THERMODYNAMIC STABILITY AND THE LAW OF CORRESPONDING STATES IN SWELLING SOILS

Following a heuristic suggestion by Groenevelt and Parlange, thermodynamic description is given of a postulated order-disorder transformation in a swelling soil. This transformation is shown to correspond to a phase transition of the second order at the air entry point, wherein the onset of a microscopic ordering process among the clay crystals in the soil occurs and there is a consequent discontinuity in the slope of the swelling curve. The available experimental swelling curves with which this prediction can be checked are organized on the basis of a new application of the law of corresponding states that permits all of the data to be plotted as a single, universal function of a reduced gravimetric water content variable. Scatter in the swelling curve data is sufficiently great at present to preclude a definite conclusion as to whether a second-order phase transition actually occurs in swelling soil.

  • Corporate Authors:

    Soil Science Society of America

    677 South Segoe Road
    Madison, WI  USA  53711
  • Authors:
    • Sposito, G
    • Giraldez, J V
  • Publication Date: 1976-5

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Filing Info

  • Accession Number: 00139300
  • Record Type: Publication
  • Files: TRIS
  • Created Date: Sep 16 1976 12:00AM