Unfired clay bricks containing waste zeolite
Keywords:
Clay brick, Zeolite, Compressive strengthAbstract
Clay bricks have been used for centuries and continue to remain a popular building material today. The production of clay bricks involves 7 days to 15 days firing process, which not only contributes to air pollution but also results in inconsistent quality. This research developed non-fired clay bricks using zeolite waste from the liquid nitrogen production process. A mixture ratio of cement to lateritic soil of 1:6 was employed, with zeolite replacing cement at varying percentages of 0%, 10%, 20%, 30%, 40%, 50%, and 60% by weight. The bricks were extruded into pellets, cured, and then tested for compressive strength at 7, 14, and 28 days, along with assessments of water absorption, rupture modulus, and thermal conductivity at 28 days. The results revealed that replacing 10% to 40% of cement with zeolite improved compressive strength, rupture modulus, and water absorption. Recommended ingredients that can use zeolite as much as possible while still having compressive strength and water absorption that pass TIS 77-2022 standards include ingredients that use zeolite in place of 20 percent cement (for bricks Quality class B) and the mixture uses zeolite in place of 60 percent cement (for quality class C bricks).
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