Sustainable Enhancement of Geopolymer Concrete Durability Using Recycled Plastic Waste Additives

Abstract

This study investigates the potential of incorporating recycled plastic waste as an additive in geopolymer concrete to enhance its durability and sustainability. Key performance indicators—compressive strength, abrasion resistance, and water permeability—were evaluated for concrete mixes with varying proportions of plastic waste. Results indicate that the inclusion of recycled plastic significantly improves all tested properties compared to the control mix. Enhanced compressive strength, reduced mass loss due to abrasion, and lower permeability levels were consistently observed in the modified samples. These improvements highlight the potential of waste plastic to increase the mechanical and durability performance of geopolymer concrete, while simultaneously offering an environmentally responsible solution for plastic waste management. This research contributes to the advancement of sustainable construction practices by promoting circular material use and reducing reliance on conventional cementitious binders. Further studies are recommended to determine the optimal plastic dosage, evaluate long-term performance, and assess the economic viability of scaling this approach in real-world applications.