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Title: Effect of thermal gradient on ionic diffusion in frozen earth materials : I, experimental
Authors: Murrmann, R. P.
Hoekstra, P. (Pieter)
Keywords: Bentonite
Frozen soils
Ionic diffusion
Ion migration
Ion velocity
Frozen ground
Soil moisture
Soil water
Publisher: Cold Regions Research and Engineering Laboratory (U.S.)
Engineer Research and Development Center (U.S.)
Series/Report no.: Research report (Cold Regions Research and Engineering Laboratory (U.S.)) ; 284.
Description: Research Report
Abstract: Ionic concentration and water content profiles in frozen bentonite samples subject to a thermal gradient of 0.3°C cm^-1 but different temperature intervals were obtained in the temperature range from 0°C to -12°C in order to determine the extent to which thermal gradients influence the movement of ions in thin films of interfacial water. The moisture content distribution was found to remain virtually unchanged after times ranging from 20 to 54 days, indicating that ionic movement was not affected by mass flow of mobile water in thin films. The ionic distribution profiles were essentially as expected in the absence of a temperature gradient. These observations support the conclusion that thermal gradients have little influence on redistribution of ions in frozen earth materials.
Rights: Approved for public release; distribution is unlimited.
Appears in Collections:Research Report

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