STABILIZATION OF SOIL USING ORDINARY PORTLAND CEMENT AND BENTONITE CLAY
Soil stabilization is a method of altering soil behaviour to improve its performance to be used in construction. Cement is one of the most used materials for soil stabilization. As the sample collected is clayey soil, the combination of Ordinary Portland Cement (of grade 53) and bentonite clay is used as stabilizers. Clayey soils are usually stiff when they are dry and give up their stiffness as they become saturated, associated with low compressive strength and excessive settlement. This reduction in strength due to moisture leads to severe damages to buildings and foundations. Stabilized soil is a composite material that is obtained from the combination and optimization of properties of composite materials. Adding cement with soil results in improved geotechnical properties. Bentonite clay has its own benefits like reduced liquefaction, excellent plasticity and lubricity, high dry-bonding strength, high shear and compressive strength, low permeability and low compressibility. Therefore, adding the combination of cement and bentonite clay ensures safety of the foundation. There are four soil tests are done for the collected plain soil sample as well as for the collected soil sample with added constituent materials (cement + bentonite clay). Their results are compared and evaluated to obtain the strength and stability of the soil.