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Geomechanics and Engineering Volume 20, Number 4, February25 2020 , pages 299-312 DOI: https://doi.org/10.12989/gae.2020.20.4.299 |
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Interface shear between different oil-contaminated sand and construction materials |
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Amirhossein Mohammadi, Taghi Ebadi and Mohammad Reza Boroomand
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| Abstract | ||
| The aim of this paper was to investigating the effects of soil relative density, construction materials roughness, oil type (gasoil, crude oil, and used motor oil), and oil content on the internal and interface shear behavior of sand with different construction materials by means of a modified large direct shear test apparatus. Tests conducted on the soil-soil (S-S), soil-rough concrete (S-RC), soil-smooth concrete (S-SC), and soil-steel (S-ST) interfaces and results showed that the shear strength of S-S interface is always higher than the soil-material interfaces. Internal and interface friction angles of sand beds increased by increase in relative density and decreased by increasing oil content. The oil properties (especially viscosity) played a major role in interface friction behavior. Despite the friction angles of contaminated sands with viscous fluids drastically decreased, it compensated by the apparent cohesion and adhesion developed between the soil grains and construction materials. | ||
| Key Words | ||
| internal and interface shear strength; sand; gasoil; crude oil; used motor oil; relative density | ||
| Address | ||
| Amirhossein Mohammadi and Mohammad Reza Boroomand: Department of Civil Engineering, Tafresh University, Tafresh, 3951879611, Iran Taghi Ebadi: Department of Civil and Environmental Engineering, Amirkabir University of Technology, Tehran, 1591634311, Iran | ||