Effect Of Waste Bricks On The Compressive Strength of Concrete

Abstract

Brick is a common building material used by the community to make a building. However, not all of these bricks can be used if they do not match the size or are cracked or broken so that they become waste and cannot be recycled. This often happens and is left alone by the community so that sometimes it accumulates or is used as stockpile material. Therefore, it is necessary to research how the bricks that have become waste can be reused to be a substitute for fine aggregate in fc'20 quality concrete. The research was conducted at the Civil Engineering Laboratory of Bung Hatta University by experimenting with the design of fc'20 concrete mixtures with applicable standards. The variations in the design of the stone waste mixture were 0%, 13%, 14%, 15%, 16% and 17%. The compressive strength test for the quality of fc'20 was carried out at the age of 7 days, 14 days and 28 days. The results showed that at 7 days of age with 0% brick substitution, the concrete compressive strength was 13.16 MPa and 13.59 MPa at 14 days. It is estimated that at the age of 28 days it will produce a compressive strength of 20.90 MPa, successively with the composition of a mixture of bricks at 13%, 14%, 15%, 16% and 17% at the age of 7 days to produce a compressive strength of 13.59 MPa,13, 59 MPa, 14.58 MPa, 13.02 MPa, and 12.60 MPa. At the age of 14 days the compressive strength was 17.96 MPa, 18.12 MPa, 20.24 MPa, 19.82 MPa, and 19.25 MPa. At the age of 28 days, it is estimated that the compressive strength for fc'20 is 20.59 MPa, 23.00 MPa, 22.52 MPa, 22.84 MPa and 21.87 MPa. Based on these findings it was concluded that waste bricks can be used as a substitute for fine aggregate in the manufacture of concrete with the optimum composition at 14%. A mixture of brick waste that is still feasible to produce quality fc 20 concrete at a composition of 13%, 14%, 15% and 16%