Query: Polymer concrete

title: Characteristics of polymer concrete produced from wasted construction materials
abstract: The recycling of materials to produce useful materials is very important subject for scientific research in our world now, because the diminution natural resources make a hole or risk in future of the world. The aim of our research is to produce polymer concrete (PC) has high mechanical and physical characteristics. This PC was prepared by using the waste of aggregates from demolitions and construction materials with low cost as compared as cement concrete. These types of construction and demolition waste were used as aggregates replacement (i.e. waste of cement/concrete debris, waste of ceramic tiles and the waste of building blocks) as well as natural and river sand. Unsaturated polyester resin was used as cement replacement. The weight percentages of resin were changed within (20, 25 and 30) to manufacture this polymer concrete. Physical test such as density and mechanical tests such as compressive strength, flexural strength, Splitting tensile strength and Schmidt hammer were performed. The results proved that all the mechanical properties of all prepared mortars were increased with increasing the weight percentage of polymer added while the density was decreased. This encourages us to us to use this type of polymer mortar in different applications as precast or partitions with high toughness.

title: Polymer concrete
abstract: Polymer concrete (PC) or resin concrete, consists of a polymer binder which may be a thermoplastic but more frequently is a thermosetting polymer, and a mineral filler such as aggregate, gravel and crushed stone. PC has higher strength, greater resistance to chemicals and corrosive agents, lower water absorption and higher freeze thaw stability than conventional Portland cement concrete.

title: Optimizing the mixture design of polymer concrete: An experimental investigation
abstract: Over the last few decades, polymer concrete (PC) has been finding use in quick repairing of concrete structures. However, there have been only few studies on the mechanical behavior of PC. The aim of this study is to evaluate the mechanical behavior of PC using destructive and non destructive tests (NDT) The mixtures were prepared with three different polymer ratios (10% 12% and 14% and two different coarse aggregate sizes (4.75 9.5 mm and 9.5 19 mm) The samples were subsequently tested under three different temperatures 15 degC, +25 degC, and +65 degC) The Taguchi method and analysis of variance (ANOVA) were used to optimize PC mixes based on the compressive, splitting tensile, and flexural strengths under varying polymer content, coarse aggregate size, and temperature. NDTs, including ultrasonic pulse velocity and electrical resistivity tests, were carried out to gain insights into the porosity and void content of the specimens. Scanning electron microscopy (SEM) was used to analyze the bonding interface between aggregates and polymer, microstructure phase, and pores that were present in the structure of the PC. Results show that a decrease in the temperature from +25 degC to 15 degC led to an improvement in the mechanical properties of PC mixes, whereas an increase in the temperature from +25 degC to +65 degC adversely affected the mechanical properties. Based on NDT, it was found that increasing the coarse aggregate size and polymer ratio reduced the porosity of specimens. This is attributed to the decreased surface area to volume ratio with increasing particle size, which allowed the polymer to completely coat the surface of aggregates. Finally, a set of expressions was proposed to predict the mechanical properties of PC.

title: Experimental study on the mechanical and thermal properties of basalt fiber and nanoclay reinforced polymer concrete
abstract: This paper describes the investigation of the synthesis and improvement of the mechanical properties of quaternary epoxy based polymer concrete (PC) using basalt fiber and clay nanoparticles. First, the effect of chopped basalt fiber on the compressive, flexural, splitting tensile and impact strengths as well as the effect of different temperatures (up to 250 degC) on the strength of fiber reinforced PC were investigated experimentally. Basalt fiber improved the mechanical properties and increased the thermal stability of PC. In the next step, the effect of nanoclay particles on the mechanical properties and the effect of high temperatures (up to 250 degC) on the strength of basalt fiber reinforced PC (BFRPC) were analyzed experimentally. Nanoparticles increase the compressive, flexural and impact strength as well as the thermal stability but decrease the tensile strength of the PC. SEM analysis was performed to study the fracture surface and morphology of various concrete specimens. The resulting polymer nanocomposite will be used as a lightweight polymer concrete with high mechanical strength and thermal stability.

title: Wastes as aggregate substitution in polymer concrete
abstract: The experimental study was effectuated on polymer concrete with wastes as substitution of aggregate. The polymer concrete was prepared with epoxy resin and aggregates in two sorts. Fly ash was added as filler and aggregate sort 0 4 mm was replaced in different dosages by saw dust and chopped PET bottles. The density and compressive strength were experimentally determined. The influence of waste as substitution of aggregate on density, workability and compressive strength was analyzed and compared with a control mix of polymer concrete prepared with natural aggregates and fly ash as filler. The wastes used as aggregate substitution decreased the density of polymer concrete, indicating a lightweight concrete for all mixes. The compressive strength for polymer concrete with wastes as aggregates substitution were closed as values to the control mix.

