Efficiency of Using Fiber Reinforcement and Modifying Admixtures in Concrete for Rigid Pavements
DOI:
https://doi.org/10.36910/6775-2410-6208-2026-15(25)-25Keywords:
fiber-reinforced concrete (FRC), road pavements, airfield pavement, reinforcing fiber, strength, compressionAbstract
The paper presents the results of an experimental study of the mechanical properties of fiber-reinforced concrete incorporating various types of dispersed reinforcement, including steel, polypropylene, glass, and basalt fibers. The aim of the study is to evaluate the influence of fiber type and dosage on the compressive, axial tensile, and flexural strength of concrete, as well as on its crack resistance and deformability. The main advantages of fiber-reinforced concrete include reduced labor intensity of conventional reinforcement works, improved operational reliability of structures, and the integration of reinforcement, mixing, and placing processes into a single technological operation.
The experimental program included testing concrete cubes in compression, prisms in axial tension, and prisms in flexure. The study was carried out using methods of mathematical design of experiments, which made it possible to reduce the number of tests while ensuring high reliability of the obtained results. It was established that the incorporation of fibers increases the strength, ductility, and crack resistance of concrete, while the degree of improvement depends on the physical and mechanical properties of the fibers.
Steel fiber provided the greatest increase in tensile and flexural strength due to its high modulus of elasticity and its ability to effectively resist tensile stresses. Polypropylene fiber improved crack resistance, reduced shrinkage cracking, and enhanced the resistance of concrete to aggressive environmental conditions. Glass and basalt fibers contributed to increased flexural strength and improved durability owing to their high corrosion resistance and good adhesion to the cement matrix.
The obtained results confirm the effectiveness of using different types of fibers to improve the mechanical characteristics of concrete and substantiate the feasibility of applying fiber-reinforced concrete in road construction, transportation infrastructure, and other structures subjected to intensive loading, long-term service, and adverse environmental effects
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References
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