Uji Eksperimental Sifat Mekanik dan Sifat Fisik Bata Ringan CLC dengan Variasi Fly Ash sebagai Cement Replacement Material

Abstract

Brick generally used as a building material for wall construction. Brick mostly called as red brick. The clay is casted, dried, and burned. Red brick wall has a large enough density that about 1700 kg/m3, that be a heavy enough weight for the building structural. An alternative for replacing the red brick is required. The alternative that what meant is a Fly Ash Cellular Lightweight Concrete (CLC). Fly ash that used in this research is obtained from PT. PLN at Pangkalan Susu. This research is using a Fly Ash Cellular Lightweight Concrete that has to be tested before. This research uses a several percentage variations of fly ash as a cement replacement with 0%, 10%, 20%, 30%, 40% and 50%. The test of this Fly Ash Cellular Lightweight Concrete are mechanical properties in the form of compressive strength test and flexural strength test, physical properties in the form of density test and absorption test. The optimum composition for designing a lightweight concrete using a fly ash as a cement replacement is 20% Fly Ash Cellular Lightweight Concrete that has 1,903 MPa compressive strength average, 1070,278 kg/m3 density average, 14,81% absorption value average and 0,337 MPa flexural strength value average. Fly ash cellular lightweight concrete may replace the red brick usage as a building material since has a lighter weight and bigger volume.