Use of Activated Mineral Powders to Improve the Strength of Asphalt Concrete Pavements

Abstract

This study investigates the scientific and practical aspects of improving the performance of asphalt concrete pavements through the use of activated mineral powders. Particular attention is given to the role of mineral fillers in asphalt mixtures, as well as to the mechanisms of their mechanical and chemical activation and the resulting physicomechanical transformations. The findings indicate that activated mineral powders significantly enhance compressive strength, shear resistance, moisture stability, and temperature resistance of asphalt concrete. These improvements are attributed to increased surface activity, enhanced adhesion between bitumen and mineral particles, and the formation of a denser microstructure. Furthermore, under the continental climatic conditions of Uzbekistan, the application of activated mineral powders contributes to extending pavement service life and reducing overall maintenance and lifecycle costs.