Utilization of bagasse ash plus cement to increase the shear strenght of clay soil

Abstract

Soil shear strength is one of the parameters for assessing the bearing capacity of the soil. Clay soil is a type of soil with poor bearing capacity. To improve the bearing capacity of clay, a mixture of materials can be used as a stabilizing agent. In this study, the mixed material used as a stabilizing agent was bagasse ash plus cement with a percentage of bagasse ash at 5%, 10%, and 15% of the dry weight of the soil. The percentage of cement used is 5% of the dry weight of the soil. Tests were carried out in the form of laboratory tests, sieve analysis, limits of consistency, specific gravity, compaction, and direct shear test. The testing standard uses the Indonesian National Standard (SNI). Soil classification using the Unified Soil Classification System (USCS) method. The results showed that the cohesion and shear angle in the soil increased with the increase in the percentage of bagasse ash plus 5% cement so that the shear strength of the clay also increased from 48.558 kN/m2 for clay without mixture to 71.217kN/m2 with variations of clay mixed with bagasse ash 15% plus cement 5%.