An Experimental Study of Strengthening of Sub Grade Soil At Different OMC (Using Calcium Oxide And Sodium Silicate)

Abstract

The process of compaction is not enough to  improve the properties of soil particularly in arid and semi  arid regions. To enhance the strength and reduce the  sensitivity to water change of weak clay deposits, lime and  sodium silicate stabilization can be used. The soil  stabilization process first involves adding suitable additive to  the soil which first changes its properties and then  compacting soil admixture suitably. The soil stabilization  method is used only for the soils in shallow foundations or  the base course of roads, airfield pavements etc. The  properties of a soil changes with the usage of lime to give  long term permanent strength and stability especially when  exposed with water and frost. The degree of reactivity with  lime and the ultimate strength that the stabilized layers will  develop can be determined by the mineralogical properties of  the soils. Recommended percentage of lime for Soil  stabilization varies from 2% to 10%. For coarse soils such as  clay gravels, sandy soils with less than 50% silt- clay  fraction, the recommended percentage of lime varies from  2% to 5%, whereas for soils with more than 50% silt clay  fraction, the recommend