Title: Durability of polyvinyl alcohol modified rubber cement-based composites
Abstract: To enhance the service performance of concrete dams in alpine regions, the effects of polyvinyl alcohol (PVA) modified waste rubber on the durability of cement-based composites were analyzed by the capillary absorption test, chloride ion resistance test, freeze-thaw test, and carbonation test. The effects of rubber particles with a volume fraction of 0-30% on the durability of cement-based composites were systematically evaluated before and after modifications by PVA solution with a mass fraction of 0.1%. The results showed that, when the volume fraction of rubber increases to 10%, the capillary water absorption, chloride ion penetration resistance, freeze-thaw resistance, and carbonization resistance of cement-based composites are all improved. After adding PVA, the adhesion between rubber particles and cement matrix is enhanced, especially when the integral number of rubber body is 10%, the cumulative pore volume decreases by 28.8%, further improving the durability of rubber cement based composite materials. Research can provide new ideas for the further application of rubber concrete in engineering practice.