A Review on sustainability of Recycled Construction Aggregates

Abstract

Construction industry is based on the adequate supply of raw materials. The rapid urbanization and industrialization have put strain all resources. This ever-increasing demand and the shortage of natural aggregates has put a need to find new sources or alternatives for aggregates. Recycling old materials and reusing them again can also prove to be an effective and economical solution for shortage of aggregates. It will protect natural resources and reduce disposal issues of construction and demolition waste. Several attempts are made in this regard by replacing natural aggregates by recycled construction aggregates (RCA) in different proportions by weight and prepares concrete mix is tested for fresh and hardened properties. All attempts although are successful enough to promote the use of RCA but the results reveal concrete with reduced strength or additional admixtures is required to attain original strength. Thus it increases overall construction cost. Present review is made to put forward these issues with RCA and efforts made to develop cost-effective solution to find sustainable recycled aggregates.