Experimental Study on Sustainable Mortar Using Recycled Tyre Rubber Aggregates
Abstract
The characteristics of cement mortar are investigated experimentally in this study by substituting discarded tyre rubber crumb for some of the fine aggregate. The primary objective is to address environmental concerns related to tyre disposal while promoting sustainable construction practices. Mortar mixes were prepared with varying percentages of rubber crumb (0%, 3%, 6%, 9%, and 12%) as a substitute for sand. Efficiency, strength of compression, and water absorption properties were tested at various curing times. Results demonstrated that the inclusion of rubber crumb reduces the density and enhances ductility of the mortar. However, a gradual decrease in compressive strength was observed with increasing rubber content. An optimum replacement level was identified around 6%, where acceptable strength and improved durability properties were achieved. Additionally, rubberized mortar showed variations in water absorption behavior compared to conventional mortar. The study concludes that waste tyre rubber can be effectively utilized in non-structural applications. This approach contributes to waste management and supports eco-friendly construction materials.
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