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Critical state behaviour of an unsaturated clayey sand along constant water content direct shear and triaxial loading conditions
This article examines the critical state behaviour of an unsaturated clayey sand with respect to the principle of effective stress in unsaturated soils. This was experimentally achieved through a series of constant water content triaxial and direct shear tests in a range of matrix suction and net confining stress. The general trends observed are discussed and compared in relation to some available data in the literature. It is shown that the slope of critical state line in q−p′ space in unsaturated condition appeared to be close but not equal to saturated state. Accordingly, it is observed that an equation of state also exist in v−ln p′ space for unsaturated condition that is identical to the equation used for saturated state with the difference that their coefficients were dependent to the variation of degree of saturation and their corresponding values in complete saturation condition. The above-mentioned trends were identical throughout the results attained from both triaxial and direct shear tests.
Critical state behaviour of an unsaturated clayey sand along constant water content direct shear and triaxial loading conditions
This article examines the critical state behaviour of an unsaturated clayey sand with respect to the principle of effective stress in unsaturated soils. This was experimentally achieved through a series of constant water content triaxial and direct shear tests in a range of matrix suction and net confining stress. The general trends observed are discussed and compared in relation to some available data in the literature. It is shown that the slope of critical state line in q−p′ space in unsaturated condition appeared to be close but not equal to saturated state. Accordingly, it is observed that an equation of state also exist in v−ln p′ space for unsaturated condition that is identical to the equation used for saturated state with the difference that their coefficients were dependent to the variation of degree of saturation and their corresponding values in complete saturation condition. The above-mentioned trends were identical throughout the results attained from both triaxial and direct shear tests.
Critical state behaviour of an unsaturated clayey sand along constant water content direct shear and triaxial loading conditions
Mirzaii, Ali (author) / Yasrobi, Seyyed Shahaboddin (author) / Hefzi, Ebrahim (author)
International Journal of Geotechnical Engineering ; 14 ; 286-294
2020-04-02
9 pages
Article (Journal)
Electronic Resource
English
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