Mechanical behaviour of concrete made with coarse recycle concrete of aggregates

Abstract

This research was attempt to use demolition waste replacement of coarse aggregate to produce concrete. An experiment was carry out to determine the strength of concrete with demolition waste aggregate to compare with the normal concrete (with crushed stone coarse aggregate).This research will carry out the particles size analysis, slump test, curing process, concrete density, water absorption and compressive strength experiment. There are 2 difference type of concrete which are normal concrete and recycled aggregates concrete. In recycled aggregates concrete, demolition waste were used to replace coarse aggregates. Furthermore, in normal concrete, crushed stone was used as coarse aggregate. The design strength of mixture concrete is 30 MPa for 28 days and water cement ratio are 0.5. Lastly,the properties of the aggregate will compared. Based on the results obtained, it was found that the compressive strength of normal concrete readings recorded 45.523 MPa. While a mixture of 40%, 60% and 100% of recycle concrete aggregates each 45.076 MPa, 36.458 MPa and 35.218 MPa.