The Use of Mineral Powders of Various Nature to form the Structure of Asphalt Concrete

Abstract

It is known that a significant role in regulating the process of interaction of the binder with mineral surfaces belongs to mineral powder. Due to the highly developed specific surface area, the mineral powder helps to increase the number of contacts between the structure-forming components of asphalt concrete. The main purpose of mineral powder is to transfer the binder from a bulk state to a film state. In this state, the binder acquires increased characteristics, which, thanks to the stabilizing action of the mineral powder, change less under the influence of temperature. Together with the binder, the mineral powder forms a structured dispersed system that acts as an asphalt binder. The greater the specific surface of the mineral powder, the greater its structuring effect on the binder and asphalt concrete. The purpose of this work was to determine the degree of mineral powders impact, depending on their chemical-geological composition, on the asphalt-polymer concrete properties and to reveal the differences between the features of asphalt concrete and asphalt-polymer concrete.