Soil moisture movement during ice segregation

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Journal titleHighway Research Board Bulletin
Pages109118; # of pages: 10
Subjectair moisture transfer; frost heaving; properties of soils; saturation point
AbstractThis paper reports the initial results of a continuing research study of frost action processes in soil undertaken recently by the Division of Building Research of the National Research Council of Canada. Moisture flow to the freezing zone of small soil specimens has been measured under controlled laboratory conditions. The experimental findings agree with the now generally accepted concept of frost heaving outlined by Taber and Beskow. In soil systems where a free water surface exists near but below the freezing zone, the results indicate that moisture flow is dependent on the unsaturated permeability and soil moisture tension characteristics. Both these soil properties integrate the effect of grain size structure, clay composition, and exchange ions among others. Critical desaturation beneath the frost line in some soils appears to act as a barrier to liquid moisture transmission. Since in the heavier-textured soils, rapid moisture transmission continues to much higher tension values, greater heave rates are observed.
Publication date
AffiliationNRC Institute for Research in Construction; National Research Council Canada
Peer reviewedNo
NRC number4278
NPARC number20359009
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Record identifier195e068d-8b4d-46df-b45f-dc84db1b6a2a
Record created2012-07-20
Record modified2016-05-09
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