Properties Of Polymer Concrete Research Articles

Mechanical properties of reinforced polymer concrete with three types of resin systems

The mechanical properties of polymer concrete (PC) with three types of resin systems were investigated. First, the effect of 0.5 wt% to 3 wt% basalt fibre on the mechanical properties of a quaternary epoxy-based PC was investigated experimentally and the best weight percentage of basalt fibre was obtained. The results showed that adding basalt fibre to the PC caused an enhancement of 10% in compressive strength, 10% in flexural strength, 35% in the splitting tensile strength and 315% in impact strength. In the next step, the effect of nanoclay particles on the mechanical properties of basalt-fibre-reinforced PC was analysed experimentally. Nanoclays increased the compressive strength up to 7%, flexural strength up to 27% and impact strength up to 260% but decreased the tensile strength of the PC. Field-emission scanning electron microscopy was performed to study the fracture surface and morphology of various concrete specimens. In the last step, the effect of two different resin systems (rigid polyurethane and rigid polyurethane foam) on the mechanical properties of the reinforced PC was investigated. The epoxy PC was found to have a higher specific strength than the polyurethane and ultra-lightweight polyurethane foam PC.

Short glass fiber reinforced polymer concrete with addition of waste cathode-ray tube (CRT) glass

This paper describes the use of CRT glass waste for the production of polymer concrete. The CRT glass was subjected to a multistage mechanical disintegration process, in a way that allowed obtaining grains smaller than 2 mm. A set of hybrid reinforced polymer concrete was produced by using: ground CRT glass, sand and cut glass fibers 4.5 mm and 12 mm long. The influence of the volume of fibers and the length of glass fibers on the properties of polymer concrete with 30% by volume of epoxy resin, acting as a binder was described. Tests of CRT glass were carried out, among others study of chemical composition, particle size distribution and analysis of grain morphology. For polymer concrete, the flexural strength and compressive strength were determined, and the open porosity, apparent density, and water absorption were examined. The test results showed that polymer concrete with the use of milled CRT glass is a good way to manage this problematic waste. The polymer concrete has several times better than traditional concretes and significantly lower porosity and water absorption, which makes this material advantageous in applications such as the production of thin-walled products and products exposed to water and chemical attack. The addition of chopped glass fibers leads to an increase in mechanical properties and also protects the material against rapid disintegration after exceeding the maximum tresses, which is extremely important for the safety of use of the structure in the event of a failure.

THE USE OF COFFEE HUSK FIBER IN THE MAKING OF POLYMER CONCRETE WITH POLYESTER RESIN AS A BINDER

Research of polymer concrete had been made by using sand, pumice, coffee shell fiber and polyester resin. Research had been done in order to get the best combination. Then, it has pressd by using Hot Press at temperature of 90 ° C for 30 minu t es. The properties of polymer concrete has been analyzed that physical properties such as density, porosity, water absorbtion, mechanical properties, bending strength, compressive strength, tensile strength and photograph analysis by SEM-EDX. The result of research showed that the best combination based on test was sand 60 g, pumice, coffee shell fibe, and polyester resin with ratio of (8:2:30) gr that density 1,62 g/cm 3 ; porosity 1 . 70%; water absorbtion 1 . 04%; bending strength 7 . 40 MPa; compressive strength 10 . 92 MPa; and tensile strength 4 . 13 MPa. Keywords: Coffee shell fiber, polymer concrete, pumice, and sand.

