Fine-grained fiber concrete using polypropylene and basalt fibers

The purpose of the study is to evaluate the effect of fibers on the bending strength of fine-grained concrete samples. The results of experimental studies of polypropylene and basalt fibers for dispersion reinforcement of concrete are considered. The strength characteristics of fiber concrete of different compositions have been determined. The regularities of the influence of fiber type and concentration on the strength characteristics of fiber concrete are revealed. The results of determining the bending strength of fine-grained fiber concrete without adding fiber (control composition) and with the addition of polypropylene fiber 0.1, 0.5, 1.5, 2.5% of the weight of cement and basalt 0.05, 0.1, 0.2, 0.5% of the weight of cement are presented. It is shown that the optimal limits of the introduction of polypropylene fiber in the mixture of fine-grained concrete can be considered 0.5 % by weight of cement. The introduction of basalt fiber in the mixture of fine-grained concrete in an amount of 0.1 % of the weight of cement can increase the bending tensile strength.