Abstract
The use of household polymer waste in bitumen modification is one of the promising areas that allows providing the road surface with maximum resistance to fatigue failure, resistance to temperature changes in daily and seasonal cycles and a direction in solving environmental problems. In addition, using polymer waste can solve the problem of the increased cost of bitumen modified with polymers. In this research work, the compositions and physical-chemical characteristics of bitumen, polymer-bitumen binders and coal coke are studied. The detailed chemical composition of coal coke was studied using IR spectroscopy and thermogravimetric analysis. Addition of microdispersed coke during bitumen modification shows improvement of the characteristics of the obtained product similar to polymer-bitumen binders. Polymer-bitumen binder with addition of polymer waste and polymer modifier Elvaloy meets the requirements of ST RK 2534-2014 for BMP 50/70 in terms of its main indicators. During the process of bitumen modification with polymer waste, polymer particles physically react with high-molecular components (asphaltenes, resins and polyaromatic compounds), which affects the physical and mechanical properties of the bitumen binder: the softening temperature increases, the penetration and ductility values decreased. Addition of microdispersed granulated coke powders for modification of road bitumen meets the requirement of PBB 40 according to GOST R 52056-2003.