The Compressibility Behavior of Oil Contaminated Soils

 

Ijimdiya, T.S.a and Igboro, T.

Department of Civil Engineering, Ahmadu Bello University. Zaria
a: Corresponding author; e-mail: tom_ijim@yahoo.com, tsijimdiya@abu.edu.ng

 

 ABSTRACT

Appreciable quantities of used motor oil spills are common at and around mechanic workshops. Laboratory testing program was carried out to determine the effect of used motor oil contamination on the strength and compressibility properties of lateritic soils. Contaminated specimens were prepared by mixing the soil with used motor oil by weight of dry soil in order to evaluate the usefulness or otherwise of oil contaminated soils in engineering construction. The results indicated a decrease in the unconfined compressive strength (UCS), coefficient of consolidation, cv and coefficient of volume compressibility, mv, up to 6% oil content. The UCS of the specimens containing, 0, 2, 4, and 6 % oil content were 154, 185, 180, 151 and 103 kN/m2, while the coefficient of consolidation, cv and coefficient of volume compressibility, mv, decreased to 373, 75, 27 and 12 m2/year and 157 x 10-6, 334 x 10-5, 305 x 10-5 and 540 x 10-6 m2/MN, respectively at 0, 2, 4 and 6 % oil content. The results of laboratory tests show that properties of the soil were immensely impaired on contamination with oil.

Keywords: Coefficient of consolidation, Coefficient of volume compressibility, Lateritic soil, Unconfined compressive strength (UCS), and Used motor oil.

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