls may define cells. The plurality of walls may comprise: an edge wall defining an edge plane that is parallel to the edge wall; and a plurality of partial keyway walls defining a partial keyway. The plurality of partial keyway walls may comprise: a pair of offset partial keyway walls that extend parallel to a first direction that is transverse to the edge plane; and a transverse partial keyway wall extending from one of the pair of offset partial keyway walls to the other of the pair of offset partial keyway walls. 
     In some embodiments, the pair of offset partial keyway walls comprises: a first partial keyway wall, the first partial keyway wall extending from a first junction to a second junction, the first junction being a junction between the first partial keyway wall and the edge wall and the second junction being a junction between the first partial keyway wall and the transverse partial keyway wall; and a second partial keyway wall, the second partial keyway wall extending from a third junction to a wall end portion, the third junction being a junction between the transverse partial keyway wall and the second partial keyway wall. 
     In some embodiments, a keyway opening is defined between the first junction and the wall end portion. 
     In some embodiments, the first partial keyway wall and the edge wall define an acute angle therebetween. 
     In some embodiments, the first partial keyway wall and the transverse partial keyway wall define an acute angle therebetween. 
     In some embodiments, the transverse partial keyway wall and the second partial keyway wall define an obtuse angle therebetween. 
     In some embodiments, the second partial keyway wall is longer than the first partial keyway wall. 
     In some embodiments, there is provided a support product. The support product may comprise: a plurality of walls defining cells; and a partial keyway that is configured to receive part of a key. The partial keyway may extend inwardly from an edge of the support product. The partial keyway may be configured to inhibit outward motion of the key when the part of the key is within the partial keyway. 
     In some embodiments, the partial keyway is defined by a plurality of partial keyway walls. 
     In some embodiments, there is provided a support product. The support product may comprise: a plurality of cells; and a plurality of partial keyway walls defining a partial keyway. The support product may be configured to be aligned with a second support product such that the partial keyway and a second partial keyway of the second support product form a keyway configured to receive a key. In use, the partial keyway walls may be configured to cooperate with the key to inhibit relative movement of the support product and the second support product. 
     In some embodiments, the partial keyway extends inwardly from an edge of the support product. 
     In some embodiments, there is provided a support product. The support product may comprise: a plurality of walls at least partially defining a cell structure that comprises a plurality of cells, the cell structure being repeated throughout at least part of the support product. Each wall of the plurality of walls may meet another wall of the plurality of walls at a junction. A perimeter profile of the cell structure may be determined by connecting the junctions with straight lines forms an asymmetric polygon. 
     In some embodiments, each instance of the cell structure shares at least one wall in common with another instance of the cell structure. 
     In some embodiments, one or more of the cells of the cell structure is a quadrilateral. 
     In some embodiments, one or more of the cells of the cell structure is symmetrical. 
     In some embodiments, one or more of the cells of the cell structure is regular. 
     In some embodiments, the cell structure comprises: a first group of cells that comprises a first axis of symmetry; and a second group of cells that comprises a second axis of symmetry. 
     In some embodiments, the first group of cells is symmetric with respect to the second group of cells about a third axis of symmetry. 
     In some embodiments, the plurality of cells comprises a first cell of a first shape, the first shape being defined, at least in part, by a first subset the plurality of walls. 
     In some embodiments, the plurality of cells comprises a second cell of a second shape, the second shape being defined, at least in part, by a second subset the plurality of walls, the second subset comprising at least one wall of the first subset. 
     In some embodiments, the first group of cells comprises the first cell and the second cell. 
     In some embodiments, the first cell and the second cell share a wall of the plurality of walls. 
     In some embodiments, the first axis of symmetry extends along at least part of the shared wall. 
     In some embodiments, the plurality of cells comprises a third cell of a third shape, the third shape being defined by a third subset of the plurality of walls, the third subset comprising at least one wall from the first subset and at least one wall from the second subset. 
     In some embodiments, the plurality of cells comprises a fourth cell of a fourth shape, the fourth shape being defined, at least in part, by a fourth subset the plurality of walls. 
     In some embodiments, the plurality of cells comprises a fifth cell of a fifth shape, the fifth shape being defined, at least in part, by a fifth subset the plurality of walls, the fifth subset comprising at least one wall of the fourth subset. 
     In some embodiments, the plurality of cells comprises a sixth cell of a sixth shape, the sixth shape being defined, at least in part, by a sixth subset of the plurality of walls, the sixth subset comprising at least one wall of the fifth subset. 
     In some embodiments, the second group of cells comprises the fourth cell and the fifth cell. 
     In some embodiments, the fourth cell and the fifth cell share a wall of the plurality of walls. 
     In some embodiments, the second axis of symmetry extends along at least part of the shared wall. 
     In some embodiments, the third axis of symmetry bisects the third cell. 
     In some embodiments, the support product further comprises a partial keyway that is configured to receive part of a key. The partial keyway may extend inwardly from an edge of the support product. The partial keyway may be configured to inhibit outward motion of the key when the part of the key is within the keyway. 
     In some embodiments, the partial keyway is defined by a plurality of partial keyway walls. 
     In some embodiments, the cells are configured to receive a fill material. 
     In some embodiments, the partial keyway defines a re-entrant corner of the support product. 
     In some embodiments, the support product further comprises a male catch that projects outwardly. The male catch may comprise: an outer catch portion of a first width; and an inner catch portion of a second width. The first width may be greater than the second width. 
     In some embodiments, the male catch projects outwardly from one of the minor faces. 
     In some embodiments, the support product further comprises a female catch in the form of a groove in one of the walls of the plurality of walls. 
     In some embodiments, the support product comprises opposed major faces comprising a first major face and a second major face. 
     In some embodiments, the support product comprises a plurality of edge regions. 
     In some embodiments, each edge region comprises a respective minor face of the support product. 
     In some embodiments, one of the edge regions comprises the partial keyway. 
     In some embodiments, the support product comprises a plurality of male catches and a plurality of female catches. The plurality of male catches may project outwardly from one or more walls of one of the edge regions. The plurality of female catches may be located on one or more walls of an edge region that is adjacent to the edge region from which the plurality of male catches project outwardly. 
     In some embodiments, the support product is rectangular and comprises four edge regions. 
     In some embodiments, the edge region that comprises the partial keyway also comprises the edge wall. 
     In some embodiments, one or more of the plurality of walls extends at least partially between the first major face and second major face. 
     In some embodiments, one or more of the plurality of walls extends from the first major face to the second major face. 
     In some embodiments, one or more of the cells extends at least partially between the first major face and the second major face. 
     In some embodiments, one or more of the cells extends from the first major face to the second major face. 
     In some embodiments, the support product comprises: a plurality of partial keyways that comprises the partial keyway; and one or more additional partial keyways. 
     In some embodiments, each edge region comprises at least one partial keyway of the plurality of partial keyways. 
     In some embodiments, the support product further comprises an access cell that is configured to enable access beneath the support product. 
     In some embodiments, a junction between a number of the walls of the plurality of walls comprises the access cell. 
     In some embodiments, a cross-sectional profile of the access cell is circular. 
     In some embodiments, the access cell comprises inwardly projecting projections. 
     In some embodiments, one or more of the plurality of walls has a height that is between 20 mm and 100 mm. 
     In some embodiments, one or more of the plurality of walls is thicker at a lower portion than at a higher portion. 
     In some embodiments, the support product further comprises a planar portion. The planar portion may extend generally parallel to the axes of a reference plane. The planar portion may comprise one or more channels extending from one face of the planar portion and an opposing face of the planar portion. The one or more channels may be aligned with one or more respective cells of the support product, providing a hole therethrough. 
     In some embodiments, the support product comprises a polymer. 
     In some embodiments, there is provided a pavement course comprising the support product. 
     In some embodiments, the pavement course further comprises the fill material. The cells may contain the fill material. The fill material may comprise one or more of: a cementitious material; a bituminous material; and a granular fill material. 
