COMPARATIVE ANALYSIS OF MODERN STUDIES ON FIBER-REINFORCED CONCRETE FOR MONOLITHIC CONSTRUCTION: EFFECT OF FIBER TYPE ON THE STRUCTURE, STRENGTH, AND DURABILITY OF CEMENT COMPOSITES

Abstract

This paper presents a comparative analysis of domestic and international studies devoted to the development and application of fiber-reinforced concrete (FRC) for monolithic construction. The results of investigations on basalt, polypropylene, steel, and synthetic macrofibers used for dispersed reinforcement of cement composites are reviewed. The influence of fiber type, length, and dosage on compressive and flexural strength, crack resistance, deformability, impact toughness, shrinkage behavior, and durability of concrete is analyzed. Particular attention is paid to studies concerning fine-grained fiber-reinforced concretes, self-compacting fiber-reinforced concretes, and composite materials intended for monolithic construction. Based on the analysis of published dissertation studies, it has been established that the incorporation of basalt fibers increases flexural strength by up to 40–60%, crack resistance by up to 70%, and reduces shrinkage deformation by 15–35%. The use of synthetic macrofibers significantly improves the energy absorption capacity and operational reliability of concrete structures. It is shown that the optimum fiber content for most types of fibers ranges from 0.5 to 2.0% by cement mass or from 0.1 to 1.5% by volume of the mixture. The study identifies promising directions for future research related to the development of high-performance and self-compacting fiber-reinforced concretes for application under hot and arid climatic conditions.