Effect of gas oil on geotechnical properties of illite soil

International Conference on Structural and Civil Engineering Research

October 01-02 , 2018 Amsterdam , Netherlands

Hossein Safehian, Ali M Rajabi and Hasan Ghasemzadeh

University of Qom, Iran University of Tehran, Iran K N Toosi University of Technology, Iran

Posters & Accepted Abstracts: JET

Abstract

Development of the oil industry has increased the possibility of oil spillage into the soil. Oil pollution not only has serious environmental damages, but also it can change the physical, chemical and mechanical properties of soils. Clayey soils have complex behaviour in the presence of petroleum products. In order to better understand the complicated behaviour of oil-contaminated clayey soils, different laboratory tests were conducted on gas oil-contaminated illite soil. The amounts of gas oil were between 0 to 20% by soil dry weight. In this study, standard compaction and one dimensional consolidation tests were performed to evaluate the effect of gas oil on the compaction and consolidation properties of illite. Also, direct shear and unconfined compression tests were done to investigate the strength parameters of contaminated illite. In addition, scanning electron and atomic force microscopes were utilized to study the effect of gas oil on microscopic properties of illite. The results showed a decrease in maximum dry density and an increase in optimum fluid content and compressibility of illite in presence of gas oil. The cohesion, internal friction angle and unconfined compressive strength of the soil reduced when it was exposed to the organic fluid. The results revealed that gas oil has adverse impacts on the geotechnical behavior of illite.

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