DETERMINATION OF THE INFLUENCE OF THE PERCENTAGE OF DISPERSED REINFORCEMENT WITH STEEL FIBER ON THE STRENGTH CHARACTERISTICS OF CONCRETE.

Abstract

This article presents an overview of the field research on the effect of dispersed steel fibre reinforcement with a given percentage of reinforcement on the physical and mechanical characteristics of concrete samples, as well as describes the process of conducting experimental research.

The main disadvantage of concrete is insufficient tensile strength, which leads to low crack resistance. To improve the performance characteristics of concrete and reinforced concrete products, the concrete mixture is reinforced with randomly placed short steel fibres, which improves the mechanical characteristics of concrete, and due to these properties, it is better suited for the manufacture of structural elements that work in tension and bending.

The purpose of the research is to determine the optimal percentage of dispersed steel fibre reinforcement for the manufacture of reinforced concrete structures that must operate under complex stress-strain conditions. To solve this problem, concrete and fibre-reinforced concrete specimens were manufactured and tested: cubes, compression prisms, and tensile prisms. The technology of manufacturing experimental specimens with a given percentage of reinforcement and their testing is described, as well as the results of testing concrete specimens. A graph of average stress-strain values for testing concrete prisms in compression with a given percentage of dispersed reinforcement is constructed and described, and the process of their destruction is described. The conclusions of the experimental studies are presented.