Применение гидролизного лигнина в качестве стабилизирующей добавки для щебеночно-мастичного асфальтобетона

Abstract

The experience of using hydrolytic lignin in Russian and foreign literature allows it to be considered as a stabilising additive in the production of stone-mastic asphalt concrete mix. For thispurpose, it is necessary to conduct laboratory tests of raw materials and asphalt concrete mixtures with different percentages of hydrolytic lignin. Also, on the basis of the obtained results, to draw a conclusion about the use of waste from the hydrolysis industry for the building of the top layers of stone-mastic asphalt concrete coatings at the construction sites, reconstructions, major repairs and highways. Crushed stone-mastic asphalt concrete is an artificial road-building material, consisting of a mixture of mineral materials (crushed stone, sand from crushing siftings and mineral powder), oil road bitumen, used as a binding and stabilising additive for re-sistance to delamination and uniformity of crushed stone-asphalt concrete. Hydrolytic lignin is a polymer that makes up the walls of plant cells. The use of hydrolytic lignin as a stabilising additive for crushed stone-mastic asphalt concrete mixture allows to stabilise this mixture, to increase the adhesion of bitumen to the surface of the mineral material and to improve the physical and mechanical properties of crushed-stone-asphalt concrete. Based on the data obtained, the composition of crushed stone-mastic asphalt con-crete was developed using a stabilising additive from hydrolytic lignin. The use of hydrolytic lignin as a sta-bilising additive will improve the performance properties of crushed stone-mastic asphalt concrete, as well as reduce the cost of construction, reconstruction and overhaul of highways.