Stabilization of clay shale using propylene glycol and laterite on california bearing ratio

Abstract

Clay shale in natural condition has a very high strength. Due to weathering caused by exposure with air and water, its strength will decrease significantly. Propylene glycol is established as an effective shale inhibitor in water-based muds. The effect of mixing propylene glycol with clay shale to increase its strength needs to be discussed. Sample of Citereup clay shale were mixed with propylene glycol with ratio 0.3, 0.5, and 0.7 of its optimum water content. California Bearing Ratio test have been performed to determine clay shale bearing strength. Result indicates that clay shale stabilization using 30% propylene glycol can increase strength in unsoaked condition. Laterite soil mix also give additional bearing strength to clay shale specimen.