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dc.contributor.authorBlaker, Øyvind
dc.contributor.authorDeGroot, Don J.
dc.date.accessioned2020-08-20T05:53:03Z
dc.date.available2020-08-20T05:53:03Z
dc.date.created2020-07-10T08:26:40Z
dc.date.issued2020
dc.identifier.issn1090-0241
dc.identifier.urihttps://hdl.handle.net/11250/2673059
dc.description.abstractThis paper presents a laboratory investigation of undrained triaxial shear behavior of a natural low-plasticity silt from Halden, Norway in the intact, disturbed, and reconstituted states. Sherbrooke block sample and reconstituted specimens were subjected to simulated tube sampling in a triaxial stress path cell system prior to reconsolidation and undrained shear to assess the effects of disturbance on undrained shear behavior, undrained shear strength, and effective stress friction angle. Shear stress and pore-pressure development were evaluated relative to that measured for the undisturbed reference state, i.e., that measured on specimens from the intact block sample. Specimens trimmed from fixed-piston tube samples collected from the field site were tested for comparative purposes. Collectively, the results demonstrated that neither the volumetric method of evaluating sample quality for clays nor shear wave velocity tracked sample disturbance well for this low-plasticity silt. Relative to the reference intact block sample tests, simulated tube sampling resulted in an increasingly pronounced dilative-type behavior during postdisturbance undrained shear and a general increase in undrained shear strength. Specimens from the block sample that were subjected to simulated tube sample disturbance had similar stress–strain behavior as that from conventional anisotropically consolidated triaxial compression tests conducted on specimens from the tube samples, suggesting that significant alteration of the intact soil state occurred during tube sampling. Practical suggestions for selection of undrained shear strength for intact low-plasticity silts that exhibit dilative behavior such as the Halden silt are proposed.
dc.language.isoeng
dc.titleIntact, Disturbed, and Reconstituted Undrained Shear Behavior of Low-Plasticity Natural Silt
dc.typePeer reviewed
dc.typeJournal article
dc.description.versionacceptedVersion
dc.source.volume146
dc.source.journalJournal of Geotechnical and Geoenvironmental Engineering
dc.source.issue8
dc.identifier.doi10.1061/(ASCE)GT.1943-5606.0002299
dc.identifier.cristin1819157
dc.relation.projectNorges forskningsråd: 245650
cristin.ispublishedtrue
cristin.fulltextpostprint
cristin.qualitycode2


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