Laboratory and Field Performance of Stabilized Soft Subgrade with Granular Material and Polymer

Usually the service life of pavement on weaker sandy subgrade is affected due to their low density and compressibility behaviour. These sandy soil possess low strength, CBR value. Hence seasonal changes affect properties of these sandy soil adversely. Stabilization techniques using granular material and polymer is listed in literature for improving properties of these types of soft subgrades. This paper discusses the performance of stabilized soft sandy soil for suitability as subgrade using Moorum as granular material and polymer. Dynamic cone penetration test and CBR tests are carried out in laboratory on composite sandy soil with varying polymer content and the results are presented. There is considerable reduction in optimum moisture content by adding polymer. Considerable improvement in both index & engineering properties.in soaked CBR, Maximum dry density and optimum moisture content with granular material and polymer is observed. In this paper an attempt was made to assess the effectiveness of sandy soil blended with granular material and polymer for sand stabilization by studying the subgrade characteristics.