Role of Additives in Expansive Soil to Improve Stabilization Performance using Biomass Silica

Soil is the major base for any type of structure, it mainly consists of minerals, organic matter, liquids etc. It represents the stability of any type of soil which the structure retains itself without affecting its properties. Black cotton soil is one among the type of expansive soil. Its property is of swelling excessively when wet and shrinks highly when exposed to dry condition. In black soil it mainly consists of montmorillonite mineral which has the ability to undergo large swelling and shrinkage. To overcome this, properties of soil should be enhanced by artificial means known as ‘Soil Stabilization’. It is the procedure in which existing properties of soil are improved by means of addition of chemical or any admixture.The main additive used in this is Bagasse Ash which is a fibrous material obtained from sugarcane plant after the extraction of sugarcane juice. Sugarcane industry produces 30% bagasse for each lot of crushed sugarcane. It mainly consists of silica content. The tops and leafs of sugarcane stalks which is called as sugarcane straw which is also one of the additive which is used in it. Sugarcane straw ash (SCSA) which has high pozzolanic activity. In this laboratory experiments were conducted on this expansive soil with partial replacement by bagasse ash. This paper highlights significant increase in properties of this black cotton soil obtained at replacement of bagasse ash and SCSA which are free from chemical and it mainly protects the environment from any hazards.In this study laboratory experiments were conducted on black cotton soil with partial replacement by different percentages (3%, 6%, 9% and 12%) of Bagasse Ash and Sugarcane straw ash mix proportions. This paper highlights significant increase in properties of black cotton soil and analysis for the use of bagasse ash and sugarcane Straw ash waste in pavement construction will be made.