Stabilisation of Engine Oil Contaminated Soil Using Cement Kiln Dust

The utilisation of industrial bi-products such as cement kiln dust (CKD) is of increasing importance as an option for stabilising contaminated sites due to its pozzolanic nature and also in view of minimising the environmental impact. The experimental programme was carried out in the present study to evaluate the efficacy of CKD as stabilising agent at different percentages 2%, 6%, and 14% (w/w) on the geotechnical properties of diesel engine oil contaminated soil (CS). The results show that the specific gravity of contaminated soil increased and the consistency limits were also affected marginally and the plasticity index (PI) is slightly increased due to contamination. CKD addition show increase in consistency limits of soil. The compaction characteristics of stabilised soils were observed to be decreasing trend of maximum dry unit weight and increasing trend of optimum moisture content (OMC) with increase in CKD addition. The free swell index (FSI) of contaminated soil increased to 75% from 20% in uncontaminated soil. The free swell index of contaminated soil decreases with increase of CKD percentage. Unconfined compressive strength (UCS) of soil increased with increase of CKD addition and it showed regain of UCS. From the laboratory studies of the present research work CKD has potential to be used as an effective alternate stabilising agent. Indian Geotechnical Conference – 2010, GEOtrendz December 16–18, 2010 IGS Mumbai Chapter & IIT Bombay