Utilization of Recycled Plastic Waste in Road Construction

The utilization of recycled plastic waste in road construction has emerged as an innovative and sustainable solution to address environmental pollution and enhance pavement performance. Rapid urbanization and increasing plastic consumption have resulted in serious disposal challenges due to the non-biodegradable nature of plastics. This study focuses on the use of waste plastic materials such as polyethylene, polypropylene, and polystyrene as modifiers in bituminous mixes to improve the physical and rheological properties of pavements. The shredded plastic is coated over aggregates and mixed with hot bitumen, resulting in enhanced strength, durability, and resistance to deformation. Laboratory tests such as penetration, softening point, viscosity, Dynamic Shear Rheometer (DSR), and Marshall Stability tests were conducted to evaluate performance characteristics. The results indicate significant improvements in stability, stiffness, water resistance, and service life of pavements with optimum plastic content. Additionally, the use of titanium dioxide as a smoke absorbent contributes to reducing vehicular pollution. This approach not only reduces construction costs but also promotes eco-friendly waste management practices and sustainable infrastructure development.