A Study on Demolished Concrete by Partial Replacement of Coarse Aggregate

There is a large amount of demolished waste generated every year in India and other developing countries. Demolished waste includes concrete blocks that can be recycled into stone aggregates through pre-screening, crushing, screening, and separating of aggregates. In order to promote the reuse of construction waste, it is necessary to achieve the three basic concepts: (1) Assurance of safety and quality, (2) Decrease of environmental impact, (3) Decrease of cost-effectiveness of construction. The experimental investigations are carried out to evaluate the effect of partial replacement of coarse aggregate by demolished waste on compressive strength and workability of demolished concrete. We have taken demolished concrete (recycled aggregates) in the ratio of 25%, 50%, 75%, and 100% by the weight of the coarse aggregates. The concrete cubes were casted by that recycled aggregates then further tests were conducted such as workability, compressive strength on that demolished concrete. Therefore, the test results obtained are found to be comparable with standard or conventional concrete.