An Experimental Investigation of Using Recycled Aggregate in Concrete

One of the major challenges of our present society is the protection of environment; with respect to this some of the important elements are reduction of natural raw materials and consumption of waste materials. The recycled aggregate sample of size 20mm which is the maximum size of aggregate in reinforced cement concrete is collected from demolished structures in our surrounding areas and the experimental approach is carried out such as i) slump test, ii) compression test. Four mix proportions were prepared with different proportions of both normal and recycled aggregate (such as 0%, 20%, 40%, 60% of recycled aggregate). However, recycled aggregates present a low quality compared to natural aggregates, the water absorption capacity is more for recycled aggregate .Moreover it was found that optimum workability achieved in fresh concrete mix with 40% replacement of RCA and compressive strength holds good for 40% of recycled aggregate.