ASSESEMENT STUDIES ON THE USE OF RICE HUSK ASH AND GGBS IN IMPROVING COASTAL SANDY SOILS

Soil is highly complex, heterogeneous and unpredictable material which has been subjected to vagaries of nature, without any control. The word sandy soil represents a soil which consists of more amount of sand particles and small amount of clay and silt particles. Sandy soil is generally found in western grads, coastal areas. The soil profile in coastal area often consists of sandy soil extended to a depth of 3 to 4 m from the ground level underlies by clay soil of medium consistency. The very low shearing resistance of foundation bed causes local as well as punching shear failure this type of soil profile found coastal area of Coastal Andhra. Sandy soil also consists of low plasticity, low bearing capacity and high moisture content. Hence it is very essential to stabilize the sandy soil. Hence in order to improve the properties of such soils many methods are available like soil stabilization, soil replacement, moisture control, prewetting etc. soil stabilization is a widely accepted technique that process by changing the behavior and properties of soil under certain conditions. Soil stabilization involves changes in properties like strength, density, swelling behavior, etc. Soil stabilization techniques can considerably increase the profiles of the low strength expansive soils to the desired extent. Further, these techniques are very economical and reduce the overall cost of a project. In recent years, soil stabilization by using various industrial wastes was a most common practice. Keeping in view in the present research, experimentation was carried out to investigate the performance of agricultural waste like Rice Husk Ash and industrial waste GGBS. To understand the performance of stabilized soil, its properties like Atterberg’s Limits, Compaction Parameters, and Penetration Parameters were studied in the laboratory.