Foam fiber-reinforced concrete: technology and methodology of selection of the composition

Abstract

Disperse reinforcement of the mineral matrix in concrete technology makes it possible to manufacture structures of complex configuration, to solve problems of frost-resistance of products, minimize shrinkage deformations. The technologies of application of dispersed reinforcement of a concrete matrix with the help of synthetic, mineral and metal fibers has been developed. Perspective is considered reinforcement with basalt fiber - material resistant in alkaline environments of cement stone and having high adhesion to the mineral matrix. Foam concrete in industrial conditions is produced either in a one-stage or two-stage scheme. The technology of foam concrete of two-stage manufacturing has been studied quite well and its formulations have passed a wide approbation. The novelty of the research is the integration of basalt fibers into the concrete mix as a dispersive reinforcing component. This aspect has been given special attention in research. It is established that the consumption of basalt fiber affects both strength and density of cellular concrete products. The length of basalt fiber affects only the strength of products. As a result of the system analysis of penofibrobeton technology using the methodology of mathematical planning of a multifactorial experiment, obtaining results based on statistical analysis and optimizing these results, a mathematical model has been built and a technique has been developed of selecting of the composition penofibrobeton in densities from 400 to 600 kg/m3.