COMBINED FIBER-REINFORCED CONCRETE INVESTIGATION OF STRENGTH AND WEAR RESISTANCE

Abstract

Fiber reinforced concrete, roads, airports, fiber.

This paper presents the results of an experimental study on the strength and wear resistance of combined fiber-reinforced concrete intended for use in rigid pavement structures. The relevance of the research is обусловлена the growing demand for durable pavement materials capable of withstanding intensive traffic loads, repeated mechanical impacts, and aggressive environmental influences. Conventional cement concrete, despite its high compressive strength, is characterized by limited crack resistance and insufficient resistance to abrasion, which often leads to premature deterioration of rigid pavements. The study focuses on the effect of combined fiber reinforcement, achieved through the simultaneous use of fibers of different types and mechanical properties, on the formation of the mechanical and performance characteristics of concrete composites. The synergistic interaction of fibers with different geometries, elastic moduli, and bonding mechanisms contributes to improved stress redistribution within the cement matrix and inhibits the initiation and propagation of microcracks at early stages of loading. Experimental investigations included the evaluation of compressive strength, flexural strength, and wear resistance of combined fiber-reinforced concrete compared to reference compositions without fibers and with single-type fiber reinforcement. Special attention was paid to the behavior of the material under conditions simulating operational loads typical for rigid pavements of highways, airfields, industrial floors, and logistics terminals. The obtained results demonstrate that combined fiber reinforcement significantly enhances crack resistance, abrasion resistance, and overall durability of concrete, particularly under conditions of cyclic loading and exposure to aggressive media. The findings confirm the feasibility and effectiveness of using combined fiber-reinforced concrete in rigid pavement structures. The improved performance characteristics of the material make it possible to increase the service life of pavements, reduce maintenance costs, and enhance operational reliability. The results of the study can be applied in the design and construction of rigid road and airfield pavements with increased requirements for strength, wear resistance, and long-term durability.

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