ABSTRACT

According to SNI 03-2834-2000, concrete is a mixture of Portland cement, fine aggregate, coarse aggregate, and water with or without added materials to form a solid mass. Many studies have developed the building blocks of concrete mixtures to improve their quality and properties of concrete mixtures. In this study, lightweight brick waste from the rest of the construction project was used with a first refining process to pass a 0.3 mm sieve as a fine aggregate substitution mixture. The test object used is a cylinder with a size of 15 cm x 30 cm with variations in substitution of lightweight brick powder (SBR) 0%, 10%, 15%, 20%, and 30%. The method of calculating and testing materials and concrete specimens is guided by SNI 03-2834-2000. It was found that the substitution of SBR had a varying effect on the compressive strength of concrete. The maximum compressive strength was found at 21.44 MPa at 28 days, with an optimum SBR of 15% for fine aggregate.