Aspects of ice lens formation

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Conference3rd International Symposium on Ground Freezing; U.S. Army Corps of Engineers, CRREL: 22 June 1982, Hanover, New Hampshire, USA
Pages239245; # of pages: 7
SubjectPermafrost; Soils; frost heaving; frozen soils; ice; x-ray detection; thermal gradient; ice lens temperatures; suction gradients; leda clay
AbstractIt is possible to locate a growing ice lens in a frost heave cell in soil under laboratory conditions by means of a recently devised X-ray technique. If temperature distribution is measured in the sample at the same time, the temperature of the growing face of the ice lens can be determined. The objective of the study was to validate this method under a range of heaving conditions. It was done by determining ice lens temperatures at various overburden pressures and cold side temperatures; then, by adjusting the ice lens temperature for overburden pressure and pore water salt content, the remaining difference from 0 degrees C was expressed in terms of suction. Suction gradients in unfrozen soil under various freezing conditions were subsequently plotted as a function of rate of moisture flow and a proportionality was shown to exist. In addition the calculated permeability coefficient was the expected value for the material, Leda clay. These results lend credence to use of the X-ray - thermal gradient technique for studying thermal behaviour of ice lens growth.
Publication date
AffiliationNRC Institute for Research in Construction; National Research Council Canada
Peer reviewedYes
NRC number20609
NPARC number20375848
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Record identifier02d445cc-c57f-4b2d-a053-14815ef844fb
Record created2012-07-23
Record modified2016-05-09
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