Soil moisture suction: Its importance and measurement

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Journal titleProceedings of the American Society for Testing and Materials
Pages12051217; # of pages: 13
Subjectproperties of soils; moisture content; vapor pressure; porosity; degre hygrometrique; pression de vapeur; porosite
AbstractPerhaps the greatest development in soil mechanics has been in understanding the mechanical behavior of saturated soils. More recently attempts have been made to deal with soils in the unsaturated state. Under these conditions the behavior of the soil depends to a large extent on the moisture status, which for many purposes can be usefully expressed in terms of "suction," commonly known also as moisture tension or negative hydraulic potential. The identity of suction with relative vapor pressure and hence free energy is given together with the advantages of measuring the former in the region of high relative vapor pressures. Since the behavior of water in soils and many related porous materials is simlilar, the suction concept is not limited to soil. Both the apparatus and technique used for determining soil moisture suction and unsaturated permeability are described together with the use of the methods in soil engineering.
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AffiliationNRC Institute for Research in Construction; National Research Council Canada
Peer reviewedNo
NRC number4994
NPARC number20374733
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Record identifier99573d35-7542-456f-ba52-6b26b28cbd4d
Record created2012-07-23
Record modified2016-05-09
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