Experimental Study on Self Compacting & Self-Curing Concrete using Recycled Aggregates with Silica Fume and Sap Agent

This study investigates the performance of self-compacting and self-curing concrete (SCC & SCCu) using waste recycled coarse aggregates, silica fume, and sodium polyacrylate (SAP) as additives. SCC offers high workability and durability, while self-curing technology addresses the challenge of proper hydration, especially in inaccessible areas or water- scarce regions. Experimental investigations were carried out on M30 grade concrete, with varying percentages of silica fume (0.1–0.25%) and SAP (0.4– 1%). Recycled aggregates replaced conventional coarse aggregates in selected mixes. Key properties such as compressive, tensile, and flexural strengths, as well as fresh concrete characteristics (slump flow, L-box, Vfunnel, and J-ring tests), were evaluated. Results confirmed that optimal performance was achieved with 0.2% silica fume and 0.8% SAP, particularly in recycled aggregate concrete, enhancing mechanical performance and sustainability.