An Experimental Study of Concrete with Soaked Recycled Aggregate as Coarse Aggregate

Concrete is the most widely used construction material because of its high structural strength and stability. Its main constituents are cement, sand, fine, coarse aggregates, and water. Most of the aggregates and raw materials for cement used in the manufacture of concrete come from quarries or alluvial rivers. Recycled construction wastage is the promising way towards sustainable construction. Recycled coarse aggregate (RCA) is the most common idea, Recycled aggregate (RA) obtained from crushed concrete rubble, instead of being stored, can be reused in building industry. An attempt has been made to study the possibility of reusing the recycled concrete aggregate from demolished structures in the place of normal aggregate. The main problem of using recycled aggregate is the adhered mortar poses which deleterious effects on the concrete. To overcome this problem, in this study recycled aggregate is soaked in GGBS solution for 24 hours and then used in concrete (GRAC mix). Experimental investigation is carried out with a conventional M40 mix. The GRAC mix gives better performance in terms of compressive strength, splitting tensile strength and flexural strength comparing with M40 conventional mix.