Comparative Performance of Asphalt Binders and Sulfur-Waste Mixes Containing SBS and ABS Polymers

This study explored the use of sulfur waste (SW) as a mineral filler in hot mix asphalt (HMA) modified with styrene-butadiene-styrene (SBS) and acrylonitrile-butadiene-styrene (ABS) polymers to enhance the asphalt’s performance and sustainability. A series of laboratory tests were conducted, including Marshall stability and flow, indirect tensile strength (ITS), Kim test, semicircular bending (SCB), and others, to evaluate the mechanical and rheological properties of the modified asphalt mixtures. The results showed that the addition of SBS and ABS significantly improved the viscosity, stiffness, and resistance to deformation at both high and low temperatures, with SBS offering better high-temperature performance, making it suitable for heavily trafficked roads. ABS, on the other hand, provided a more cost-effective solution for areas with moderate climatic conditions. In addition, the modified mixtures exhibited enhanced moisture resistance and fracture resistance, demonstrating better durability compared to the control mixture. Life-cycle cost analysis further confirmed the economic advantages of using SW with SBS and ABS, reducing asphalt production costs. In conclusion, SBS is recommended for high-traffic, high-temperature regions, while ABS is more suitable for cost-sensitive projects or moderate climates, offering a balance between performance and cost.