LOAD–DEFLECTION BEHAVIOR OF CONTINUOUS SCC BEAMS WITH RECYCLED COARSE AGGREGATES

Abstract

This study examines the load–deflection response of continuous self-compacting concrete (SCC) beams incorporating recycled coarse aggregates. Nine two-span beams with reinforcement ratios of 0.65–0.94% were experimentally tested using 50% and 100% aggregate replacement. Recycled aggregate beams showed slightly reduced stiffness and increased post-cracking deflections, while ultimate load capacities remained comparable, particularly for 50% replacement. The influence of recycled aggregates was more pronounced at lower reinforcement ratios. Experimental ultimate loads exceeded EC2 and ACI 318 predictions, indicating effective moment redistribution and ductile behavior. The results confirm the structural applicability of high-quality recycled aggregates in continuous SCC beams.