PHYSICAL AND MECHANICAL PROPERTIES OF RECYCLED AGGREGATES AND TREATED RECYCLED AGGREGATES

Abstract

Construction and Demolition(C&D) waste is the major production of total solid waste production in the world and it is most of them used in landfills. After enormous research work by various researchers made on reusing (C&D) waste, proposals are made for the possibility of reusing such waste as aggregates in new concrete with and without suitable treating. In this paper, an attempt is made on the possibility of using C&D waste for concrete in place of natural coarse aggregates known as recycled coarse aggregate (RA). A brief overview and comparison studies are made on physical and mechanical properties of recycled aggregate with and without treatment for maximum utilization of recycled aggregate in concrete. Recycled aggregate was treated with epoxy resin to reduce the water absorption. Control concrete mix is prepared by using natural coarse aggregate and test concrete mixes are prepared replacing natural aggregate by recycled coarse aggregates with and without treatment in different percentages (20%, 30%, 40% and 50%).
Tests are conducted on all concrete mixes for determining workability of fresh concrete and mechanical properties of hardened concrete like compressive strength, split tensile strength, flexural strength. The tests results are analyzed and presented.