Effect of bamboo fibers in hydrated lime - treated residual soil on permeability characteristic

Residual soil describes soil that forms naturally in its current location as a result of bedrock weathering and decomposition. Usually, it can be located above the parent rock where it first formed. Their variation of soil properties composition porosity, particle size, texture and strength have huge implications towards the level of permeability. However, most of the studies within the field of residual soil that only focused on strength and durability improvement and information on permeability of the residual soil is not yet provided sufficiently. Most of the research were focused on permeability testing method. Therefore, the purpose of this research is to obtain the optimum result in soil permeability on the various usage of hydrated lime and bamboo fiber by using falling head permeability testing method. The mix proportions of hydrated lime and bamboo fiber are also prepared into five groups with treated sample each, 5% of Hydrated Lime for all mix design, and 0%, 0.5%, 1%, 2% bamboo fiber for each mix design respectively. There is a total of 51 samples for permeability testing. In this study, bamboo fiber will be prepared with different length, which are 5mm, 10mm, and 20mm respectively in the permeability test apparatus to determine the level of permeability of the soil. In this study, it was found that the permeability of hydrated lime -treated soil using 1% BF was at 0.05 mm/s and 0.03 mm/s using 10 mm and 20 mm length of BF respectively.