Abstract: The rising demand for durable and high-performance pavements has led to the exploration of polymer-modified bitumen to overcome conventional asphalt's limitations. This study investigates the effects of incorporating different polymers—including Ethylene-Vinyl Acetate (EVA), Low-Density Polyethylene (LDPE), High-Density Polyethylene (HDPE), and Ethylene-Propylene-Diene Monomer (EPDM)—on the physical and mechanical properties of bituminous mixes. The primary objective is to enhance asphalt performance under varying environmental and loading conditions, addressing issues such as rutting, thermal cracking, and premature aging. The research follows a systematic experimental approach involving standard tests such as the Marshall Stability Test, Los Angeles Abrasion Test, and Aggregate Impact Test. Bituminous mixtures were prepared with varying bitumen contents, and their behaviour was analysed in terms of stability, flow, density, voids, and binder content. Results indicate that polymer modification significantly improves the structural integrity and fatigue resistance of asphalt mixes, making them more suitable for modern road traffic demands. This study concludes that adding selected polymers at 5%, 10%, 15%, 20%, and 25% enhances the performance of asphalt pavements and contributes to sustainable road construction by enabling waste polymers. The findings support the adoption of polymer-modified bitumen in infrastructure development for improved longevity and cost-efficiency.

Keywords: Polymer Modified Bitumen; Asphalt performance Marshall Stability Test.

| DOI: 10.17148/IARJSET.2025.12606