Soil Stabilization Using Natural Materials for Highway Construction- An Overview

Soil stabilization is defined as the process of improving physical properties of soil such as shear strength, permeability, bearing capacity etc., that can be done by controlled compaction or addition of suitable admixtures including cement, lime, fly ash or providing geotextiles, geo-synthetics etc. The characteristics of the subgrade soil depend upon the performance of pavement. Due to this reason, the subgrade which is found to be weak is enhanced by suitable and efficient stabilization method. From literature it can be found that soil stabilization with natural pozzolana activated with lime enhance the properties of soil. This paper presents a review of papers on stabilization of soil using natural pozzolanic materials and the best combination of such materials to impart good pavement material.