     In some embodiments, there is provided a path comprising the support product. 
     In some embodiments, the path may further comprise the fill material. The cells may contain the fill material. The fill material may comprise one or more of: a cementitious material; a bituminous material; and a granular fill material. 
     In accordance with one aspect of the present disclosure, there is provided a support product configured to receive poured concrete, the support product comprising a latticework of walls and a plurality of edges, wherein the walls extend between a lower surface and an upper surface and define a plurality of cells, wherein at least one edge comprises a catch and a partial keyway, wherein the catch is configured to connect with a catch of an adjacent support product to restrain relative movement of connected support products, and wherein the partial keyway is configured to be located adjacent to a partial keyway of a connected support product, so that adjacent partial keyways define a complete keyway between connected support products. 
     In some embodiments, the support product is constructed of polymer. 
     In some embodiments, the support product is rectangular and comprises four edges. 
     In some embodiments, each edge comprises at least one catch and at least one partial keyway, wherein partial keyways of opposed edges are symmetrical. 
     In some embodiments, each edge comprises at least two partial keyways. 
     In some embodiments, each edge comprises at least four partial keyways. 
     In some embodiments, each edge comprises at least two catches. 
     In some embodiments, each edge comprises at least four catches. 
     In some embodiments, each catch is either a first part or a second part. 
     In some embodiments, the first part is a male pin and the second part is a female slot. 
     In some embodiments, the first part is an over hook and the second part is an under hook. 
     In some embodiments, a pair of adjacent edges of the support product comprises catches having a first part, and an opposed pair of adjacent edges of the support product comprises catches having a second part, to facilitate assembly of a large number of support products. 
     In some embodiments, each catch is comprised of a slot, and support products are connected using an intermediary connector. 
     In some embodiments, the intermediary connector is cotton reel shaped, having wider ends and a narrower mid-portion. 
     In some embodiments, partial keyways of adjacent support products define a complete keyway having a shape configured to prevent separation of adjacent support products. 
     In some embodiments, partial keyways of adjacent support products define a complete keyway having a chevron shaped section. 
     In some embodiments, the support product is symmetrical about both a horizontal centreline and a vertical centreline. 
     In some embodiments, the support product further comprises a cylindrical access cell, to facilitate access below the support product. 
     In some embodiments, the cylindrical access cell comprises protrusions into the cell to retain the hardened concrete cylinder and prevent it from being accidentally ejected. 
     In some embodiments, the latticework of walls is between 20 mm and 100 mm high. 
     In some embodiments, the latticework of walls is between 30 mm and 50 mm high. 
     In some embodiments, the walls of the latticework are of substantially identical cross-section. 
     In some embodiments, the walls of the latticework comprise a T section, wherein the wall includes a wider section at the lower surface, to provide additional weight bearing capability when not filled with concrete. 
     In accordance with another aspect of the present disclosure there is provided a pavement course comprising a plurality of connected support products, wherein each support product comprises; a latticework of walls and a plurality of edges, wherein the walls extend between a lower surface and an upper surface and define a plurality of cells, wherein at least one edge comprises a catch and a partial keyway, wherein adjacent support products are connected by respective catches to restrain relative movement, and wherein the partial keyway is located adjacent to a partial keyway of a connected support product, so that adjacent partial keyways define a complete keyway between connected support products, and wherein the pavement course comprises concrete extending from the lower surface to the upper surface so that the cells and keyways are substantially filled with concrete. 
     In some embodiments, the pavement course further comprises an edge formwork piece configured to connect to catches of the support products, wherein the edge formwork pieces define an edge of the pavement course. 
     In some embodiments, the edge formwork piece is constructed of a constant section, having a slot configured to receive an intermediary connector. 
     In some embodiments, the edge formwork piece comprises catches configured to connect with catches of the support product. 
     In accordance with another aspect of the present disclosure there is provided a method of constructing a pavement course, wherein the pavement course comprises a plurality of connected support products, wherein each support product comprises; a latticework of walls and a plurality of edges, wherein the walls extend between a lower surface and an upper surface and define a plurality of cells, wherein at least one edge comprises a catch and a partial keyway, and wherein each partial keyway is configured to be located adjacent to a partial keyway of a connected support product, so that adjacent partial keyways define a complete keyway between connected support products, and wherein the method comprises the following steps:
         a. Connecting a plurality of support products using adjacent catches, to create an array substantially spanning an area for which the pavement course is to be provided,   b. Pouring concrete onto the array, so that the cells and complete keyways of the array of support products are substantially filled with concrete,   c. Allowing the concrete to set.       

     In some embodiments, the method comprises the following step after step b:
         bi. Levelling the upper surface using a vibrating screed.       

     In some embodiments, the method further comprises the following step after step c:
         ci. once the concrete has hardened, finishing the upper surface using a chopper.       

     In accordance with another aspect of the present disclosure there is provided a method of repairing a void in a pavement course, wherein the pavement course comprises a plurality of connected support products, wherein each support product comprises; a latticework of walls, a cylindrical access cell and a plurality of edges, wherein the walls extend between a lower surface and an upper surface and define a plurality of cells, wherein at least one edge comprises a catch and a partial keyway, wherein adjacent support products are connected by respective catches to restrain relative movement, and wherein the partial keyway is located adjacent to a partial keyway of a connected support product, so that adjacent partial keyways define a complete keyway between connected support products, and wherein the pavement course comprises concrete extending from the lower surface to the upper surface so that the cells and keyways are substantially filled with concrete, and wherein the method comprises the following steps:
         a. Drilling through the concrete of a cylindrical access cell, wherein the cylindrical access cell is located above the void to be repaired   b. Injecting filler product (not shown) into the void until the void, and the cylindrical access cell are substantially filled.       

     In some embodiments, the filler product is selected from a list comprising; non-shrink construction grout, expanding foam, expanding polymer based grouts and other chemical grouts. 
    
    
     
       BRIEF DESCRIPTION OF DRAWINGS 
       The present disclosure will now be described, by way of example, with reference to the accompanying drawings, in which: 
         FIG.  1   a    is a cross-section of a conventional construction of a flexible pavement, showing the different courses of material. 
         FIG.  1   b    is a cross-section of a conventional construction of a rigid pavement, showing the different courses of material. 
         FIG.  1   c    is a cross-section of a conventional construction of a flexible pavement, showing the load applied by a wheel and how this can affect the subjacent course, creating a void, exemplary of a problem experienced by such pavements. 
         FIG.  1   d    is a cross-section of a conventional construction of a rigid pavement, showing the load applied by a wheel and how this can affect the subjacent course, creating a void, exemplary of a problem experienced by such pavements. 
         FIG.  2    is a plan view of a support product according to an embodiment of the present disclosure, with a region identified as ‘A’. 
         FIG.  3    is a close-up of region ‘A’, depicting the edge of a support product according to an embodiment of the present disclosure, showing a catch and a partial keyway. 
         FIG.  4    is a close-up of a portion of a support product according to an embodiment of the present disclosure, showing a pattern of latticework walls and a cylindrical access cell. 
         FIG.  5 A  is an isometric view showing a support product according to an embodiment of the present disclosure. 
         FIG.  5 B  is an isometric view of the support product of  FIG.  5 A  showing a number of edge regions. 
         FIG.  6    is an isometric view showing an edge formwork piece connected to a support product according to an embodiment of the present disclosure. 
         FIG.  7    is a plan view showing an edge formwork piece connected to a support product according to an embodiment of the present disclosure. 
         FIG.  8    is a plan view showing a pavement comprising an array of connected support products according to an embodiment of the present disclosure, to illustrate the pattern once the support products have been filled with concrete. 
