Effective Light-weight Masonry Mortars with Dispersed Reinforcement

Abstract

The article is devoted to the development of masonry mortars with hollow ceramic microspheres and reinforcing fibers with improved properties. The mortars with ceramic microspheres and light-weight masonry mortars based on them have low average density, low thermal conductivity, high compressive strength, high specific strength, but insufficient crack resistance, frost resistance and mortar durability. One way of improvement of the properties of such mortars is the introduction of dispersed reinforcing fibers into their structure. In this study, the following types of fibers were used: basalt ones, glass ones, chrysotile ones and two types of polymer fibers – polyacrylic and polypropylene ones. The basic properties of mortar mixtures and mortar have been determined; the dependences of the influence of consumption of various fiber types on the basic properties of mortars have been studied, primarily, on the average density, compressive strength and tensile bending strength. The optimum composition of the masonry mortars with hollow ceramic microspheres and fibers were obtained, the results of microstructural analysis of the samples are given.