Strength Properties of The Polymer – Cement Systems

Abstract

Generally, the polymer–cement systems consist of three main interacting components: polymer, cement, and water. However, other components, i.e. various fillings and additives, also affect the structure and properties of the central system. The paper aims at the investigation of the impact of the polymer type and its ratio in cement on the properties of the product.
The acrylatic copolymer water dispersion (ACD) as well as such familiar polymeric materials as polyvinyl acetate dispersion (PVAD) and butadiene - styrene latex SKS-65 G P (b) have been used. After a certain amount of time, the strength by pressure and bending, the layer flexibility, the sample deformations during the process of hardening, and strength alterations caused by water and frost have been determined. According to the dependency of the strength alteration in the polymer–cement mixtures, the acrylate copolymer dispersion by its operation resembles the polyvinyl acetate dispersion and butadiene - styrene latex. However, the hardened mixtures essentially differ by their elasticity and flexibility. Besides, with the increase of the amount of the PVAD in the mixture, the deformations of the sample contraction also increase. On the other hand, the growing amount of the acrylatie dispersion decreases the contraction. The authors present their opinion regarding the applicability of such systems in the sphere of repairing the building constructions, their protection, and trimming.