     
    
    
     DETAILED DESCRIPTION 
       FIG.  1   a    shows a conventionally constructed flexible pavement  1 . The flexible pavement comprises a surface course  3 , a base course  5  and a sub-base  7  provided on top of a subgrade  9 . It will be understood that the sub-base  7  may be optional.  FIG.  1   b    shows a conventionally constructed rigid pavement  11 . The rigid pavement  11  comprises a surface course  13 , a base course and a sub-base  17  provided on top of subgrade  19 . It will be understood that the sub-base  17  may be optional. 
       FIG.  1   c    shows a typical load  90  applied to a conventionally constructed flexible pavement  92 .  FIG.  1   c    also shows a distribution  94  of this load  90  into a base course  96  or other subjacent course.  FIG.  1   d    shows the typical load  90  applied to a conventionally constructed rigid pavement  98 .  FIG.  1   d    also shows a distribution  102  of this load  90  into a base course  104  or other subjacent course. 
     Support Product 
     Referring to  FIGS.  2  to  5   , there is shown a support product  10 . The support product  10  may be in the form of a panel. The support product  10  is configured to receive a fill material. The fill material may comprise one or more of a cementitious material, a bituminous material and a granular fill material. Therefore, in some embodiments, the support product  10  is configured to receive poured concrete. 
     The support product  10  is configured to be connected to a plurality of additional support products  10 . Once connected, the fill material is provided to the support products  10 . The fill material may comprise one or more of a cementitious material such as cement, a bituminous material such as asphalt, and a granular fill material such as gravel. The filled support product  10  provides part of a path for the conveyance of traffic. As described herein, existing flexible pavements require a significant volume of material and depth, with an associated significant cost of construction. Damage to flexible pavements is also common. Rigid pavements are adversely affected by temperature changes, which can cause expansion and subsequent cracking of the rigid pavements. Rigid pavements can also be relatively expensive to construct and difficult to repair. The support product  10  described herein can enable the construction of a path such as a pavement for the conveyance of traffic that provides benefits that are typically only provided by one of flexible pavements or rigid pavements, as described in more detail below. 
     The support product  10  is configured to receive poured concrete. While described in the context of poured concrete, it will be understood that the support product  10  is also configured to receive other fill materials. The support product  10  comprises a latticework of walls  20  and a plurality of edges, wherein the walls  20  extend between a lower surface and an upper surface and define a plurality of cells  26 , wherein at least one edge comprises a catch and a partial keyway  50 , wherein the catch is configured to connect with a catch of an adjacent support product  10  to restrain relative movement of connected support products  10 , and wherein the partial keyway  50  is configured to be located adjacent to a partial keyway  50  of a connected support product  10 , so that adjacent partial keyways  50  define a complete keyway  55  between connected support products  10 . 
     The support product  10  comprises a pair of opposed major faces  14 ,  16 . The pair of opposed major faces  14 ,  16  comprises a first major face  14  and a second major face  16 . The first major face  14  is parallel to the second major face  16 . The support product  10  is generally rectangular. Therefore, the first major face  14  and the second major face  16  are generally rectangular. It is acknowledged that the term rectangular as used herein also includes square. 
     The support product  10  comprises a plurality of edge regions  62 ,  64 ,  66 ,  68  (see  FIG.  5 B ). The illustrated support product  10  comprises four edge regions  62 ,  64 ,  66 ,  68 . The support product  10  comprises a first edge region  62 . The support product comprises a second edge region  64 . The second edge region  64  is adjacent to the first edge region  62 . The support product comprises a third edge region  66 . The third edge region  66  is adjacent to the second edge region  64 . The support product comprises a fourth edge region  68 . The fourth edge region  68  is adjacent to the third edge region  66  and the first edge region  62 . 
     In some embodiments, the edge regions  62 ,  64 ,  66 ,  68  may be referred to as edges. In other words, in some embodiments, the support product  10  comprises a plurality of edges  30 . Therefore, the support product  10  may be said to be rectangular and comprise four edges. 
     The support product  10  comprises a plurality of minor faces  63 ,  65 ,  67 ,  69 . The support product  10  comprises a first minor face  63 . The first edge region  62  comprises the first minor face  63 . The support product  10  comprises a second minor face  65 . The second edge region  64  comprises the second minor face  65 . The second minor face  65  is orthogonal to the first minor face  63 . The support product  10  comprises a third minor face  67 . The third edge region  66  comprises the third minor face  67 . The third minor face  67  is orthogonal to the second minor face  65 . The third minor face  67  is parallel to the first minor face  63 . The support product comprises a fourth minor face  69 . The fourth edge region  68  comprises the fourth minor face  69 . The fourth minor face  69  is parallel to the second minor face  65 . The fourth minor face  69  is orthogonal to the first minor face  63  and the third minor face  67 . 
     Each of the plurality of minor faces  63 ,  65 ,  67 ,  69  can be considered to define an edge of the support product. 
     The support product  10  comprises a plurality of walls  20 . The walls  20  extend at least partially between the first major face  14  and the second major face  16 . In some embodiments, one or more of the walls  20  extend from the first major face  14  to the second major face  16 . The support product  10  comprises a plurality of cells  26 . The walls  20  meet at junctions to form the cells  26 . In other words, the plurality of cells  26  are defined by the walls  20 . 
     In some embodiments, the walls  20  may be said to extend between a lower surface and an upper surface to define the plurality of cells  26 . That is, each wall  20  may be said to extend from a lower surface (of that wall  20 ) to an upper surface (of that wall  20 ) to define at least part of a respective cell  26 . 
     Each wall  20  extends, to some extent, along a respective longitudinal axis  21 , lateral axis  23  and vertical axis  25 . By way of example, the longitudinal axis  21 , lateral axis  23  and vertical axis  25  of wall  20 ′ are shown in  FIG.  6   . Each of the longitudinal axis  21 , lateral axis  23  and vertical axis  25  of a particular wall  20  are orthogonal with respect to the other two axes. As the orientation of various walls  20  is different, each wall  20  may be considered to have its own associated longitudinal axis  21 , lateral axis  23  and vertical axis  25 . 
     Each wall  20  has a pair of major wall faces. Each wall  20  has an associated thickness at each portion of the wall  20 . The thickness of a portion of a wall  20  may be considered to be a dimension of the relevant wall  20  at that portion, measured in a direction parallel to the lateral axis  23  of the wall  20 . In some embodiments, the thickness of a particular portion of a wall  20  may be considered to be the shortest distance between the major faces of the wall  20  at that portion. 
     One or more of the walls  20  can be considered to have a first longitudinal end  27  and a second longitudinal end  29 . Each wall  20  has an associated length. The length of a particular wall  20  may be considered to be a distance between the first longitudinal end  27  of the relevant wall  20  and the second longitudinal end  29  of that wall  20  (see  FIG.  5   ) measured in a direction parallel to the longitudinal axis  21 . As described herein, a number of the walls  20  meet other walls  20  at one or more junctions  28 . In some embodiments, the end of a wall  20  may be considered to be taken as a centre point of the relevant junction  28 . In some embodiments, the end of a wall  20  may be considered to be where the wall meets the junction  28 . 
     One or more of the walls  20  can be considered to have a base end  31  and an elevated end  33 . Each wall  20  has an associated height. The height of a particular wall  20  may be considered to be a distance between the base end  31  and the elevated end  33 . 
     Each cell  26  has at least one cell opening. The cells  26  are configured to receive the fill material via the cell opening(s). The walls  20  define the cell openings. In the illustrated embodiment, each cell  26  comprises a first cell opening  35 . The first cell opening  35  is defined by the elevated end  33  of the walls  20  defining the relevant cell  26 . Each cell  26  also comprises a second cell opening  37 . The second cell opening  37  is defined towards the base end  31  of the walls  20  defining the relevant cell  26 . Each cell  26  of the illustrated embodiment defines a channel. The cells  26  extend at least partially between the first major face  14  and the second major face  16 . In the illustrated embodiment, the cells  26  extend from the first major face  14  to the second major face  16 . The cells of the illustrated embodiment therefore define channels that fluidly connect the first major face  14  and the second major face  14  of the support product  10 . 
