Strength Properties of Concrete Made from Recycled Brick Concrete and EAF Slag Blended as Coarse Aggregate

Abstract

Concrete of three different target strength, i.e. 17.23, 20.68 and 24.13 MPa was prepared using recycled brick concrete (RBC) and electric arc furnace slag (EAFS) blended as coarse aggregate. EAFS ratio was kept at 0%, 25% and 75% with respect to RBC. Concrete cylinder (200mmX100mm) specimens were prepared following standard procedure. Compressive and tensile strength on those concrete samples were conducted as per ASTM standard procedures. It was found that target compressive strength could not be achieved using 100% RBC as coarse aggregate. Through mixing EAFS with RBC both compressive and tensile strength of concrete was found to increase. 50% EAFS ratio was found to give maximum compressive and tensile strength for this type of blended aggregate concrete.