Influence of the addition of styrene-butadiene rubber on the dynamic properties of polymer concrete for machine tool applications

In this study, the influence of the addition of styrene-butadiene rubber on the dynamic properties of polymer concrete was investigated. A 10% volume addition of styrene-butadiene rubber granulate with three different grain gradations was used for the tests. The modal study was carried out in the 0 to 2000 Hz frequency range. The response function for a single impulse excitation was tested. The relaxation time after excitation, the modes of natural vibrations and the amplitude of the transfer function values as well as vibration damping ratios were also compared. Finally, conclusions were formulated regarding the application of the styrene-butadiene rubber additive as a material to improve the dynamic properties of polymer concrete. The best results were obtained for a sample made with a 10% styrene-butadiene rubber volume addition with grain sizes from 0.6 to 2 mm. In this case, the biggest decrease of the amplitude of the transfer function value was 76%, while the biggest increase of the damping ratio was 431.5%, in comparison with the clear polymer concrete sample. The worst results were obtained for a sample made with a 10% styrene-butadiene rubber volume addition with grain sizes from 2.5 to 6 mm. In this case, the longest relaxation time of the sample, the increase of the amplitude of the transfer function value and the decrease in the damping coefficient were recorded.

Effects of adding sisal and glass fibers on the mechanical behaviour of concrete polymer

In this study, we investigated the influence of the addition of sisal and glass fibres on the mechanical properties of polymer concrete (PC). These types of concrete are used in many modern civil engineering applications. The prismatic specimens sized according to ASTM C580-02 were elaborated with a PC constituted by 14% constant mass of polyester resin matrix, a granular skeleton based on sand and powder marble. The reinforcement with 60% sand and 26% marble powder adopted in this investigation is the best formulation found in previous authors work. This composition was reinforced by 1 and 2% of sisal and glass fibres, the first one having lengths of 6 mm or 12 mm, however, the second unidirectional cut into bands. These specimens were subjected to 3-point bending monotonic loading. The results obtained were discussed and compared with those obtained for control beams without fibres reinforcement. It is important to note that the incorporation of the glass fibre contributes to an increase of the ultimate load of the polymer composite material produced, however, the addition of the sisal fibre lead to its decreases. In addition, the incorporation of 2% of sisal fibre having 6 mm length leads to a reduction of 26% of the mass of the specimens.

OPTIMIZATION OF GLASS FIBERS USED AS DISPERSE REINFORCEMENT OF EPOXY POLYMER CONCRETE WITH FLY ASH

Construction industry uses a huge quantity of traditional and modern building materials which generally are produced to satisfy different demands, such as: resistant and safety requirements, friendly with the environment, architectural aspects etc. Researches must solve any requirements related to materials properties and offer a large diversity from which the proper solution must be considered. For improving the mechanical properties of polymer concrete, the use of fibers of different types is a possibility that had been studied in the last decades. In the article, epoxy resin, fly ash and two sorts of river aggregates in a constant dosage were used in preparing experimental samples. Glass fiber waste was added in different dosages and lengths. Compressive strength, flexural strength and split tensile strength were experimentally determined. The bigger lengths and dosages of glass fiber determined high mechanical properties. In order to optimize the process, a regression analysis was applied for model determination and, after that, a self-adaptive Differential Evolution (DE) based approach was employed to determine the specific conditions that lead to a maximization of compressive strength (fc), flexural strength (fti) and tensile strength (ftd). The results obtained by simulation were accordingly to experimental results, the higher strengths being obtained for high fiber dosages.

Waste glass aggregate for cementitious and polymer concrete

Glass waste is produced in considerable amounts annually. Due to the disadvantageous nature of its recycling process, its reuse gains importance. Given the high reactivity level of glass-incorporating mixtures, the reuse of waste glass as aggregate in polymer concrete was investigated. Polymer concrete mixtures, including unsaturated polyester resin, hardener and accelerator, waste glass aggregate (up to 8 mm) and glass fabrics, were prepared for the investigation of mechanical properties. The composite specimens were reinforced by means of glass fabrics in various types (woven or mat), amounts (single or double layer) and orientation (perpendicular or parallel to loading direction). The mechanical properties of polymer concretes were tested for flexural tensile strength and compressive strength. In addition, thermal conductivity and residual strength after elevated temperatures were determined. It was concluded that these composites with easy preparation techniques have superior mechanical and thermal insulation properties compared with their counterparts available for use and their mechanical properties were mainly affected by the amount, type and orientation of the glass fabric reinforcement.

