Effects of contamination with gasoline on engineering properties of fine-grained silty soils with an emphasis on the duration of exposure

Abstract Leaking tanks may lead to severe contamination of their surrounding soil. The geotechnical behavior the soil varies with physicochemical processes that occur between contaminant and In this respect, studying geochemical properties gasoline-contaminated soils sediments seems be important for engineering especially environmental purposes. paper, laboratory tests were carried out examine effects crude gasoline on some a silty sampled from Mashhad plain, located in northeast Iran. Tests consisted basic properties, Atterberg limits, compaction, direct shear, uniaxial compression tests, which clean contaminated samples at same densities. prepared by mixing amounts 3%, 6%, 9%, 12% dry weight curing periods 0, 7, 15, 30 days. Results indicated decrease friction angle an increase cohesion increasing content. Besides, reduction maximum density optimum moisture content was observed compaction test. percentage up 6% also showed effect liquid limit plastic soil, decreased thereafter. Moreover, any had reverse modulus elasticity 3% impact compressive strength exceeding it started decline. Finally, duration examined testing days under natural conditions. results relationship all due aging evaporation volatile compounds. Also, numerical analysis settling shear strain beneath foundation level, confirming results.