The effect of Empty Fruit Bunch (EFB) on mechanical properties to cemented sludge by FCSS method

Abstract

A large amount of high-water content sludge is often generated from the landslide phenomenon. The recycling process is necessary to reduce the soil waste and transportation cost. This work demonstrates an experimental scale recycling process by applying fiber-cement stabilized soil (FCSS) method. FCSS method implements the addition of EFB and cement to the sludge for the soil improvement which is expressed in failure strength and hydraulic conductivity. Therefore, the unconfined compression strength (UCS) and permeability test are conducted with a variative amount of EFB, and cement. The water content used in this work is 60 and 100%. Moreover, the effect of EFB length is examined in the UCS test by applying the 10- and 30-mm length. The results show that the increased amount of EFB and cement inclines the failure strength values. As the target value sets to 123 kPa, most mixing conditions in water 60% satisfies the target while the mixing condition with high EFB and cement are above the target in water 100%. In addition, the 30-mm EFB performs better compared to 10-mm. Therefore, the permeability test applies only 30-mm. In contrast, the increased amount of EFB and cement decreases the hydraulic conductivity.