     In some embodiments, the wall thickness of one or more of the walls  20  is constant. In some embodiments, the thickness of one or more of the walls  20  may change across the wall  20 . For example, in some embodiments, the thickness of one or more of the walls  20  may increase along at least part of the wall  20  from near or at the base end  31  towards the elevated end  33 . In other words, the thickness of one or more of the walls  20  may be greater at the elevated end  33  than near or at the base end  31 . In some embodiments, the thickness of one or more of the walls  20  may decrease along the wall from the base end  31  to the elevated end  33 . In other words, the thickness of one or more of the walls  20  may be lower at the elevated end  33  than at the base end  31 . 
     One or more of the walls includes an opening  34  (see  FIG.  5   ). In particular, one or more of the walls includes a plurality of openings  34 . In the illustrated embodiment, the walls  20  that define the cells  26  comprise two openings  34  each. The openings fluidly connect the cells  26 . That is, the openings  34  enable a fluid contained in one cell  26  to move to an adjacent cell  26 , via the openings  34 . The openings  34  are located at the longitudinal ends  27 ,  29  of the walls  20 . The openings  34  are located closer to the base end  31  of the walls  20  than the elevated end  33 . In some embodiments, the openings  34  extend from at or near the base end of the walls  20 , towards the elevated end  33 , at the longitudinal ends  27 , of the walls  20 . 
     In some embodiments, it will be appreciated that the one or more of the walls  20  do not comprise the openings  34 . 
     As described herein, the walls  20  of the support product  10  define a latticework. In some embodiments, a height of the support product  10  is between 20 mm and 100 mm or between 30 mm and 50 mm. In some embodiment, one or more of the walls  20  has a height between 20 mm and 100 mm or between 30 mm and 50 mm. In some embodiments, the latticework of walls  20  may be between 20 mm and 100 mm high. In some embodiments, the latticework of walls  20  may be between 30 mm and 50 mm high. 
     The walls  20  may be of substantially identical cross-section. 
     The support product  10  may be symmetrical about both a horizontal centreline and a vertical centreline. 
     In some embodiments, the support product  10  comprises a polymer. The support product  10  may be constructed of polymer. The support product  10  may be a constructed of a composite material comprising a polymer. 
     Repeated Cell Structure 
     At least some of the plurality of walls  20  define at least part of the cells  26 . The cells  26  are configured to receive the fill material. Each cell  26  may be said to have a three-dimensional shape. The three-dimensional shape of a cell  26  corresponds to the three-dimensional volume of the cell  26 , as defined at least partly by the relevant walls  20 . Each cell  26  may also be said to have a planar profile  39 . The planar profile  39  of a cell  26  may be referred to as a cell planar profile. The planar profile  39  of a cell  26  is the profile of the cell  26 , when viewed from a plan view (i.e. from above, as shown in  FIG.  2   ). The planar profile  39  of a cell  26  may be a function of the height of the cell  26 . That is, as the height of the cell is transited (e.g. from the base end  31  to the elevated end  33 , the planar profile  39  of the cell may vary (e.g. with varying thickness of the walls  20  defining the cell  26 ). 
     As described herein, one or more of the walls  20  of the plurality of walls  20  of the support structure  10  meets another wall  20  of the plurality of walls  20  at a junction  28 . The junctions  28  can be used as reference points to define a planar shape of the cells  26 . Specifically, a cell perimeter profile  38  can be determined by connecting the junctions  28  of a respective cell  26  with straight lines. The cell perimeter profiles  38  described herein are determined by connecting the junctions  28  of the cells  26  at the elevated end  33  of the walls  20 . It will be understood however, that the cell perimeter profiles  28  may be determined in a similar way at a different elevation (e.g. at a point between the base end  31  and the elevated end  33  of the walls). 
     In the illustrated embodiment, the perimeter profiles  38  of the cells  26  are quadrilateral. It will be understood that in some embodiments, one or more of the cells  26  may have a perimeter profile  38  that is not a quadrilateral. For example, the perimeter profile  38  may be another polygonal profile (e.g. triangular or hexagonal). In some embodiments, the perimeter profile  38  may be an asymmetric polygon. 
     Each cell  26  has a respective cell planar profile  39 . The cell planar profile  39  of a particular cell  26  is the profile defined by the surfaces of the walls  20  that define that cell  26 . Such wall  20  surfaces may be referred to as ‘inner surfaces’ with respect to the particular cell  26 . One or more of the cells  26  has a quadrilateral cell planar profile  39 . In particular, one or more of the cells  26  has a cell planar profile  39  resembling a rhombus. 
     It will be understood that geometric terms such as ‘polygon’, ‘quadrilateral’ and ‘rhombus’ used herein are intended to be generally indicative of a particular geometry, without excluding other similar geometries. For example, where the term quadrilateral is used herein, it will be understood that the relevant quadrilateral geometry does not necessarily need precisely defined corners to fall within the scope of the term quadrilateral. That is, the term quadrilateral herein is intended to include rounded quadrilaterals (i.e. quadrilaterals with rounded corners) and other minor variations to the specific geometric definition of a quadrilateral as being a shape with 4 straight sides and 4 corners. For example, referring to cell  26 B of  FIG.  4   , it can be seen that the planar profile of the cell includes 4 straight edges, 3 rounded corner regions and a corner region that is defined in part by a wall  20  defining a circular junction  28 . Herein, shapes such as this will be described as quadrilateral, or as a polygon, as their prominent features resemble that of a quadrilateral and/or a polygon (i.e. 4 straight edges), even if such shapes do not necessarily meet the strict mathematical definition of a quadrilateral and/or polygon requiring a number precisely defined corners. 
     Referring to  FIGS.  2  and  4   , a number of the walls  20  of the support structure  10  define a cell structure  36 . The cell structure  36  comprises a plurality of cells  26 . The cell structure  36  is repeated throughout at least part of the support product  10 . In the illustrated embodiment, the cell structure  36  is repeated throughout the support product  10 , with one instance of the cell structure  36  being immediately adjacent to a number of other instances of the cell structure  36 . The adjacent cell structures  36  share a number of common walls  20 . In other words, one particular wall  20  defines part of a cell  26  in one cell structure  36  and part of a cell  26  in an adjacent cell structure  36 . That is, in some embodiments, each instance of the cell structure  36  shares at least one wall  20  in common with another instance of the cell structure  36 . 
     The junctions  28  can also be used as reference points to define a planar shape of the cell structure  36 . Specifically, a perimeter profile  38  of the cell structure  36  can be determined by connecting the junctions  28  of the cell structure  36  that fall on the perimeter of the cell structure  36  with straight lines (for example, as shown for one group of cells  26  forming a cell structure  36  in  FIG.  2   ). In the illustrated embodiment, the perimeter profile  38  of the cell structure  36  forms an asymmetric polygon. 
     One or more of the cells  26  of the cell structure  36  is a quadrilateral. In other words, the cell perimeter profile  38  and/or the cell planar profile of one or more of the cells  26  of the cell structure  36  is a quadrilateral. In the illustrated embodiment, each of the cells  26  of the cell structure  36  is a quadrilateral. That is, the cell perimeter profile  28  and the cell planar profile of each of the cells  26  of the cell structure  36  is a quadrilateral. 
     One or more of the cells  26  of the cell structure  36  is symmetrical. One or more of the cells  26  of the cell structure  36  is regular. That is, each side of one or more of the cells  26  is of equal length. 
     Referring to  FIG.  4   , the cell structure  36  comprises a first cell  26 A. The first cell  26 A is a first shape. The first shape is defined, at least in part, by a first subset of the plurality of walls  20 . The first subset of the plurality of walls  20  comprises a number of walls  20 . The cell structure comprises a second cell  26 B. The second cell is a second shape. The second shape is defined, at least in part, by a second subset of the plurality of walls  20 . The second subset of the plurality of walls  20  comprises a number of walls  20 . 