title: Physico Mechanical Properties and Microstructure of Polymer Concrete with Recycled Glass Aggregate
abstract: The paper presents an analysis of the possibility of using glass waste from worn out lighting materials as an aggregate for a polymer concrete. Glass waste was obtained from the company utilizing glass lighting elements, which was then subjected to crushing. The aggregate obtained was subjected to the tests of basic features, which were compared with aggregates that are traditionally applied to concretes. The next stage of the research program was the production of a polymer concrete that contained glass aggregate. Several types of mixtures were prepared in which glass waste was combined in various proportions with traditional sand gravel aggregate. As a part of the research, the basic physical and mechanical characteristics of polymer concretes were determined. The microstructure of composites was also analyzed using a scanning electron microscope. The results of the research have shown that the aggregate obtained from glass waste can be successfully used for the production of a polymer concrete. The most beneficial physico mechanical properties were obtained for a composite in which glass waste was used as a 50% substitute for traditional aggregate.

title: Investigating fracture mechanics and flexural properties of unsaturated polyester polymer concrete (UP PC)
abstract: Polymer concretes are particle composites of polymers which are filled by aggregates. Polyesters, epoxies and acrylics have been used as binders in these materials which polyesters due to their suitable properties and acceptable cost are considered by the most of industries. One of the most considered issues about polyester polymer concretes is their weak performance and the low durability against acids and alkaline solutions. In this research, fracture mechanics (CMOD and K1c) and flexural strength s of a polyester polymer concrete after 1, 3, 6 and 12 months of exposure to sulfuric acid 0.5 and 1 mol lit and carbonate/bicarbonate alkaline solution 0.0622 and 0.1245 mol lit were investigated. Results showed that both of aggressive solutions degraded polymer concrete samples. However acids caused more decrement in flexural strength and alkaline had more destructive effect on fracture mechanics. Furthermore, the concentration was more important in destructive effects especially for alkaline solution. The highest decrease in flexural strength, fracture toughness and CMOD were 37% 36.1% and 59% respectively. SEM analysis was used to assess morphological changes accrued at fractured surfaces of the samples.

title: A study on mechanical properties of polymer concrete containing electronic plastic waste
abstract: It is aimed to research the effects of electronic plastic waste (e plastic) on the mechanical properties of polymer concrete. E plastic was used as a part of the filling materials (quartz sand and gravel) to obtain polymer concrete in this study. Unsaturated polyester resin material has been chosen as the polymer material and used as binder in polymer concrete production. Resin/filling material ratio has been determined as 10 90% 15 85% and 20 80% e plastic/filling material ratio has been decided to be 0% 5% 15% and 25% 28 Day of axial compressive, flexural and splitting tensile strength values of the test samples were evaluated. The increase in the ratio of resin, increases the compressive strength while it does not cause a dramatic increase or decrease in the flexural and splitting tensile strength. Compressive, flexural and splitting tensile strength values decrease as the ratio of e plastic increases. On the other hand, electronic plastic waste increases the polymer concrete's ductility. Experimental study shows that ideal resin ratio and ideal e plastic ratio values are 15% and 5% respectively.

title: Experimental Investigation and Constitutive Modeling of Polymer Concrete and Sand Interface
abstract: AbstractIn this investigation, the behavior of the interface between polymer concrete and sand was studied. For this purpose, two sets of interface direct shear tests (over 40 tests) were conducted on the polymer concrete and sand interface. Moreover, two sets of tests (over 30 tests) were performed on the cement concrete and sand interface for comparison. Based on the experiments, the shear stress versus tangential displacement curves at different normal stresses, the interface friction angles, and the adhesion were obtained for each interface. Then, three different constitutive models proposed for interfaces were used to predict the observed response. Finally, after a quantitative comparison of the constitutive models, a pile in tension was modeled using the most accurate model for its interfacial behavior. The results of the proposed model were in excellent accordance with experimental data, and the results of pile modeling in tension showed the applicability of the model and obtained parameters.

title: Experimental and analytical evaluation of rubberized polymer concrete
abstract: Polymer concrete (PC) has been widely used for quick repairing of concrete pavement and structures in recent years. This paper studies the mechanical behavior of the rubberized polymer concrete. Crumb and chipped rubber were used to replace fine and coarse aggregates in PC, respectively. A complete series of destructive tests including impact test, compression and splitting tensile tests and non destructive methods including ultrasonic test, digital signal processing, electrical conductivity, and microstructure analysis was performed to demonstrate the various potential applications of the rubberized PC. X ray diffraction (XRD) also provided information regarding the chemical composition and crystal structure of three different epoxy resin ratios. The results indicated that the rubberized PC reduced the workability and increased the porosity and air content of the mixture; however, reduced the cost and density, and improved ductility. Scanning electron microscope was used to analyze the interface between aggregates and adhesive materials. The correlation between the compressive strength and ultrasonic pulse velocity was determined and proposed for the rubberized PC. PC containing crumb rubber had a lower pulse velocity and higher damping properties than that of chipped rubber. Further, the Taguchi method was used to determine the optimum conditions for mechanical properties of the rubberized PC and ANOVA was then utilized to evaluate the level of influence and existence of interaction parameters. Based on this investigation, the rubberized PC can be an appropriate candidate for repair and rehabilitation applications.