Recycled steel and its role in sustainable construction

The construction sector is under increasing pressure to adopt sustainable practices that minimize environmental degradation and resource depletion. This research explores the mechanical and durability performance of M30-grade concrete reinforced with 1% recycled steel fibers derived from demolished RCC structures. The study utilized standard IS and ASTM testing protocols to evaluate compressive strength, split tensile strength, flexural strength, water absorption, porosity, and corrosion resistance over 7, 14, and 28-day curing periods. Results revealed significant performance enhancements, including a 47.9% increase in compressive strength, 55% in tensile strength, and 74.2% in flexural strength. Durability indicators also improved, with reductions in water absorption, porosity, and corrosion current by 40.4%, 25.8%, and 17.3%, respectively. The findings confirm that recycled steel fibers not only improve structural integrity but also contribute to circular economy principles by diverting waste from landfills and reducing reliance on virgin materials.