Sustainable materials in rigid pavement construction contribute to environmental protection and resource efficiency

The increasing demand for sustainable and durable construction materials in the field of transportation infrastructure has led to the exploration of alternative materials in rigid pavement construction. This research investigates the strength and durability characteristics of rigid pavement concrete incorporating Fly Ash, Ground Granulated Blast Furnace Slag (GGBS), and Natural Fibers as partial replacements and additives to conventional concrete. In this study, Fly Ash and GGBS were used as supplementary cementitious materials (SCMs) to partially replace ordinary Portland cement, while natural fibers such as bamboo, coconut & human hair were added to enhance the tensile strength and crack resistance of the concrete. Various mix proportions were designed and tested to evaluate the mechanical properties including compressive strength, split tensile strength, and flexural strength. Durability aspects such as water absorption, acid resistance, and sulfate resistance were also assessed under different curing conditions. The experimental results revealed that the partial replacement of cement with Fly Ash and GGBS significantly improved the workability and long-term strength of the concrete. The inclusion of natural fibers contributed to better post-cracking behavior and resistance against surface deterioration. An optimal mix was identified that offers a balanced improvement in both strength and durability properties, making it a viable solution for rigid pavement applications. This study highlights the potential of using industrial by-products and eco-friendly fibers in concrete to develop cost-effective, durable, and environmentally sustainable rigid pavements, aligning with modern infrastructure goals.