Süreksiz Fazlı Lifli Polimer Betonların Bazı Fiziksel ve Mekanik Özelliklerinin İncelenmesi

In this study, the effect of the ratio of mineral fillers on the properties of polymer concrete was investigated. The polypropylene, glass, carbon and steel were used as the phase material on production of polymer concrete. The polymer concretes was prepared using polyester types of resin and the phase materials at the six different rations (0%-3%-6%-9%-12%). The reaction temperature test, Schmidt surface hardness, ultrasonic pulse velocity, flexural and compressive strength tests were performed on the prepared mixtures and samples. It has been proposed that the fibers should be used for increasing the bending strength and prevent of occurring cracks due to the reaction temperature in the polymer concrete. It is concluded that it should be up to 6% although utilization rate changes according to types of fiber and resin in the polymer concrete

에폭시 기반 연성 폴리머 콘크리트의 자외선 노출에 의한 기계적 물성평가

This paper aims to evaluate material property variation of polymer concretes under ultra-violet exposure condition. The components and mixing ratio of the polymer composite specimens were determined by the previous research results. The equivalent UV exposure time was calculated with the consideration of the power of metal halide lamp and maximum 3 years were selected for the experiments. From the tests, it was found that the generated heat during UV exposure affected much the material properties of polymer concrete by means of post cure. As a result, the compressive strength increased and ductility factor decreased.

The effects of waste glass powder usage on polymer concrete properties

In order to improve basic characteristics of the materials such as strength and resistance, macro-level combinations are carried out to gather superior properties of two or more materials in one material. Polymer concrete is a composite material which was supported by quartz sand as filler that hardens with resin and hardener in continuous polymer matrix. In this study, the effects of the amount of resin used for the production of polymer concrete and the workability of the concrete produced by replacing quartz aggregate powder used as filler with waste glass powder in the ratios of 10%, 20%, 30%, 40% and 47% and their effects on compressive and flexural strengths were investigated. As a result of the studies conducted, along with an increase in the amount of resin used in polymer concrete, an increase was also provided in compressive and flexural strength of concrete. As a result of waste glass powder replacement by keeping the amount of resin fixed, important amounts of increase were found out in compressive and flexural strength of polymer concretes.

The Effect of Adding Chicken Wire as Steel Fibre on Some Properties of Polymer Concrete

The Effect of Adding Chicken Wire as Steel Fibre on Some Properties of Polymer Concrete

Properties of Polymer Concrete Based on Unsaturated Polyester Resin Modified with Monoethanolamine

Properties of Polymer Concrete Based on Unsaturated Polyester Resin Modified with Monoethanolamine

Properties of Polymer Concrete Based on Unsaturated Polyester Resin Modified with Diethanolamine

Properties of Polymer Concrete Based on Unsaturated Polyester Resin Modified with Diethanolamine

Bending and Bonding Properties of Sandwiched Polymer Concrete Composites

It is foreseen that the properties of Polymer Concrete (PC) can be further enhanced if the PC is bonded to or sandwiched between Glass Fibre Reinforced Plastic (GFRP) laminates, later termed as PC-GFRP system. In the present investigation, the performance of PC-GFRP was assessed in terms of its bending strength and bonding strength between PC and GFRP. Panels of PC size 500 mm × 500 mm × 20 mm were prepared. The panels then were cut into specimens of appropriate geometry and dimensions required for the tests. Four (4) different resin contents and different percentages of aggregate of different particle size distributions were employed in preparing the PC-GFRP specimens. A batch of PC specimens was layered with a Glass Fibre Reinforced Plastic (GFRP) laminate on one side (SSL) and the other batch PC specimens were sandwiched with two GFRP laminates (DSL). The PC-GFRP specimens were tested their bending strength under three-point load test and bonding strength between PC as a core material and glued GFRP laminate(s). The results showed that an increase in the resin content increases the bending strength of the PC regardless of the aggregate grading. The results also revealed that the PC specimens with well-graded aggregate recorded the highest bending strength, with coarser grading resulted in further increase. The bending strength of the PC-GFRP system improved significantly when the PC was externally reinforced with a GFRP laminate (SSL) but did not improve further when another layer of GFRP laminate was applied (DSL). The bonding strength between PC and GFRP was found to be increased as the resin content increases and the GFRP laminate bonded better to the PC as a core material if made of the overall aggregate size.

