Comprehensive Review on the Influence of Natural Materials in Soil Stabilization

Abstract. This comprehensive review insists on the impacts of various natural materials in the conventional ground improvement techniques. This review paper focuses on the utilization of natural materials such as Eggshell powder, Rice husk ash, Wheat husk ask, Tamarind Kernel Powder, Jaggery, Chebula, Lime and coir fibers as soil stabilizers. The properties of Unconfined Compressive Strength (UCC), California Bearing Ratio (CBR), index and consolidation characteristics had been compared with existing conventional strength of soils. Out of the materials used for soil stabilizing agents, Rice Husk Ash, Eggshell powder and Tamarind Kernel Powder showed better ground improvement properties. The eggshell powder with 5% optimum replacement by weight of dry soil sample showed an improvement in strength. The properties of the soil sample achieved the improvement in strength with rice husk ash of 6-8% optimum level. TKP of 10% was added in the soil sample showed the soil liquid limit increase to 117% from 67%. TKP of 2% and 8% were added in the soil sample showed the shrinkage limit decrease to 15.4% and 11.4% respectively. Meanwhile, TKP of 8% in the soil sample resulted in a decrease of dry density to 14 kN/m2 from 17.1 kN/m2. Similarly, improved strength for achieved from the following combinations of jaggery and eggshell powder, lime and Chebula.