Partial Replacement of Coarse Aggregate by Demolished Concrete Aggregate

Growing awareness of the substantial ecological changes calls for sustainable advancements in everysector. Since natural fine and coarse aggregates make up 70% to 80% of the volume of concrete, themanufacturing of concrete is one of the biggest users of natural resources. It is obvious that the enormousvolume of concrete produced by the expanding building sector has a substantial influence on theenvironment and the usage of natural resources. As a result, it became clear that researchers should look intousing recycled materials to replace the limited natural resources. This study looked at replacing some of thefine and coarse particles in concrete using trash from destroyed concrete structures and used for concretingfor a mix proportions of M30 as a replacement for natural coarse aggregate in proportions of 0%, 20%, 40%,60%, 80%, and 100% by weight of coarse aggregates, six concrete mixes containing 42 cube specimens and12-cylinder specimens were casted and the various tests to be conducted on concrete such as compressivestrength, split tensile strength at ages of 7, 14, and28 days. The results showed that the concrete's strengthincreased up to 60% replacement, but then it began to decrease beyond 60% replacement. The 60%replacement concrete was found to have the best strength. However, more research is required to ascertainthe impact on durability and enhancement on workability.