     The first cell  26 A and the second cell  26 B share at least one wall  20 . That is, at least one of the walls  20  defines part of the first cell  26 A and part of the second cell  26 B. In other words, the second subset of the plurality of walls  20  comprises at least one wall  20  of the first subset. 
     The cell structure  36  comprises a first group of cells  44 . The first group of cells  44  comprises the first cell  26 A and the second cell  26 B. The first cell  26 A and the second cell  26 B are symmetrical about a first axis of symmetry. In other words, the first group of cells  44  comprises the first axis of symmetry and the first shape mirrors the second shape about the first axis of symmetry. The first axis of symmetry is parallel to the longitudinal axis of the wall  20  that is shared by the first cell  26 A and the second cell  26 B. In particular, the first axis of symmetry extends along at least part of a wall  20  that is shared by the first cell  26 A and the second cell  26 B. 
     The cell structure  36  comprises a third cell  26 C. The third cell is a third shape. The third shape is defined, at least in part, by a third subset of the plurality of walls  20 . The third subset of the plurality of walls  20  comprises at least one wall  20  from the first subset. The third subset of the plurality of walls  20  comprises at least one wall  20  from the second subset. In the illustrated embodiment, the third subset comprises one wall  20  from the second subset and one wall  20  from the first subset. That is, the third cell  26 C and the first cell  26 A share a wall  20 . Similarly, the third cell  26 C and the second cell  26 B share a wall  20 . 
     The cell structure  36  comprises a fourth cell  26 D. The fourth cell  26 D is a fourth shape. The fourth shape is defined, at least in part, by a fourth subset of the plurality of walls  20 . The fourth subset of the plurality of walls  20  comprises a number of walls  20 . The cell structure comprises a fifth cell  26 E. The fifth cell  26 E is a fifth shape. The fifth shape is defined, at least in part, by a fifth subset of the plurality of walls  20 . The fifth subset of the plurality of walls  20  comprises a number of walls  20 . 
     The fourth cell  26 D and the fifth cell  26 E share at least one wall  20 . That is, at least one of the walls  20  defines part of the fourth cell  26 D and part of the fifth cell  26 E. In other words, the second subset of the plurality of walls  20  comprises at least one wall  20  of the first subset. 
     The third subset of the plurality of walls  20  comprises at least one wall  20  from the fourth subset. The third subset of the plurality of walls  20  comprises at least one wall  20  from the fifth subset. In the illustrated embodiment, the third subset comprises one wall from the fourth subset and one wall from the fifth subset. 
     The cell structure  36  comprises a second group of cells  46 . The second group of cells  46  comprises the fourth cell  26 D and the fifth cell  26 E. The fourth cell  26 D and the fifth cell  26 E are symmetrical about a second axis of symmetry. In other words, the second group of cells  46  comprises the second axis of symmetry and the fourth shape mirrors the fifth shape about the second axis of symmetry. The second axis of symmetry is parallel to the longitudinal axis of the wall  20  that is shared by the fourth cell  26 D and the fifth cell  26 E. In particular, the second axis of symmetry extends along at least part of a wall  20  that is shared by the fourth cell  26 D and the fifth cell  26 E. 
     The first group of cells  44  and the second group of cells  46  are symmetrical about a third axis of symmetry. That is, the first group of cells  44  mirror the second group of cells  46  with respect to the third axis of symmetry. The third axis of symmetry bisects the third cell  26 C. 
     The walls  20  that define the first through fifth cells  26 A-E together form a hexagonal wall profile. In particular, the hexagonal wall profile is an elongated hexagon. This wall  20  and/or cell  26  configuration can improve the performance of the support product  10  under compressive loads. 
     The cell structure  36  comprises a sixth cell  26 F. The sixth cell  26 F is a sixth shape. The sixth shape is defined, at least in part, by a sixth subset of the plurality of walls  20 . The sixth subset of the plurality of walls  20  comprises at least one wall  20  from the fifth subset. In the illustrated embodiment, the sixth subset comprises one wall  20  from the fifth subset. That is, the fifth cell  26 E and the sixth cell  26 F share a wall  20 . 
     It will be understood that the ‘shape’ of a cell  26 A-F of the cell structure  36  described herein may refer to one or more of the three-dimensional shape, cell perimeter profile  28  and the cell planar profile of the relevant cell  26 A-F. When referring to the three-dimensional shape, one or more of the first shape, second shape, third shape, fourth shape, fifth shape and sixth shape may be a rhombic prism. When referring to the cell perimeter profile or the cell planar profile, one or more of the first shape, second shape, third shape, fourth shape, fifth shape and sixth shape may be a rhombus. 
     Partial Keyway 
     The support product  10  comprises a partial keyway  50 . The partial keyway  50  defines a re-entrant corner of the support product  10 . The partial keyway  50  is configured to receive part of a key (not shown). The partial keyway  50  extends inwardly from an edge of the support product  10 . In other words, the partial keyway  50  extends inwardly from one of the minor faces  63 ,  65 ,  67 ,  69  of the support product  10 . The edge (which may be part of one of the edge regions  62 ,  64 ,  66 ,  68 ) may, in some embodiments, be said to comprise the partial keyway  50 . 
     The partial keyway  50  is configured to inhibit outward motion of the key when the key is within the partial keyway. In other words, the partial keyway  50  is configured to inhibit movement of the key away from the support product  10  once the key is received within the partial keyway  50 . 
     The partial keyway  50  is configured to be located adjacent to a partial keyway  50  of another support product  10  that is connected to the described support product  10 , so that adjacent partial keyways  50  define a complete keyway  55  between connected support products  10 . Partial keyways  50  of adjacent support products  10  may define a complete keyway  55  having a chevron shaped section. 
     The support product  10  comprises an edge wall  54 . In particular, the plurality of walls  20  comprises the edge wall  54 . The edge wall  54  defines an edge plane. The edge plane is parallel to the edge wall  54 . In some embodiments, the edge plane is disposed at the relevant minor face  63 ,  65 ,  67 ,  69  and is parallel to that minor face  63 ,  65 ,  67 ,  69 . 
     The partial keyway  50  is defined, at least in part, by some of the plurality of walls  20 . The walls  20  that define the partial keyway  50  may be referred to as partial keyway walls  52 . The support product  10  may therefore be said to comprise a plurality of partial keyway walls  52 . The plurality of partial keyway walls  52  comprises a pair of offset partial keyway walls  56 ,  58 . The pair of offset partial keyway walls  56 ,  58  comprises a first partial keyway wall  56  and a second partial keyway wall  58 . The first partial keyway wall  56  is parallel to the second partial keyway wall  58 . The first partial keyway wall  56  is offset from the second partial keyway wall  58  so that the first partial keyway wall  56  and the second partial keyway wall  58  are separated by a separation distance. The pair of offset partial keyway walls  56 ,  58  extend parallel to a first direction  57 . The first direction  57  is transverse to the edge plane. That is, the first direction  57  and the edge plane are non-parallel. 
     The plurality of partial keyway walls  50  comprises a transverse partial keyway wall  70 . The transverse partial keyway wall  70  extends between the pair of opposed partial keyway walls  56 ,  58 . In other words, the transverse partial keyway wall  70  extends from one of the pair of offset partial keyway walls  56 ,  58  to the other of the pair of offset partial keyway walls  56 ,  58 . 
     The first partial keyway wall  56  meets the edge wall  54  at a junction  28 . This junction  28  may be referred to as a first junction. The first partial keyway wall  56  and the edge wall  54  define an acute angle at the first junction. At its other end, the first partial keyway wall  56  meets the transverse partial keyway wall  70  at a junction  28 . This junction  28  may be referred to as a second junction. The first partial keyway wall  56  extends from the first junction to the second junction. The first partial keyway wall  56  and the transverse partial keyway wall  70  define an acute angle at the second junction. 
