Experimental Analysis On Recycled Coarse Aggregates In Concrete

Abstract

The rapid growth of the construction industry has led to an increased demand for natural aggregates, causing environmental degradation and depletion of natural resources. To promote sustainable construction practices, the utilization of Recycled Coarse Aggregates (RCA) derived from construction and demolition (C&D) waste has gained significant attention. This study aims to analyze the mechanical and durability properties of concrete prepared with varying proportions of RCA as a full replacement for natural coarse aggregates. Experimental investigations were carried out on concrete mixes containing 100% RCA. Standard tests including compressive strength, split tensile strength, flexural strength, and water absorption were conducted to assess performance. The results indicate that concrete incorporating RCA exhibits satisfactory strength characteristics up to a certain replacement level, with marginal reductions compared to conventional concrete. The inclusion of RCA also contributes to reduced carbon footprint and promotes waste minimization in the construction sector. The study concludes that RCA can effectively be used in structural and non-structural concrete applications, provided appropriate mix design and treatment techniques are adopted. This research highlights the potential of recycled aggregates as a sustainable alternative in modern concrete production, aligning with the principles of circular economy and green construction.