Technology for producing modified polymer sulfur bitumen and its properties

This study presents the development of a technology for producing modified polymer-sulfur bitumen, intended for use as a binder in asphalt concrete for road and pavement construction. The main objective of the research is to improve the heat resistance, durability, and mechanical performance of asphalt pavements operating under high-temperature climatic conditions. The modification process involves incorporating sulfur and polymer additives into bitumen at controlled temperatures to enhance its structural stability. Experimental tests were conducted to investigate the influence of various modifiers, including polyethylene, polyethylene wax, and complex esters, on the physical and mechanical properties of the resulting polymer-sulfur bitumen. The study reveals that an optimal composition containing 3 % polyethylene wax (M2 modifier) significantly increases softening temperature and viscosity, indicating improved resistance to deformation and high thermal loads. The obtained results confirm that polymer-sulfur modification is an effective method to produce cost-efficient, durable, and environmentally sustainable binders for hot climate regions such as Uzbekistan.