Sustainable Interlocking Concrete Paver Blocks from Recycled Road Demolition Waste: An Experimental Taguchi-Based Approach

Abstract

This study investigates the use of recycled road demolition waste as a partial replacement for fine and coarse aggregates in the development of sustainable interlocking concrete paver blocks. A Taguchi-based experimental approach was used to analyze the effects of varying the recycled aggregate contents and water-cement ratio on compressive strength, water absorption, and abrasion resistance. The results indicate that incorporating recycled waste materials significantly impacts the overall performance of the paver blocks. Regression analyses were conducted to develop predictive models, which demonstrated strong predictive capabilities and enabled the optimization of the mix design. The researchers recommend an optimum mix design comprising 20% recycled fine aggregates, 25% recycled coarse aggregates, and a water-cement ratio of 0.4, as this combination can provide high compressive strength, low water absorption, and improved wear resistance, ensuring the long-term sustainability and durability of the pavement system. The study highlights the potential for using recycled road demolition waste as a sustainable alternative to traditional pavement materials, contributing to the reduction of the construction industry's environmental impact.