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Effect of Temperature on Shear Compliance of Soil with Isosteric Water Vapor Adsorption¹

ABSTRACT

Shearing deformation of a soil briquet with equal amounts of adsorbed water at 35.5 and 44.5C was measured from 1 to 86,400 seconds. Deformations at 1 second were the same for both temperatures, but deformation continued at a higher rate thereafter at the higher temperature. The difference in deformation rate at the two test temperatures is greater than the change in fluidity of bulk water at the two temperatures. The isosteric heat of adsorption at the particular water content (equivalent to about 10 monolayers) was about 10% greater than the heat of condensation of water.

¹ Contribution from the Dept. of Soils & Plant Nutrition, University of California, Berkeley.

² Assistant Professor and Laboratory Technician IV, respectively.

Received for publication December 10, 1969. Accepted for publication .