Studies on Furan Polymer Concrete

Good mechanical properties and excellent chemical resistance of polymer concretes make them cost effective material of construction for civil engineering applications. These properties of polymer concretes are dependant upon the type of polymeric binder and the filler materials used. In the present investigation, a series of polymer concretes based on furan resin have been prepared using an aggregate mix proportion having minimum void content. Density, water absorption and microstructure were studied for different combinations designed on the basis of mixture design concept of design of experiments. The effects of variables on the properties were discussed.

Influence of soaking and polymerization conditions on the properties of polymer concrete

An experimental investigation was conducted to study the effect of soaking time and polymerization temperature on the mechanical and physical properties of polymer-impregnated concrete. Soaking time was controlled in 4, 8, 12, 16, 20 and 24 h, polymerization temperature was set at 70, 80 and 90 °C for 0.5, 1, 2, 4, 6, 12 and 24 h in impregnation process, respectively. Cylindrical concrete specimens with water/cement ratios of 0.45 and 0.65 were impregnated with methyl methacrylate (MMA) and benzoyl peroxide (BPO) mixtures. The polymer loading increases as immersion time increases until 12 h. Based on compressive strength and surface absorption, optimum polymerization temperature is 70 °C for Mix A (high cement content) and 80 °C for Mix B (low cement content). Polymer impregnation not only increases concrete strength and resistivity but also greatly decreases surface absorption comparing with normal concrete. SEM and MIP observations indicate that the micro-pores and meso-pores of PIC specimens are filled with PMMA and the total pore volume and maximum pore size are reduced significantly.

몬모릴로라이트를 이용한 재활용 PET폴리머 콘크리트의 경화수축, 온도팽창계수, 압축강도

Recently, as concerns over environmental issues are raised more and more trend to use recycled waste for producing construction materials is also raised. Especially, a case of waste resin is considerably destroying the environment due to disposal way that most waste resin produced is disposed of landfill. This study is performed by polymer concrete with recycled PET resin in terms of obtaining safely clean construction resources and protection of environment. High setting shrinkage and sensitivity to heat are main disadvantages of Polymer Concrete (PC) despites of a lot merits. The aim of this study is to investigate basic properties such as setting shrinkage, length change and sensitivity to heat about PET recycled polymer concrete. The other is to check the possibility of use of Montmorillonite as one of a lot of additive without special coupling agent. As results of experiments, various properties of polymer concrete with recycled PET resin are similar with conventional PC except that polymerization time is longer. Montmorillonite was efficiently used to reduce setting shrinkage, length change and coenicient of thermal expansion related to heat with enhanced strength

Deformational Properties of Polymer Concrete during Long-Term Exposure to Water

Changes in the elastic and viscoelastic (creep) characteristics of polymer concrete and its structural components (polyester resin, unfilled or filled with diabase flour) during a long-term exposure to water at 20°C were studied. Modeling the structural changes in polymer concrete with time showed an increase in the relative volume content of pores filled with water and a decrease in that of unfilled pores. Based on the free-volume concept and the data on swelling due to moistening and shrinkage due to physical aging of the binder, a rather accurate estimate of the time-moisture reduction function for polymer concrete was obtained. The function was found to be nonmonotonic: the interval of increase was followed by an interval of decrease.

Mechanical Properties of Polymer Concrete Systems Made With Recycled Plastic

The mechanical properties of various polymer concrete (PC) systems using unsaturated polyester resins based on recycled polyethylene terephthalate (PET) plastic waste were evaluated. Resins using recycled PET offer the possibility of a lower source cost of materials for making useful PC products. Also, the recycling of PET in PC would help solve some of the solid waste problems posed by plastics and save energy.