Rheological Properties and Mechanical strength of Recycled Concrete Aggregate SCC

Abstract

This study examined the effects of incorporating recycled concrete aggregate (RCA) as coarse aggregate on the rheological and mechanical properties of self-compacting concrete (SCC). Four mixes were designed and prepared in different RCA content (25, 50, 75 and 100% by weight of coarse aggregate) in addition to the reference mix. RCA was obtained from demolished precast concrete of destroyed residential buildings. The results showed that there was a decrease in the followability, filling and passing ability of the concrete as the RCA replacement ratio increase. The mechanical properties slightly decreased with an increase in the RA replacement ratios. It was found that RCA can be used to produce SCC with satisfied rheological and mechanical properties even with 100% replacement of normal aggregate