Stabilization of Tropical Residual Soil Using Rice Husk Ash and Cement

摘要

As the construction industry evolves the issue of sustainability and the use of environmentally friendly methods of construction has become one of the major concerns, past research has shown the effectiveness of using industrial by products such as rice husk ash as a stabilizing agent. Improvements in strength, durability, plasticity and other properties of soil have been reported to occur after the addition of industrial by-products. Stabilization of residual soil using rice husk ash and cement has been studied. Investigation includes the evaluation of properties of the soil such as compaction, shear strength, CBR. For this study various amounts of RHA were mixed with soil then after the optimum amount of RHA which gave the soil the highest shear strength, the soil was then mixed with the optimum amount of RHA with varying amounts of cement. Laboratory test results show that both cement and rice husk ash reduce the maximum dry density and increase the optimum moisture content from the view of both compaction and strength characteristics. Addition of 10-15% cement and 6-8% rice husk ash is recommended as an optimum amount.