FROST-HEAVING PRESSURES.

Upon freezing a saturated soil in an open system from the top down, a considerable pressure develops. The pressure is the result of the surface energy of a curved ice-water interface. The curvature of the interface is necessary for ice to proliferate through the soil pores. The curvature is related...

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Bibliographic Details
Main Authors: HOEKSTRA,P., Chamberlain,E., Frate,A.
Other Authors: COLD REGIONS RESEARCH AND ENGINEERING LAB HANOVER N H
Format: Text
Language:English
Published: 1965
Subjects:
Soil Mechanics
Snow
Ice and Permafrost
*SOILS
DEFORMATION
PRESSURE
ICE
WATER
POROUS MATERIALS
Ice
permafrost
Online Access:http://www.dtic.mil/docs/citations/AD0626175
http://oai.dtic.mil/oai/oai?&verb=getRecord&metadataPrefix=html&identifier=AD0626175
Description
Summary:Upon freezing a saturated soil in an open system from the top down, a considerable pressure develops. The pressure is the result of the surface energy of a curved ice-water interface. The curvature of the interface is necessary for ice to proliferate through the soil pores. The curvature is related to the pore size distribution of the soil. The test chamber is designed to minimize the friction of the soil with the wall. An accurate control of heat removal is obtained by thermoelectric cooling. A load cell placed on top of the sample is used to measure the pressure developed and at the same time prevents heaving of the sample. By measuring the pressure on a layered sample, it can be shown that the pressure develops at the freezing front. The results on several soils indicate that the maximum pressure that develops has a characteristic value for each soil. For each soil used, the water content versus tension curve is given and the maximum pressure is related to this curve. (Author)

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