Assessment of the aging stability of asphalt concrete based on bitumen modified with local materials during the preparation, laying and compacting processes

Bitumen, as a primary component of asphalt concrete mixtures, serves as a key binding material in road construction. Considering that the majority of Uzbekistan’s roadways consist of asphalt concrete pavements, the durability of asphalt pavement is largely determined by the quality and longevity of bitumen. Bitumen undergoes ageing not only during prolonged exposure to oxygen, sunlight (ultraviolet radiation) and traffic loads, but also during the production process itself. This paper examines the mechanisms of bitumen ageing, particularly focusing on how short-term ageing affects the physical and mechanical properties of bitumen. Conventional BND 60/90 bitumen and polymer-modified bitumen were compared before and after short-term ageing in a rolling thin film oven, and their softening point, ductility, penetration and mass loss were measured.

Hali tarjima qilinmagan