Repair compositions based on methyl methacrylate modified with polyphenylsiloxane resin for concrete and reinforced concrete structures

Abstract

In this paper, we consider the development of repair compositions for concrete and reinforced concrete structures based on methyl methacrylate modified with polymethyl phenyl siloxane resin. The condition has been studied and the problem analyzed in the country and abroad, as well as the selection of components for the repair composition. As a binder, methyl methacrylate curable with benzoyl peroxide in the presence of a catalyst - dimethylaniline and a modifier - polymethylphenylsiloxane resin would be used. The filler was finely ground quartz sand. The operational and physicomechanical properties of the resulting compositions were studied: photoabsorption, compressive strength, and tensile strength. Experimentally, the optimal ratio of polymethylphenylsiloxane resin in the composition was found to be 2.5 mass. parts of the modifier per 100 mass. parts including a binder. It was found that the introduction of polymethylphenylsiloxane resin does not significantly affect the adhesion characteristics, the tensile strength is reduced to a small extent. Moreover, the water absorption of the cured composition with a modifier content of 3 mass. parts compared with unmodified resin is reduced four times).