EFFECT OF LIME AND FLY ASH ON UNCONFINED COMPRESSIVE STRENGTH (UCS) OF EXPANSSIVE SOIL

In India, there is an increase in the number and capacity of the thermal power plants because of the increase in demand for electricity. Most of these thermal power plants use coals which are of inferior quality. These inferior quality coals produce huge amount of fly ash. The utilization of fly ash in India varies between 89-92% and the rest are disposed in ash ponds. The present work aims to find the effect of additives namely Lime and Fly ash on Compaction characteristics, Unconfined Compressive Strength (UCS), Here the Expansive soil is used in this study. First the soil were mixed individually with varying contents of lime and fly ash to find out their effects on the treated soil samples compacted at Optimum Moisture content (OMC) and Maximum Dry Density (MDD) were tested for Unconfined Compressive Strength (UCS) at different Curing periods. The Unconfined Compressive Strength (UCS) increases more with increase in Lime content rather than by increase in fly ash with cement content. The Unconfined Compressive Strength (UCS) increases with curing time.