Furfurol-Acetone Polymer Concrete

Composition of the Polymer Concrete Samples (weight parts) 

Ingredients Furfurol- Acetone Epoxy Polyester Rubber (RubCon)1 

Source Reprinted from Yu. Borisov, Yu. Potapov, O. Figovsky, D. Beilin, Water Resistance of the Polymer Concretes, J. Scientific Israel Advanced Technology 14, no. 3 (2012) 84—91. With permission. 

Compressive Strength of the Polymer Concretes (Time of exposition in water environment is one year.) 

Polymer Concrete Control Samples Water After Drying 

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The ultimate compressive strength of furfurol-acetone polymer concrete control samples is 65 MPa. The most intensive decrease in the strength of the samples stored in environments with humidity of 50% to 60% and 86% to 96%, starts with 110 days (Figure 1.6). 

Let s consider the reasons for decreases in the stress-strain parameters of furfurol-acetone polymer concrete in a wet environment. The process of water absorption by polymer concrete occurs in two ways by diffusion and absorption. The latter is associated with the presence of free benzene sulfonic acid, which is highly hygroscopic and absorbs moisture from the environment and thus increases... 

FIG U RE 1.7 Dependence of modulus elasticity of furfurol-acetone polymer concrete samples on exposition time at humidity of environment 1 50%-60%, 2 S5%-95%, 3 water immersion. (From Yu. Borisov, Yu. Potapov, O. Figovsky, and D. Beilin, Water Resistance of the Polymer Concretes, . /. Scientific Israel Advanced Technology 14, no. 3 (2012) 84-91. With permission.)... 

Deformation properties of the furfurol-acetone polymer samples are reduced to a much greater extent. The modulus of elasticity of the polymer concrete samples starts to decrease noticeably (about 10% to 15%) at 50% to 95% humidity after just 150 days for the samples in water, a 30% reduction of the modulus has been observed after 50 days (Figure 1.7). After 350 days, the modulus of elasticity is reduced by 28% for the samples in the environment with 50% to 60% humidity, 46% in the medium with 85% to 95% humidity, and 67% for the samples stored in water. As this takes place, the trend of modules is not identical the modulus of elasticity of the first two series of samples trends downward over time, whereas for the samples in water, this tendency stopped after 6 months of exposure. 

Polymer concrete samples of four compositions (Table 1.2) measuring 4 x 4 x 16 cm are prepared. Control samples were placed in a desiccator containing moisture absorption silica gel composition. Other samples were in environments with various humidity. The influence of environmental humidity on the compressive strength, modulus elasticity, and moisture absorption of furfurol-acetone, epoxy, polyester, and rubber (RubCon) polymer concrete samples are shown in Tables 1.3-1.5 and Figures 1.4 and 1.5. 

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