Effect of recycled course aggregate from concrete debris on the strength of concrete

Abstract The paper investigates the fresh and hardened mechanical properties of a concrete mix produced with partial or full substitution natural aggregates recycled from demolition works crushed tested cubes laboratory. Recycled aggregate (RAC) is that has been made waste materials as coarse and/or fine aggregate. One taken demolished buildings in Iraq due to military operations on 2014 other Choosing wastes test laboratory source recycling would result reusing portion products production industry. This study presents an experimental performance contains replacement percentages are (0, 33.3, 66.7 100) %. Moreover, silica fume was used admixture for all concretes. Compressive indirect tensile strength were studied reference concretes at (28) days age, by testing cylinders specimens respectively. results showed compressive splitting decreased increased compared concrete. When added, those without fume.