Study on mechanical properties of concrete using different types of coarse aggregates

Abstract

In the construction industry over the past few decades use of concrete has increased exponentially. This has lead to scarcity of its natural ingredients (Coarse and Fine Aggregates). Hence there is a need to look for other alternatives. This research is aimed at finding suitable alternative to conventional coarse aggregates. The alternatives considered are waste granite marble chips, angular aggregate, demolished aggregate and round aggregate. Eare performed on these so as to ensure the quality of aggregates. M20 Conventional concrete is taken as reference sample and designed as per IS 10262–2009. Coarse aggregate is replaced 100% with each of the above alternatives and these mixes are also designed as per IS 10262–2009. Water cement ratio for all mixes is fixed as 0.50. Standard cubes of size 150x150x150mm were casted for all the concrete mixes, cured and tested for compression test 07, 14 and 28 days age as per IS 516–2002 (Reaffirmed 2018). The compressive strength at 28 days age obtained for reference sample-conventional is 22.35 N/mm2, waste granite chips is 22.04 N/mm2, angular is 21.33 N/mm2, demolished aggregate is 13.41 N/mm2 and round is 13.15 N/mm2 and. It is clear that waste granite aggregate is the best alternative to conventional coarse aggregate.