Volume 2 - Issue 3, May - June 2026

This study experimentally demonstrated that recycling concrete is an effective method for sustainably managing construction and demolition waste. Consequently, 48 standard concrete cube specimens were produced, cured, and subsequently crushed. Of these, 24 cubes were made from recycled aggregates, while the remaining 24 were created using virgin aggregates. The findings indicated that at elevated water/cement ratios, the compressive strength of recycled concrete is comparable to that of virgin concrete; however, at reduced water/cement ratios, the compressive strength of recycled concrete is significantly lower than that of virgin concrete. Specifically, at water/cement ratios of 0.5 and 0.6, the compressive strength ratio of recycled concrete to virgin concrete was 0.89 and 0.985, respectively, at a crushing age of 28 days, and 0.5 and 0.95, respectively, at a crushing age of 7 days. Furthermore, the slump and compacting factor tests indicated that the workability of the virgin concrete mix surpasses that of the recycled concrete.

Chukwuemeka Matthew Ibegbu,"Reusing Concrete from Construction and Demolition for Sustainable Structures" International Journal of Advanced Multidisciplinary Research and Educational Development, V2(3): Page(940-944) May-June 2026. ISSN: 3107-6513. www.ijamred.com. Published by Scientific and Academic Research Publishing.