Analysis and Generalization of Existing Experience Regarding Application and Influence of Reinforcing Microfibers on Properties of Asphalt Concretes

Abstract

Introduction. Excessive axle loads and environmental influences cause permanent deformation, cracking, residual deformations in the form of rutting, fatigue and shortening the service life of highways. The use of reinforcing microfibers (fibers) in the asphalt concrete mixture is gaining popularity, as it can improve the mechanical properties of the asphalt concrete layers of the road structure and increase its strength and durability. Problems. Based on the literature analysis, it was established that the use of fiber (fibers) can improve the properties of asphalt concrete. Goal. It consists in the analysis and generalization of the existing experience regarding the use and influence of fiber on the properties of asphalt concrete. Results. An analysis of the experience of using fiber and the influence of fiber on the properties of asphalt concrete, in particular natural fiber, synthetic fiber, glass fiber, metal fiber, and mineral fiber, was conducted. Conclusions. The review highlights the potential benefits of using fiber in an asphalt mixture, including improved stiffness and cracking resistance, reduced rutting, and increased fatigue resistance. However, the effectiveness of fiber in improving the mechanical properties of asphalt concrete is influenced by various factors such as fiber type, content, and distribution. Further research and studies are needed to optimize fiber selection, refine mixture design procedures, improve fiber introduction technologies into the asphalt concrete mixture, and conduct environmental and economic impact assessments.