Abstract

 
 
 There is an increase in motorization worldwide, which in turn requires the construction of high-quality roads and highways. In both new construction and reconstruction of the pavement, large volumes of natural mineral materials are used, placing a large technogenic load on environmental objects during their extraction. In a number of regions of the Russian Federation, there are not sufficient volumes of conditioned raw materials for the production of high-quality composite building materials, such as asphalt concrete and cement concrete mixtures. The use of industrial waste in the composition of building materials addresses this issue while both solving environmental issues and reducing the cost of road construction. This article shows that developed countries successfully use the resource potential of waste in the production of building materials. This article proposes the use of waste foundry sand as the mineral raw material in the production of asphalt concrete. The article presents research on the following: geometric shape, elemental composition of the surface of the particles of the waste foundry sand; bitumen capacity; and the adhesion of bitumen. Based on the obtained data, a technology was developed for producing hot sandy asphalt concrete in which the waste foundry sand is used as a fine mineral aggregate. Physico-mechanical properties of the obtained samples of asphalt concrete satisfy the requirements established in GOST for asphalt concrete.
 Keywords: waste foundry sand, asphalt concrete, industrial material, elemental composition, bitumen
 
 
Highlights
At present, enterprises of the Russian Federation generate large volumes of technogenic waste, which raises the issue of their disposal
The use of the resource potential of industrial wastes makes it possible to reduce the technogenic load on environmental objects by reducing the volumes of their accumulation and the volumes of extraction of natural raw materials, and allows reducing the cost of the final product by reducing the cost of raw materials
Technologies are used to replace natural fine mineral aggregate in the composition of concrete mixtures on waste foundry sand (WFS), which significantly reduces the consumption of natural mineral raw materials and the cost of the final product
Summary
Enterprises of the Russian Federation generate large volumes of technogenic waste, which raises the issue of their disposal. One of the main consumers of industrial waste can be the construction industry, which is a large-capacity consumer of mineral raw materials of various compositions.
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