Laboratory Evaluation of Stabilising Components for Effective Treatment of Expansive Soil

The experimental study is to understand the mix ratio of fly ash and GGBS (ground granulated blast-furnace slag) in improving the shrink-swell characteristic of soil. The strength of the soil improved considerably after the addition of these stabilisers. In this study, experiments were conducted to observe the influence of the soil stabilisers in the improvement of the strength of the subgrade in expansive soil regions. This influential study will reveal the percentage of Flyash and GGBS mixture. Then the Standard Proctor Compaction test is used to determine the optimum moisture content required to compact the soil with Flyash and GGBS to attain the maximum dry density. The soil’s California Bearing ratio (CBR) was computed to understand the behaviour of improved soil if used as a subgrade. Hence the existing soil can be used as a subgrade with effective treatment of soil.