     The transverse partial keyway wall  70  meets the second partial keyway wall  58  at a junction  28 . This junction  28  may be referred to as a third junction. The transverse partial keyway wall  70  extends from the second junction to the third junction. The transverse partial keyway wall  70  and the second partial keyway wall  58  define an obtuse angle at the third junction. 
     The second partial keyway wall  58  extends from the third junction to a wall end portion  72 . In the embodiment illustrated in  FIG.  3   , the wall end portion  72  is a junction between the second partial keyway wall  58  and another edge wall. The second partial keyway wall  58  is longer than the first partial keyway wall  56 . In the illustrated embodiment, the length of the second partial keyway wall  58  is double the length of the first partial keyway wall  56 . 
     The second partial keyway wall  58  and the first partial keyway wall  56  define a keyway opening  76 . In particular, the keyway opening  76  is defined by the first junction and the wall end portion  72  (which, in the illustrated case, is the junction between the second partial keyway wall  58  and the adjacent edge wall). The keyway opening  76  can be considered to be an opening in the edge region of the support product  10 . 
     The illustrated support product  10  comprises a plurality of partial keyways  50 . Each edge region  62 ,  64 ,  66 ,  68  comprises at least one partial keyway  50 . In the illustrated embodiment, the first edge region  62  and the second edge region  66  each comprise ten partial keyways  50  and the second edge region  64  and the fourth edge region  68  each comprise four partial keyways  50 . 
     In some embodiments, the first partial keyway wall  56  and the second partial keyway wall  58  may be non-parallel. For example, the first partial keyway wall  56  and the second partial keyway wall  58  may extend, with respect to each other, such that an angle is formed at an intersection of lines tangential each of the walls  56 ,  58 . That is, the angle formed between a line extending along the first partial keyway wall  56  parallel to its longitudinal axis  21  may extend beyond the first partial keyway wall  56  and intersect a similar line extending along the second partial keyway wall  58  at an angle. The angle may be an acute angle. The angle may be a right angle. The angle may be an obtuse angle. 
     It will also be understood that although the first partial keyway wall  56  is shown as connected to the edge wall  54  at a junction  28 , this may not necessarily be the case. In some embodiments, the first partial keyway wall  56  and/or the second partial keyway  58  wall may terminate at a free end. Alternatively, the first partial keyway wall  56  and/or the second partial keyway  58  may terminate at a junction with a wall that is non-parallel to the relevant minor face of the support product  10 . 
     Planar Portion 
     The support product  10  comprises a planar portion  80 . The planar portion  80  is generally planar. That is, the planar portion  80  is generally parallel to the axes of a reference plane. The reference plane is parallel to one of the major faces  14 ,  16  of the support product  10 . In some embodiments, one of the major faces  14 ,  16  lies on the reference plane. 
     The planar portion  80  has a thickness in a direction that is generally perpendicular to the axes of the reference plane. The planar portion  80  extends, in the direction that is generally perpendicular to the axes of the reference plane, from a first planar portion face  82  to a second planar portion face  84  (see  FIG.  6   ). The first planar portion face  82  may be referred to as a lower face of the planar portion  80 . The second planar portion face  84  may be referred to as an upper face of the planar portion  80 . One or both of the first planar portion face  82  and the second planar portion face  84  are generally parallel to the reference plane. 
     The planar portion  80  comprises a channel  86 . The channel  86  extends from the first planar portion face  82  to the second planar portion face  84  to define a path through which fluid can flow through the planar portion  80 . The channel  86  is aligned with a cell  26  to provide a path through which fluid can flow through the support product  10 . The illustrated planar portion  80  comprises a plurality of channels  86 , each aligned with a respective cell  26 . Each channel  86  and cell  26  together provide a hole through the support product  10 . 
     In some embodiments, the planar portion  80  may be considered to be part of the plurality of walls  20 . That is, the walls  20  may be considered to have a thicker portion at their base end  31 , with the thicker portion comprising the planar portion  80 . When described in this way, it will be understood that the walls  20  may be considered to be thicker at a lower portion than at a higher portion. 
     In some embodiments, rather than the planar portion  80  being considered to be part of the walls  20 , the walls  20  may be considered to be connected to the planar portion  80 . 
     In some embodiments, the walls  20  are integrally formed with the planar portion  80 . For example, the walls  20  and the planar portion  80  may be formed in an injection moulding process such that the walls  20  and the planar portion  80  form an integrated structure. The walls  20  project from the planar portion  80 . In other words, the walls  20  extend away from the planar portion  80 . As described herein, each of the walls  20  extends from a base end to an elevated end  33 . The walls  20  are adjacent to the planar portion  80  at their base end  31 . The elevated end  33  of a particular wall  20  is further away from the planer portion  80  than the base end  31  of that wall  20 . The elevated ends  33  of the walls  20  define an elevated surface  43 . The elevated surface  43  faces away from the planar portion  80 . 
     Access Cell 
     The support product  10  comprises an access cell  60 . The access cell  60  is generally cylindrical. In other words, a cross-sectional profile of the access cell  60  is circular. The access cell  60  may therefore be referred to as a cylindrical access cell  60 . The access cell  60  is defined by a wall  20  of the support product. 
     The access cell  60  is configured to facilitate access below the support product  10 . In particular, the access cell  60  is configured to enable access beneath the support product  10  once installed. The access cell  60  extends from the first major face  14  of the support product  10  to the second major face  16  of the support product  10 . The access cell  60  is defined by a cylindrical wall  20 . The access cell  60  is disposed at a junction  28  of the support product  10 . In particular, the access cell  60  is disposed at a junction between the first group of cells  44 , the second group of cells  46  and the third call  26 C of the cell structure  36 . In other words, a junction  28  between a number of the walls  20  of the plurality of walls  20  comprises the access cell  60 . 
     The access cell  60  is configured to contain the fill material. The fill material may be removed if access underneath a section of pavement constructed using the support product  10  is required. For example, where the fill material is concrete, the concrete contained within the access cell  60  during use can be removed (e.g. with a drill), creating a channel through which a space underneath the support product  10  can be accessed. After the need to access underneath the support product is remediated, the access cell  60  can again be filled with the relevant fill material and the pavement can continue to be used. 
     The cylindrical access cell  60  may comprise protrusions into the cell to retain the hardened concrete cylinder and prevent it from being accidentally ejected. The illustrated access cell  60  comprises a plurality of inwardly projecting projections. 
     The illustrated support product  10  comprises a plurality of access cells  60 . 
     Connecting Multiple Support Products 
     The support product  10  is configured to be connected to one or more other support products  10  during the construction of a path. Herein, a path may be considered to comprise one or more of a pavement and a granular track configured to enable the movement of vehicles or people. The support product  10  comprises a connection system  45  to facilitate this connection. The connection system  45  may comprise one part of a first support product  10  and another part of a second support product  10 , with the parts of the respective support products  10  cooperating to enable the connection of the support products  10 . This connection of the support products  10  may be referred to as a first connection. It may also be referred to as an initial connection of the support products  10 . This connection is configured to enable the support products  10  to be aligned in a way that facilitates the construction of a second connection (which can involve the fill material and/or a key). When the support products  10  are connected using the connection system(s)  45 , a number of the partial keyways  50  of the first support product  10  are aligned with the partial keyways  50  of the second support product  10 , forming complete keyways  55 . 
     The support product  10  comprises a catch  40 . In particular, the connection system  45  may comprise the catch  40 . The catch  40  is configured to connect with a catch  40  of an adjacent support product  10  to restrain relative movement of connected support products  10 . 
     Each edge may comprise at least one catch  40  and at least one partial keyway  50 , wherein partial keyways  50  of opposed edges are symmetrical. 
     In other words, each edge region  62 ,  64 ,  66 ,  68  comprises at least one catch  40 . Each edge region  62 ,  64 ,  66 ,  68  also comprises at least one partial keyway  50 . 
     Each edge may comprise at least two partial keyways  50 . Each edge region  62 ,  64 ,  66 ,  68  may comprise at least two partial keyways  50 . 
