Demolition Waste as Cement Replacement in Concrete

Demolition of old structures to make way for new and modern ones is common features in metropolitan areas due to rapid urbanization. Very little demolished concrete is recycled or reused. Due to strict environmental laws and lack of dumping sites in urban areas, demolished waste disposal poses problems. In the present work, experimental investigations were carried out to evaluate the effect of partial replacement of regular cement in concrete by different parts of demolished wastes. For the study, concrete cubes were cast by replacing part of cement with recycled powder. The cubes were tested at 7 and 28 days. The compressive strength of these cubes is compared with the strength of referral concrete (Design mix concrete, M25). Test results show that behavior of recycled waste concrete with partial replacement of cement (20%) by recycled waste powder is almost similar to that of referral concrete.