Experimental Investigation on a Surface Treatment Technique to Enhance the Performance of Calicut Tile Aggregates

Abstract

The acceleration of urban development has noticeably escalated construction activities and the requisition for concrete, which predominantly depends on natural aggregates. In light of the finite access to these natural resources, investigative alternate materials that preserve the mechanical robustness of concrete is imperative. Scholarly investigations reveal that the incorporation of Calicut Tile Aggregates (CTA) as a renewable substitute for Natural Coarse Aggregates (NCA) in concrete compositions up to 40% of NCA is feasible with negligible detriment to performance. The objective of the present study is to enhance the properties of CTA through a surface treatment technique, specifically a cement sand coating, to amplify its compatibility and adhesion with the cement matrix. The methodology encompasses immersing the fragmented CTA in water for 24 hours, followed by the application of a coating of a mix of one part cement to two parts sand, and subsequently curing the coated aggregates for 28 days. The proposed treatment has been shown to enhance the physical and mechanical properties of CTA, endorsing its application as a sustainable construction aggregate. Experimental outcomes indicate that the processed CTA exhibits an enhanced specific gravity, diminished water absorption rate, and enhanced mechanical performance. Comparative analyses were conducted on concrete specimens utilizing various compositions: entirely NCA, untreated CTA and treated CTA, with partial substitutions at increments of 20% and 40%. These examinations disclosed that treated CTA showcased an improvement in compressive strength and energy absorption capacity. Consequently, the application of treated CTA addressed the intrinsic limitations of untreated CTA, potentially enhancing the ductility and resilience of the resultant composite material.