     Each edge may comprise at least four partial keyways  50 . Each edge region  62 ,  64 ,  66 ,  68  may comprise at least four partial keyways  50 . 
     Each edge may comprise at least two catches  40 . Each edge region  62 ,  64 ,  66 ,  68  may comprise at least four catches  40 . 
     Each edge may comprise at least four catches  40 . Each edge region  62 ,  64 ,  66 ,  68  may comprise at least four catches  40 . 
     Each catch  40  may be either a first part or a second part. 
     The first part may be a male pin and the second part may be a female slot. 
     In some embodiments, the catch  40  comprises an outer catch portion  41  (see  FIG.  3   ). The outer catch portion  41  has a first width. The catch  40  comprises an inner catch portion  48 . The inner catch portion  48  has a second width. The first width is greater than the second width. Such a catch  40  may be referred to as a male catch. The male catch projects outwardly from one of the minor faces of the support product  10 . 
     In some embodiments, the catch  40  comprises a groove. The groove is a groove in one of the walls  20  of the support product. For example, the edge wall  24  may comprise the groove. The groove is configured to receive a male catch. 
     The illustrated embodiment of the support product  10  comprises a plurality of male catches and a plurality of female catches. The plurality of male catches project outwardly from one or more walls  20  of an edge region  62 ,  64 ,  66 ,  68 . The plurality of female catches are located on one or more walls of an edge region  62 ,  64 ,  66 ,  68  that is adjacent to the edge region  62 ,  64 ,  66 ,  68  from which the plurality of male catches project outwardly. In some embodiments, a pair of opposed edge regions  62 ,  64 ,  66 ,  68  comprise male catches and another pair of opposed edge regions  62 ,  64 ,  66 ,  68  comprise female catches. 
     In another embodiment, the first part may be an over hook and the second part may be an under hook. 
     A pair of adjacent edges of the support product  10  may comprise catches  40  having a first part, and an opposed pair of adjacent edges of the support product  10  may comprise catches  40  having a second part, to facilitate assembly of a large number of support products  10 . 
     In another embodiment, each catch  40  is comprised of a slot, and support products are connected using an intermediary connector  42 . 
     The intermediary connector  42  may be cotton reel shaped, having wider ends and a narrower mid-portion. 
     As described herein, multiple support products  10  are connected together using the connection systems  45  provided on each support product  10 . Partial keyways  50  of adjacent support products  10  may define a complete keyway  55  having a shape configured to prevent separation of adjacent support products  10 . 
     After the support products  10  are connected using the connection systems  45  of the multiple support products (e.g. with one support product  10  including a male catch that is aligned with, and connected to a female catch of another support product  10 ), the fill material can be provided. Multiple connected support products  10  are shown, by way of example, in  FIG.  8   . 
     In some embodiments, the fill material comprises a cementitious material. In such embodiments, the fill material can be poured onto the support product  10  so that it fills the cells  26  and the complete keyways  55 . Once the cementitious material cures, the hardened cementitious material within a complete keyway  55  will act as a key that inhibits relative movement of the connected support products  10 . 
     In some embodiments, the fill material can be a granular fill material such as gravel. In such embodiments, a key can be inserted into one or more of the complete keyways  55  formed when the multiple support products  10  are connected together using the relevant connection systems  45 . The key may be a metal part, a ceramic part, a concrete part, or a part comprising another material. The key is shaped to be received within a complete keyway  55 . Once the keys are inserted, the fill material can be provided, and the cells  26  can be filled with the fill material. In this case, the keys can inhibit relative movement of the connected support products in use. 
     Pavement Course 
     Referring to  FIGS.  6  to  8    there is provided a pavement course according to an embodiment of the present disclosure, the pavement course comprising a plurality of connected support products  10 , wherein each support product  10  comprises; a latticework of walls  20  and a plurality of edges  30 , wherein the walls  20  extend between a lower surface  22  and an upper surface  24  and define a plurality of cells  26 , wherein at least one edge comprises a catch  40  and a partial keyway  50 , wherein adjacent support products  10  are connected by respective catches  40  to restrain relative movement, and wherein the partial keyway  50  is located adjacent to a partial keyway  50  of a connected support product  10 , so that adjacent partial keyways  50  define a complete keyway  55  between connected support products  10 , and wherein the pavement course comprises concrete extending from the lower surface  22  to the upper surface  24  so that the cells  26  and keyways  55  are substantially filled with concrete. 
     In other words, the support product  10  described herein may be used in the construction of a path. The path may be referred to as a pavement course. The path comprises a plurality support products  10  that are connected together at their respective edge regions  62 ,  64 ,  66 ,  68 . The connected support products  10  are filled with a fill material, and, if required, one or more keys, to form the path. 
     The pavement course may further comprise an edge formwork piece  32 . The edge formwork piece  32  is configured to connect to catches  40  of the support products  10  at the edges of the pavement course. The edge formwork piece  32  defines an edge of the pavement course. 
     In one embedment, the edge formwork piece  32  may be constructed of a constant section, having a slot configured to receive an intermediary connector  42 . 
     In another embodiment, the edge formwork piece  32  may comprise catches configured to connect with catches  40  of the support product  10 . 
     The fill material may be provided to the connected support products  10  after the connection of the necessary edge formwork pieces  32  to the edge regions of the support products  10  forming edges of the path. 
     Method of Constructing a Pavement Course 
     In accordance with another aspect of the present disclosure there is provided a method of constructing a pavement course. As described herein, the pavement course may be, more generally, described as a path. The pavement course comprises a plurality of connected support products  10 . Each support product  10  comprises a latticework of walls  20  and a plurality of edges  30 . The walls  20  extend between a lower surface and an upper surface and define a plurality of cells  26 . At least one edge  30  comprises a catch  40  and a partial keyway  50 . Each partial keyway  50  is configured to be located adjacent to a partial keyway  50  of a connected support product  10 , so that adjacent partial keyways  50  define a complete keyway  55  between connected support products  10 . 
     The method comprises one or more of the following steps:
         a. Connecting a plurality of support products  10  using adjacent catches  40 , to create an array  12  substantially spanning an area for which the pavement course is to be provided,   b. Pouring concrete onto the array  12 , so that the cells  26  and complete keyways  55  of the array  12  of support products  10  are substantially filled with concrete,   c. Allowing the concrete to set.       

     The method may comprise the following step after step b:
         b. Levelling the upper surface using a vibrating screed.       

     The method may comprise the following step after step c:
         c. once the concrete has hardened, finishing the upper surface using a chopper.       

     Described differently, the method comprises connecting a plurality of the support products  10 . The relevant connection systems  45  may be used, as described herein. The support products  10  may be connected to form an array  12  of support products  10 . 
     As described herein, the support product  10  is configured to be aligned with a second support product  10  such that the partial keyway  50  of the support product  10  and a partial keyway of the second support product  10  form a complete keyway  55 . The complete keyway  55  may be referred to as a keyway. The keyway is configured to receive a key. In use, the partial keyway walls  52  are configured to cooperate with the key to inhibit relative movement of the support product  10  and the second support product  10 , as described herein. This is, at least in part, as the partial keyway  50  extends inwardly from an edge of the support product  10 . 
     In use, a plurality of support products  10  are located adjacent one another and connected using the catches  40  on their respective edges  30 . 
     The connected support products  10  create an array  12 . The array  12  may be said to have latticework walls  20  extending across the area designated for the pavement course  100 . The array of support products  10  may cover an area over which it is desired to form a path. 
     The support products  10  may be laid upon subgrade, sub-base or base course, and may therefore be able to substitute different courses. 
     The base course may further have cracker dust, also known also crusher dust, applied and compacted, before the support products  10  are laid. 
     Where edges of the area do not align with edges  30  of the support products  10 , support products  10  may be cut to suit. 
     Edge formwork  32  pieces may be connected to support products  10 , thus providing integrated formwork and removing the requirement for conventional formwork. 
