The aim and objectives of the study are to establish the influence of different dosages of basalt and polypropylene fibers in a wide range of concentrations on the main physical and mechanical indicators of road cement concrete based on Portland cement with its partial replacement by ground blast furnace slag and based only on clinker Portland cement. The article presents the results of the influence of different dosages of basalt fibers and polypropylene fibers in a wide range of concentrations on the physical and mechanical properties of road cement concrete. It was found that the introduction of polypropylene fibers and basalt fibers has almost no effect on the compressive strength of cement concrete. Based on experimental studies, the concentration of polypropylene and basalt fibers was determined, which corresponds to the maximum tensile strength in bending of cement concrete. This concentration is 0.9-1.0 kg/m3 of polypropylene fiber and 15.0-16.0 kg/m3 of basalt fiber. A change in the average density of cement concretes with the addition of polypropylene fibers and basalt fibers was established. The introduction of the optimal amount of polypropylene fiber (fiber) leads to higher values of the tensile strength parameter in bending of road cement concrete compared to cement concrete based on basalt fiber. The change in the strength indicators of cement concrete based on Portland cement partially replaced by ground slag with the addition of the optimal amount of polypropylene fibers and basalt fibers is similar to the change in these indicators of cement concrete based on purely clinker Portland cement.

basalt fibers, bending, concentration, strength, polypropylene fiber, compression, cement concrete

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