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Article: A new procedure for the determination of soilwater retention curves by continuous drying using high-suction tensiometers

TitleA new procedure for the determination of soilwater retention curves by continuous drying using high-suction tensiometers
Authors
KeywordsHigh-suction tensiometers
Laboratory testing
Soil-water retention curve
Unsaturated soils
Issue Date2011
Citation
Canadian Geotechnical Journal, 2011, v. 48 n. 2, p. 327-335 How to Cite?
AbstractSoil-water retention curves (SWRCs) can be determined using high-suction tensiometers (HSTs) following two different procedures that involve either continuous or discrete measurement of suction. In the former case, suction measurements are taken while the sample is permanently exposed to the atmosphere and the soil is continuously drying. In the latter case, the drying or wetting process is halted at different stages to ensure equalization within the sample before measuring suction. Continuous drying has the advantage of being faster; however, it has the disadvantage that the accuracy of mass measurements (necessary for the determination of water content) is affected by the weight and stiffness of the cable connecting the HST to the logger. To overcome this problem, an alternative continuous drying procedure is presented in this paper in which two separate but nominally identical samples are used to obtain a single SWRC; one sample is used for the mass measurements, while a second sample is used for suction measurements. It is demonstrated that the new continuous drying procedure gives SWRCs that are similar to those obtained by discrete drying.
Persistent Identifierhttp://hdl.handle.net/10722/194302
ISSN
2020 Impact Factor: 3.725
2020 SCImago Journal Rankings: 2.032
ISI Accession Number ID

 

DC FieldValueLanguage
dc.contributor.authorLourenço, SDN-
dc.contributor.authorGallipoli, D-
dc.contributor.authorToll, DG-
dc.contributor.authorAugarde, CE-
dc.contributor.authorEvans, FD-
dc.date.accessioned2014-01-30T03:32:25Z-
dc.date.available2014-01-30T03:32:25Z-
dc.date.issued2011-
dc.identifier.citationCanadian Geotechnical Journal, 2011, v. 48 n. 2, p. 327-335-
dc.identifier.issn0008-3674-
dc.identifier.urihttp://hdl.handle.net/10722/194302-
dc.description.abstractSoil-water retention curves (SWRCs) can be determined using high-suction tensiometers (HSTs) following two different procedures that involve either continuous or discrete measurement of suction. In the former case, suction measurements are taken while the sample is permanently exposed to the atmosphere and the soil is continuously drying. In the latter case, the drying or wetting process is halted at different stages to ensure equalization within the sample before measuring suction. Continuous drying has the advantage of being faster; however, it has the disadvantage that the accuracy of mass measurements (necessary for the determination of water content) is affected by the weight and stiffness of the cable connecting the HST to the logger. To overcome this problem, an alternative continuous drying procedure is presented in this paper in which two separate but nominally identical samples are used to obtain a single SWRC; one sample is used for the mass measurements, while a second sample is used for suction measurements. It is demonstrated that the new continuous drying procedure gives SWRCs that are similar to those obtained by discrete drying.-
dc.languageeng-
dc.relation.ispartofCanadian Geotechnical Journal-
dc.subjectHigh-suction tensiometers-
dc.subjectLaboratory testing-
dc.subjectSoil-water retention curve-
dc.subjectUnsaturated soils-
dc.titleA new procedure for the determination of soilwater retention curves by continuous drying using high-suction tensiometers-
dc.typeArticle-
dc.description.naturelink_to_subscribed_fulltext-
dc.identifier.doi10.1139/T10-062-
dc.identifier.scopuseid_2-s2.0-79551662562-
dc.identifier.volume48-
dc.identifier.issue2-
dc.identifier.spage327-
dc.identifier.epage335-
dc.identifier.isiWOS:000287147700012-
dc.identifier.issnl0008-3674-

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