     The method comprises providing a fill material to the support products  10 . The fill material is provided so that its received within the cells  26  (and where relevant, the complete keyways  55 ). As described herein, if the fill material is not to be used as a key, separate keys can be included in the complete keyways  55  prior to providing the fill material. 
     If the fill material requires curing, the method can comprise allowing the fill material to cure after being received within the cells  26 . 
     In some embodiments, the method comprises levelling the path using a vibrating screed. In other words, the connected support products  10 , which are filled  3  with a concrete mix, may be levelled at the upper surface using a vibrating screed. Further, an upper surface of the path may be finished. The upper surface may be finished using a chopper. In other words, once hardened, the concrete of the embodiments involving concrete may be finished using a chopper. 
     Method of Repairing a Pavement Course 
     In accordance with another aspect of the present disclosure there is provided a method of repairing a void in a pavement course. The pavement course comprises a plurality of connected support products  10 . Each support product  10  comprises; a latticework of walls  20 , a cylindrical access cell  60  and a plurality of edges. The walls  20  extend between a lower surface and an upper surface and define a plurality of cells  26 . At least one edge  30  comprises a catch  40  and a partial keyway  50 . Adjacent support products  10  are connected by respective catches  40  to restrain relative movement. The partial keyway  50  is located adjacent to a partial keyway  50  of a connected support product  10 , so that adjacent partial keyways  50  define a complete keyway  55  between connected support products  10 . The pavement course comprises concrete extending from the lower surface to the upper surface. The cells  26  and keyways  55  are substantially filled with concrete. The method comprises the following steps:
         d. Drilling through the concrete of a cylindrical access cell  60 , wherein the cylindrical access cell  60  is located above the void  110  to be repaired,   e. Injecting filler product into the void  110  until the void  110  and the cylindrical access cell  60  are substantially filled.       

     In other words, where a path constructed using the support product  10  described herein is experiencing degradation, for example, by way of a void developing under the section of the path that comprises the support product  10 , the support product  10  enables the path to be repaired. The path can be repaired using a method, as described herein. 
     Specifically, the fill material contained within the access cell  60  can be removed. This can be done, for example, with a drill. The access cell  60  will provide a path underneath the relevant support product following removal of the fill material. A filler product can then be injected into the void that has developed under the path. The  33  filler product can be injected to fill the void. Once the void is filled, new fill material can be provided into the access cell  60  to return the path to an operational state. This method, and the provision of the access cell  60 , enable the path to be repaired inexpensively, and without significant structural disruption to the rest of the path. 
     Advantages 
     The support product  10  described herein provides a number of significant advantages. 
     Existing flexible pavements require a significant volume of material and excavated depth. Higher material volumes and exaction depths result in associated increased costs of construction. Damage to flexible pavements is also common. 
     Rigid pavements are adversely affected by temperature changes, which can cause expansion and subsequent cracking of the rigid pavements. Rigid pavements can also be relatively expensive to construct and difficult to repair. 
     The support product  10  described herein can enable the construction of a path such as a pavement for the conveyance of traffic that provides benefits that are typically only provided by one of flexible pavements or rigid pavements. 
     The inclusion of the support product  10  enables the path which is ultimately constructed using the support product  10  to flex, as the support product  10  is generally less rigid than a concrete or steel re-enforced concrete path. As the cells  26  of the support product  10  are filled with fill material, the compressive strength of the fill material can be utilised in use, whilst the flexibility of the support product  10  enables the path to flex when under load. A path constructed using the support product  10  can therefore provide benefits that are traditionally provided by only one of flexible pavements and rigid pavements. That is, a path constructed using the support product  10  can provide the benefits of a rigid pavement (e.g. where the fill material is concrete), whilst also providing the benefits of a flexible pavement, at least in part due to the flexibility provided by the support product  10  and the way the support product  10  divides the path into cells  26  of rigid fill material. Such characteristics can reduce the wear experienced by the path over time, and can lead to an increase in the working lifespan of a path constructed using the support product  10 . 
     The support product  10  enables the construction of a path that can support a high load whilst sustaining a reduced amount of damage. For example, a path  3  constructed using an array of connected support products  10 , in combination with concrete as a fill material, can provide sufficient structural integrity for a concrete truck to drive across without disturbing the subjacent base courses. 
     The construction of such a path using conventional methods could require a significant volume of concrete. The described support product  10 , and the described method of constructing a path using the support product  10  therefore remove or reduce the requirement for an expensive concrete pump in some instances, for example on a large expanse of pavement area. 
     Further, a composite pavement course constructed as described herein, comprised of support products  10  filled with a fill material, can achieve a large tensile load bearing capacity, when compared to known conventional flexible and rigid pavement courses. 
     A pavement course of support products  10  having a thickness of 40 mm between the upper surface and lower surface, filled with a 32 MPa rated concrete mix, has been shown to have compressive strength of 107 MPa without cracking. Thus, high strength paths of reduced thickness can be constructed using the support product  10  and an appropriate fill material. The pavement course constructed using support products  10  according to the present disclosure therefore requires less concrete per unit area of the path, due to the reduced thickness. 
     In other words, the support product  10  described herein enables the construction of paths with a relatively small vertical profile (i.e. depth, and therefore, corresponding excavation requirements), that are capable of supporting the transport of heavy vehicles. Such paths can be constructed using a reduced amount of materials, which can significantly reduce the cost of producing such a path, and the logistical difficulties associated with constructing such paths. 
     The openings  34  of the support product  10  advantageously enable fill material to flow between cells  26  during construction. This enables the fill material to settle at a relatively constant height throughout the path that is being constructed. 
     No formwork or additional concrete reinforcement is required, saving both time and cost. 
     In the example detailed above with an illustration of the compressive strength of a pavement course constructed using the support product, the concrete required is approximately 0.04 m3 per square metre, significantly less than either a conventional rigid pavement or flexible pavement. Further, the reduced thickness of the pavement course requires less excavation and material than conventional pavements. Less excavation means less expensive heavy machinery, lower risk of hitting or disrupting underground services, and reduced schedules. 
     The load profile of a pavement course according to the present disclosure is similar to a rigid pavement, as depicted in  FIG.  1   c   , with the load being spread due to the tensile stress being carried through the support product filled with concrete. 
     As such, any defects or voids beneath the pavement course  10  are shallower than would be experienced by flexible pavements. 
     In addition, due to higher tensile strength, the pavement course  100  has a greater loading capacity and may continue to operate with a defect below the pavement course  100 , for a longer period without failure which requires repair, than conventional pavements. 
     In the event of a void appearing under the pavement course  100 , access beneath the pavement course  100  can be provided by removing a single cell of concrete, and injecting a suitable filler product to fill the void. Further, prior to repair, the flexibility of the support product  10  enables the path to flex to partially accommodate the void. This can reduce damage to the composite pavement (i.e. the support product filled with fill material) caused by damage underneath the pavement. 
     Once cured, the pavement constructed using support products  10  according to the present disclosure is comprised of a plurality of cured concrete cells  26  and keyways interconnected by the support product  10 . 
     The combination provides structural integrity significantly exceeding conventional pavements at lower thickness. 
     Importantly, the partial keyways  50  between each support product  10  allow concrete keys to form across connecting edges, so that connected support products  10  are restrained. 
     This removes the requirement for conventional ties or steel dowels, and allows the construction of a concrete pavement course with no movement or expansion joints required. 
     The term concrete, as used throughout the specification, is intended in an inclusive sense to include any cementitious or bituminous product. The term concrete is also intended to include 
     Modifications and variations as would be apparent to a skilled addressee are deemed to be within the scope of the present disclosure. 
     In the claims which follow and in the preceding description, except where the context requires otherwise due to express language or necessary implication, the word “comprise” or variations such as “comprises” or “comprising” is used in an inclusive sense, i.e. to specify the presence of the stated features but not to preclude the presence or addition of further features in various embodiments of the disclosure.