Co-relation Between Electrical Resistivity and Index Properties of Periodic Hydrocarbon Contaminated Bentonite Clay

摘要

Present papers deals with determination of electrical resistivity of hydrocarbon contaminated bentonite clay and to establish correlation between electrical resistivity and index properties for periodic contamination. Research work focuses on studying the hydrocarbon-bentonite interaction through electrical resistivity which is one of the perturbed geo-physical method of analysis and is non-destructive in nature. Bentonite clay, which is expansive in nature with high montmorillonite mineral content usually have resistivity range between 10 ?-20?. The resistivity range for hydrocarbon contaminated bentonite clay for each period is determined and obtained in the laboratory. The impact of hydrocarbon contamination on electrical resistivity of bentonite clay is studied through passing 30 V-40 V DC voltage through compacted sample in a resistivity box in accordance with ASTM G-187. CEC, ED AX tests were performed to evaluate the effect of ions of montmorillonite clays and their penetrability into hydrocarbon-clay matrix. The above study reveals that there is a major influence of hydrocarbon contamination on engineering behavior of clays. This leads us advance assessment of influence of both percentage contamination and periodic contamination on strength characteristics of such marine clays.