Effects of Lime on Sub-Base of Flexible Pavement

Abstract

LimeStabilization is the modern method of Improving physicaland chemical properties of soil, this method expected to improve the Performance of Flexible Pavement by treating the Sub-base Materialslocally available in the Construction corridorby Lime. The objective of this paper is to evaluate theperformance of Flexible Pavement by treating the sub-base materials by Lime and was meant to analyse the CBR and UCS as the measure of the Performance of Flexible Pavement.Materials was classified as Clayey Gravelcontained 61.9% Gravel and 28.5% Clay, either materialwere having a PI of 25% and Liquid Limit of 40.8% wand classified as Clay with low Plasticity. Investigation showed that as the increase in Lime content the CBR values increased by20.9% at 10% Lime content which gave a CBR value of 22.4% while at 0% was 4.7% butbeyond 10% Lime Soil exhibits decrease in CBR.Either as the increase in Lime content the UCS has shown an increase by 24% where at 2% UCS value was 0.8Mpa and at 10% UCS value was 3.2Mpa after seven dayscuring and submerged into water for four hours as per standards. Fromthe discussion of results as the study jointly analysing the associated factors for the Performance of Flexible Pavements which were CBR and UCS, therefore it was established the optimum Lime content of 10% gives the maximum strength as such Locally available soil along the construction corridor can be used as the Sub-base materials with high Performance of Flexible Pavement