Reuse of construction waste as coarse aggregate in concrete

Abstract

The recycling of construction waste as concrete aggregates is an important way to contribute to sustainable development. However, the use of recycled concrete aggregate (RCA) instead of natural aggregate influences the properties of concrete since it has high water absorption. Experimental studies were carried out on the improvement of RCA performance, especially to reduce water absorption. In this study, surface of RCA was coated with a mix of cement, rice husk ash (RHA) and water, so that its characteristics were improved. Concrete mixes were prepared using the treated recycled aggregates and physical properties of each concrete mix were studied.