Experimental study on high strength concrete by using recycled coarse aggregate

Abstract

Now days the critical shortage of natural aggregate, the availability of demolished concrete for use as recycled coarse aggregate is increasing. Using the waste concrete as RCA conserves natural aggregate, reduce the impact on landfills, decreases energy consumption and can provide cost savings. The main objective of this investigation is to find out the percentage of natural coarse aggregate can be replaced by the recycled coarse aggregate in the M30 concrete. Tests were carried out to determine the compressive strength, split tensile strength, flexural strength with and without recycled aggregates. Recycled coarse aggregates in concrete were replaced 15%, 25%, and 35% instead of conventional aggregate. For the strength characteristics, th e result showed a gradual increase in mechanical properties by addition of RCA as the percentage of recycled aggregate is increased.