The Use of PVC Waste in Concrete with the Addition of PVAc

Studies of the flexural and compressive strength of concrete were carried out with the replacement of 20% of the volume of sand with crushed waste from PVC (polyvinyl chloride) panels and the addition of polyvinyl acetate (PVAc) in the amount of 10% of the mass of cement. The tests were carried out on the 28th day of hardening of the samples in the mode of changing relative humidity from 90–95% in the first two days to 55–60% in the rest of the hardening time. The TiO₂ photocatalyst was applied to the surface of the concrete to protect polymer concrete from UV irradiation and give it photocatalytic properties. A decrease in the workability of the mixture was recorded when PVC waste was added to the concrete composition, but the addition of PVAc to the mixture increased the workability to the minimum required value. The flexural strength of samples with PVC waste and the addition of PVAc decreased by 23.3%. Compressive strength decreased by 26.5% for these samples, and by 13.5% for concrete with PVC waste without the addition of PVAc.