Analysis of the Properties of Asphalt Granulate as Raw Materials for Obtaining Organic Mineral Composites

Increasing and maintaining the pace of construction and repair work associated with the development of the highway network, as well as improving the quality of communication between subjects and transport hubs, requires a huge amount of resource consumption, and, accordingly, creates a significant burden on the country’s economy. One of the rational solutions in the road construction industry, which allows reducing the cost of raw materials, is the reuse of materials from existing highway structures. The most common options in both domestic and foreign practice is the use of regeneration technologies for the quantitatively predominant asphalt concrete road surfaces. However, when reusing asphalt concrete, in order to establish the recipe and technological features of the designed composites, it is necessary to evaluate the properties of asphalt concrete after wear and the possible mutual influence of the components used in its composition on the formation of the final properties of new composites. In this regard, the presented work is devoted to the analysis of a complex of properties of asphalt granulate samples and the establishment of patterns of their changes depending on the composition and service life. Based on the studies conducted, it was established that the composition of the mineral part of asphalt granulate and the amount of organic binder are within the standardized ranges. Noteworthy is the decrease in the physical and mechanical characteristics of the mineral part with an increase in the service life of asphalt concrete for more than five years, as well as a change in the composition of the organic binder, leading to a decrease in its relaxing ability. Depending on the composition and properties of asphalt granulate, options for its further use are proposed.