Stabilization of Soil using Lime Activated Ground Granulated Blast Furnace Slag for Soil Subgrade

Soil is used as a material for road construction in sub grade and sub base region of the pavement. If the strength of soil is poor due to it being soft, has a high swelling tendency or low shear strength than soil stabilization is required. Its main advantage over soil replacement is most of the time it is done to reduce the cost incurred. There are numerous stabilizers available in the market like lime, cement, flyash, granulated slag etc. In this paper we will use ground granulated blast furnace slag as stabilizer. Although the stabilizer is neutral, it requires a activator to start the reaction which is provided in form of lime. So the percentage of soil to admixture play a crucial role in soil stabilization as they have different specific density. The objective of the study is to improve the locally available weak soil with stabilizers. The test involved are Modified proctor test to find the maximum dry density of the sample mixture and CBR test to check whether adding admixture improves the soil, as higher the CBR it helps to reduce the crust thickness and helps in increasing the bearing capacity of the soil. Thus overall may help in reduction of cost incurred in the project.