ACTIVE MINERAL ADDITIVES FOR MODIFYING BITUMEN AND ASPHALT CONCRETE
Asphalt concrete in road surfaces and road foundations is strongly influenced by deformation forces from heavy traffic and the climatic influence of the environment. To increase its durability, it must have high shear strength, deformability, water and frost resistance, wear resistance and other qualities. The properties of asphalt concrete depend on the qualitative and quantitative composition of the asphalt concrete mixture, the methods of its preparation and placement, the use of various modifying additives to improve the parameters of the properties of the bitumen used, the correct design of the asphalt concrete composition and other technological factors. A more effective way to improve the quality of asphalt concrete is to modify its bitumen composition with additives. This article analyzes the properties of asphalt concrete when modifying its bitumen composition with various active mineral additives. Ground substances of different chemical composition are used as active mineral additives to bitumen in asphalt concrete; they significantly change the properties of bitumen to increase the durability of asphalt concrete during the operation of highways.