Behavior of Black Cotton Soil with Addition of Sodium Carbonate and Calcium Carbonate

The properties of Black Cotton Soil may be improved with Sand Cushions, CNS layers techniques, sand Columns, Stone Columns, Vibration Techniques and by adding Chemicals etc. Among these Chemical Stabilization is expansive than other types of stabilization methods. But the main advantage is setting time and curing time can be controlled. This paper emphasizes the effectiveness of Sodium Carbonate and Calcium Carbonate in stabilizing a Black Cotton Soil (BCS). The effectiveness of Calcium Carbonate is much better than Sodium Carbonate from Strength and stability point of View. The soil sample is prepared with chemical solution of varying percentages. Chemical solution is prepared by dissolving chemical powder in distilled water. The percentages of chemical are varied from 0 %, 0.5 %, 1.0 %, 1.5 %, 2.0 %, 2.5 %, 3.0 % by weight of the soil at 0, 3, 7 days curing. The Quantity of chemical computed corresponding to the above percentages is dissolved in distilled water and blended into soil thoroughly in order to obtain even distribution of the chemical and used for the tests.