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Article: The mechanics of subglacial sediment: An example of new "transitional" behaviour

TitleThe mechanics of subglacial sediment: An example of new "transitional" behaviour
Authors
KeywordsCritical-state soil mechanics
Glacial soil
Laboratory tests
Particle-size distribution
Issue Date2010
PublisherNRC Research Press. The Journal's web site is located at http://pubs.nrc-cnrc.gc.ca/cgi-bin/rp/rp2_desc_e?cgj
Citation
Canadian Geotechnical Journal, 2010, v. 47 n. 7, p. 775-790 How to Cite?
AbstractA series of isotropic compression tests and drained and undrained triaxial compression tests have been performed on glacial sediment from Iceland. Langjökull sediment, which is well graded, is thought to have reached a critical grading during deposition and transportation. Multiple parallel normal compression lines (NCLs) were found, but a unique critical state line (CSL) could be identified. This is unlike other so-called "transitional" soils, whose grading varies between reasonably well graded to gap graded, which tend to have distinct NCLs and critical state lines depending on the specimen density. It is thought that in the case of the Langjökull sediment studied, its particular strain history that involved incessant shearing during deposition accounts for the difference in behaviour. This provides the interesting case of a soil that has been crushed to a critical grading in situ, which depends on the mineralogy of the grains, which was then sampled and tested. Despite the unique grading, samples with a range of different void ratios can be prepared and the combination of grading and density seems to set a fabric that cannot be changed by compression, resulting in multiple parallel NCLs. At the critical state, however, the fabric has been destroyed and the CSL is unique.
Persistent Identifierhttp://hdl.handle.net/10722/129132
ISSN
2015 Impact Factor: 1.877
2015 SCImago Journal Rankings: 2.093
ISI Accession Number ID
References

 

DC FieldValueLanguage
dc.contributor.authorAltuhafi, Fen_HK
dc.contributor.authorBaudet, BAen_HK
dc.contributor.authorSammonds, Pen_HK
dc.date.accessioned2010-12-23T08:32:53Z-
dc.date.available2010-12-23T08:32:53Z-
dc.date.issued2010en_HK
dc.identifier.citationCanadian Geotechnical Journal, 2010, v. 47 n. 7, p. 775-790en_HK
dc.identifier.issn0008-3674en_HK
dc.identifier.urihttp://hdl.handle.net/10722/129132-
dc.description.abstractA series of isotropic compression tests and drained and undrained triaxial compression tests have been performed on glacial sediment from Iceland. Langjökull sediment, which is well graded, is thought to have reached a critical grading during deposition and transportation. Multiple parallel normal compression lines (NCLs) were found, but a unique critical state line (CSL) could be identified. This is unlike other so-called "transitional" soils, whose grading varies between reasonably well graded to gap graded, which tend to have distinct NCLs and critical state lines depending on the specimen density. It is thought that in the case of the Langjökull sediment studied, its particular strain history that involved incessant shearing during deposition accounts for the difference in behaviour. This provides the interesting case of a soil that has been crushed to a critical grading in situ, which depends on the mineralogy of the grains, which was then sampled and tested. Despite the unique grading, samples with a range of different void ratios can be prepared and the combination of grading and density seems to set a fabric that cannot be changed by compression, resulting in multiple parallel NCLs. At the critical state, however, the fabric has been destroyed and the CSL is unique.en_HK
dc.languageengen_US
dc.publisherNRC Research Press. The Journal's web site is located at http://pubs.nrc-cnrc.gc.ca/cgi-bin/rp/rp2_desc_e?cgjen_HK
dc.relation.ispartofCanadian Geotechnical Journalen_HK
dc.rightsCanadian Geotechnical Journal. Copyright © N R C Research Press.-
dc.rightsCreative Commons: Attribution 3.0 Hong Kong License-
dc.subjectCritical-state soil mechanicsen_HK
dc.subjectGlacial soilen_HK
dc.subjectLaboratory testsen_HK
dc.subjectParticle-size distributionen_HK
dc.titleThe mechanics of subglacial sediment: An example of new "transitional" behaviouren_HK
dc.typeArticleen_HK
dc.identifier.openurlhttp://library.hku.hk:4550/resserv?sid=HKU:IR&issn=0008-3674&volume=47&issue=7&spage=775&epage=790&date=2010&atitle=The+mechanics+of+subglacial+sediment:+an+example+of+%27transitional+behaviour%27-
dc.identifier.emailBaudet, BA:baudet@hku.hken_HK
dc.identifier.authorityBaudet, BA=rp01303en_HK
dc.description.naturepublished_or_final_version-
dc.identifier.doi10.1139/T09-136en_HK
dc.identifier.scopuseid_2-s2.0-79955924473en_HK
dc.identifier.hkuros176405en_US
dc.relation.referenceshttp://www.scopus.com/mlt/select.url?eid=2-s2.0-79955924473&selection=ref&src=s&origin=recordpageen_HK
dc.identifier.volume47en_HK
dc.identifier.issue7en_HK
dc.identifier.spage775en_HK
dc.identifier.epage790en_HK
dc.identifier.eissn1208-6010-
dc.identifier.isiWOS:000279739600006-
dc.publisher.placeCanadaen_HK
dc.identifier.scopusauthoridAltuhafi, F=25637246000en_HK
dc.identifier.scopusauthoridBaudet, BA=15841467600en_HK
dc.identifier.scopusauthoridSammonds, P=6603943658en_HK

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