An Experimental Investigation On Strength Properties of Concrete with Partial Replacement of Cement and Coarse Aggregate by Silica Fume and Recycled Aggregate

Abstract

Construction-Demolition waste is the major part of solid waste, which contributes almost 30% of solid waste every year and creates lot of environmental issues. Now a days building material crisis in construction industry also increasing every year. Use of Construction-Demolition waste in construction industry would be the sustainable solution for this problem. Use of C&D waste in concrete have so many advantages in construction industry and also solve lot of environmental problems and also increase the economic contribution of construction industry in countries development. Use of C&D waste in concrete would lead to eco-friendly concrete with sustainable development. The main moto of the present project is to use Construction demolition waste-Recycled aggregates in concrete without compromising the properties of concrete. The physical properties such as specific gravity, water absorption and sieve analysis of construction demolition waste-Recycled aggregates and natural aggregates are investigated and the natural aggregates are replaced by Construction demolition waste-Recycled aggregates in concrete in different proportions (i.e., 0%, 20%, 40% ,60%,80% and 100%). The properties of hardened concrete such as compressive strength, split-tensile strength, flexural strength and Non-destructive tests (Rebound Hammer, Ultrasonic Pulse velocity test) is investigated and compared with the conventional control concrete. The results are concluded that the strength properties of concrete won’t affected up to 40% replacement of Construction demolition waste Recycled aggregates.