Mineral Powder in a Modern Design System of Asphalt Concrete

Abstract

Within the framework of this article, the potential raw material base for obtaining mineral powders for the production of asphalt concrete mixtures is analyzed. The main stages of structure formation in asphalt concrete in the process of interaction of a bitumen binder with mineral materials are considered. Within the boundaries of modern approaches to the design of asphalt concrete mixtures, an assessment of the current regulatory framework is carried out in relation to the requirements for the indicators of the properties of mineral powders and the sampling methodology for assessing their quality. According to the research, despite the increased attention to the characteristics of mineral powders, the requirements for the methodological approach to sampling mineral powder and the quality assessment of the binary system "bituminous binder - mineral powder" or asphalt binder, which is the most significant component of asphalt concrete, is currently weak elaborated in the normative documentation. In the light of modern approaches to the design system of asphalt concrete mixtures, including the methodology of volumetric-functional design, it is of interest to develop a qualitative and quantitative assessment of the effect of mineral powders of different nature on the structuring of bituminous binders and, as a consequence, a change in their rheological properties.

Research of the petroleum road bitumen modification process with secondary polyethylene terephthalate

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Improving the Bitumen Quality through the Comprehensive Polymer-Based Modification

“…Polymer modifying agents are one of the ways to solve these burning problems [1][2][3][4][5][6][7][8]. A small amount of polymer introduced into bitumen have a considerable impact on the bitumen quality parameters: they increase the softening temperature, reduce penetration and brittleness temperature, improve elasticity, cohesion and durability.…”