Volume 9, Issue 1 (March 1986)

    Swelling Pressure of Clays


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    Experiments by three methods to determine the swelling pressure of clays showed that the conventional consolidation test gives an upper bound value, the method of equilibrium void ratios for various consolidation pressures gives the least value, and tests by the constant volume method give intermediate values. However there is no definite relationship between the three methods. The paper also shows that time effects involved in conducting the tests and the effect of stress path are both significant. Time versus swelling, and to a greater extent, time versus pressure relations can be represented by a rectangular hyperbola, which can be used to predict the ultimate swelling and the swelling pressure, respectively.

    Tests with varying initial conditions of molding moisture content and density have exhibited a unique relationship between swelling pressure and the initial dry density for black cotton soil. This result is in line with the osmotic pressure theory. The molding water content has marginal effect on the swelling pressure.

    Author Information:

    Sridharan, A
    Professor and scientific officer, Indian Institute of Science, Bangalore,

    Rao, AS
    Professor of civil engineering, College of Engineering, Anantapur,

    Sivapullaiah, PV
    Professor and scientific officer, Indian Institute of Science, Bangalore,

    Stock #: GTJ10608J

    ISSN: 0149-6115

    DOI: 10.1520/GTJ10608J

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    Title Swelling Pressure of Clays
    Symposium , 0000-00-00
    Committee D18