Control of physical and mechanical characteristics of non-autoclave cement porous concrete with micro-reinforcement method

Abstract

Improvement of quality characteristics of non-autoclave cement porous concrete is possible with its micro-reinforcement using polymer fiber. This article presents the author's experimental studies of optimizing the composition of porous concrete according to the following criteria: length (6 and 12 mm) and consumption of polymer fiber. During the experiment conducted according to standard procedures, the properties and structure of the obtained material were evaluated. Quantitative data was obtained on the effect of polyester fiber length and consumption on the strength of crack resistance and shrinkage of porous concrete. Using microscopic analysis, it was found that fibrous fiber creates a spatial mesh that provides micro-reinforcement effect. It was found out that the optimal fiber consumption is 1–2 kg per cubic meter of the mixture, and the main operational properties of the obtained concrete comply with the requirements of regulatory documentation.