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The utilization of waste as soil stabilization materials is a solution to reduce the amount of waste and improve the building materials quality. This research is using Spent Bleaching Earth (SBE) materials from the palm oil industry waste. SBE can be reused to be pozzolan materials. This research aimed to investigate the SBE waste effect as an admixture on clay stabilization used 10% Clean Set Cements (CS60) on density and California Bearing Ratio (CBR). A combination of CS-60 and SBE waste was expected to increase the CBR value of clay. Furthermore, SBE waste would decrease cementitious material for clay stabilization. Variation comparison of Clay : CS-60 : SBE on ST03, ST04, and ST05 were 67.5% : 10% : 22.5%; 45% : 10% : 45% and 22.5% : 10% : 67.5% respectively. The test was conducted on water content, density, and load penetration based on SNI 1744:2012. Generally, the CBR value of subgrade and improved subgrades oil with the moderate and good category are about 5-20%. As a result, the CBR value of ST 01 as original clay and ST 02 as clay with 10% CS-60 was 3.24% and 5.01%, respectively. Using SBE waste as an admixture material on clay stabilization increased CBR value better than clay stabilization used CS-60. ST03, ST04, and ST05 with CBR's value were 5.39%, 8.52%, and 17.99%, respectively. Furthermore, the density value decreased when SBE waste is used.

Pemanfaatan Limbah Spent Bleaching Earth pada Stabilisasi Tanah Lempung dengan Clean Set Cement