CONDUCTING EXPERIMENTAL STUDIES ON DISPERSION-REINFORCED ASPHALT CONCRETE MIXTURES WITH BASALT FIBER

Abstract

Due to the increase in traffic intensity and environmental influences, most roads with asphalt concrete layers do not withstand the planned service life due to the presence of various types of damage, including residual deformations in the form of rutting, landslides, inflows, cracks, potholes. The use of microfibers in asphalt concrete mixtures performs a reinforcing function that improves the mechanical properties and characteristics of the road structure. The effectiveness of microreinforcement of asphalt concrete and its modification (microreinforcement) with short fibers has shown that the physical properties, characteristics and wear resistance of asphalt concrete can be improved by introducing fibers in a small amount. The effectiveness of this method and the reinforcing effect mainly depend on the nature of the fiber, which can be enhanced by special preparation of the fiber surface before use. By designing the asphalt concrete composition, a ratio of components (by mass or volume) is found that ensures the optimal structure and specified indicators of technical properties of asphalt concrete. From a huge number of possible composition options, the most rational ratio of components was selected, which more fully than others corresponds to the specific conditions of the production technology of asphalt concrete reinforced with basalt fiber and the work of the material in the structural layers of the road surface. The addition of fibers to asphalt concrete mixtures has significant potential to improve the properties and performance of the asphalt concrete mixture. By strengthening the asphalt concrete matrix, fibers increase rutting resistance, cracking resistance, and fatigue resistance. The use of asphalt concrete mixtures with reinforcing microfibers makes it possible to extend the service life of the road surface. The paper presents the results of experimental studies of dispersion-reinforced asphalt concrete mixtures and asphalt concretes with basalt fiber.