This paper studies the effect of recycled fillers on the properties of waterproofing mastics made for the tough climatic conditions in Siberia. Currently mineral powders from carbonate rocks are used for mastics production. However, these rocks are not located in all regions of Russia Federation and the production of mineral filler powders from these rocks is often associated with great production costs. The aim of this study is to develop bitumen mastics with reduced overall production costs that are able to comply with GOST standards. The experiment was conducted to provide insight on the recycled fillers (RF) in reliability, durability, climatic, freezing resistance of bitumen mastics. The method we applied involved in classic (with limestone filler) bituminous mastics comparison with recycled mineral fillers the tailings of neutralization (Norilsk) as well as the waste of barite production (Chernogorsk). A laboratory test method for bituminous mastics was used so what we could ascertain their properties like softening temperature, penetration value, low-temperature extensibility, Fraas breaking point, Modulus of elasticity. Results indicate that the mastics freezing resistance have increased with combined use of the recycled mineral fillers and thermoelastoplastic elastomer (TPE) DST-30. They recognize the possibility of waste utilization as alternative fillers in bitumen mastics that could lead to cost reduction effect. Developed mastic compositions recommended for use in commercial construction which contribute to the goals of waste processing and recycling in the Krasnoyarsk Territory.

Keywords: stone-mastic asphalt concrete, industrial waste, nepheline sludge, mineral powder, stabilizing additive, cord fiber waste, bitumen, road surfaces

Crushed stone-mastic asphalt concrete is a more durable material compared to traditional asphalt concrete. But for its exploitation, high-quality mineral powders and bituminous carriers are needed to prevent bitumen from flowing out of the composition. Today, the carbonate rock powders and bituminous carriers from natural cellulosic fibers are widely used. However, many Russian Federation regions, including the Krasnoyarsk Territory, are not provided with these materials, and they are also really expensive. The purpose of our work was to reduce the cost and improve the properties of crushed stone-mastic asphalt concrete. The task of the research was to develop gravel-mastic asphalt concrete compositions using the industrial waste from the Krasnoyarsk Territory. Nepheline sludge was tested which is the waste of the alumina plant in Achinsk and rubber crumb with inclusions of cord fiber of Chernogorsk in Krasnoyarsk Territory. The chemical composition and physical and mechanical properties of these wastes were studied. Gravel-mastic asphalt concrete compositions were made by using these wastes. The tests showed that the received compositions met regulatory requirements. The developed compositions were introduced by “Krasnoyarskavtodorom” on the Krasnoyarsk Territory roads. The economic effect of the waste usage is achieved through the exploitation of the local raw materials, which leads to a reduction of the transportation and energy costs.

Keywords: the crushed stone-mastic asphalt concrete, industrial waste, nepheline sludge, mineral powder, bituminant, rubber waste with corded fiber inclusions, crushed stone, sand Crushed stone-mastic asphalt concrete, industrial waste, nepheline sludge

The influence of grain composition and active mineral addition of microsilicasuspension on properties of dry concrete mix was considered. The selection of the method of production of paving slabs with allowance for technological modes of vibropressing technology was made. The optimum dose of microsilicasuspension, having positive effect on the concrete quality, was defined.

Keywords: grain composition, dry mix, process of hydration, microsilica, paving slabs, heavy concrete, compressive breaking strength, abrasion capacity