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Article: Effects of particle shape on shear strength of clay-gravel mixture
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TitleEffects of particle shape on shear strength of clay-gravel mixture
 
AuthorsLi, Y
Huang, R
Chan, LS
Chen, J
 
KeywordsClay-gravel mixture
Particle shape
Shear strength
 
Issue Date2012
 
PublisherSpringer.
 
CitationKSCE Journal of Civil Engineering, 2012 [How to Cite?]
DOI: http://dx.doi.org/10.1007/s12205-012-1613-8
 
AbstractSoils containing gravel-sized particles attract much less attention from researchers than clay and sand, though they may be the most commonly encountered materials in geotechnical engineering practice, especially in mountainous area. Large direct shear tests are carried out in this study to investigate the shear behavior of such soil mixtures, with emphasis on influences of shape properties (symmetry and smoothness) of gravel particles. The tested samples are prepared by mixing kaolin and gravel-sized particles (2.0 mm<d<15 mm) of different shape at various volumetric proportions (40, 70 and 100%). Three types of gravel are used, i.e., glass beads, river cobbles and crushed granite fragments. The applied normal stresses is 150 kPa and the shearing rate is 0.006 mm/min. Results are presented in terms of shear dilatancy, and peak and constant volume friction angle. Based on the analysis of the test results, it is found: (1) increasing gravel content increases both peak and constant volume friction angle; (2) both particle symmetry (quantified by elongation) and surface smoothness (quantified by convexity) play an important role in peak and constant volume friction, though they work in different ways; (3) increasing convexity decreases constant volume friction angle, while increases peak friction angle; and (4) increasing elongation increases constant volume friction angle, but decreases peak friction angle.
 
ISSN1226-7988
2012 Impact Factor: 0.383
2012 SCImago Journal Rankings: 0.230
 
DOIhttp://dx.doi.org/10.1007/s12205-012-1613-8
 
DC FieldValue
dc.contributor.authorLi, Y
 
dc.contributor.authorHuang, R
 
dc.contributor.authorChan, LS
 
dc.contributor.authorChen, J
 
dc.date.accessioned2012-11-06T08:14:53Z
 
dc.date.available2012-11-06T08:14:53Z
 
dc.date.issued2012
 
dc.description.abstractSoils containing gravel-sized particles attract much less attention from researchers than clay and sand, though they may be the most commonly encountered materials in geotechnical engineering practice, especially in mountainous area. Large direct shear tests are carried out in this study to investigate the shear behavior of such soil mixtures, with emphasis on influences of shape properties (symmetry and smoothness) of gravel particles. The tested samples are prepared by mixing kaolin and gravel-sized particles (2.0 mm<d<15 mm) of different shape at various volumetric proportions (40, 70 and 100%). Three types of gravel are used, i.e., glass beads, river cobbles and crushed granite fragments. The applied normal stresses is 150 kPa and the shearing rate is 0.006 mm/min. Results are presented in terms of shear dilatancy, and peak and constant volume friction angle. Based on the analysis of the test results, it is found: (1) increasing gravel content increases both peak and constant volume friction angle; (2) both particle symmetry (quantified by elongation) and surface smoothness (quantified by convexity) play an important role in peak and constant volume friction, though they work in different ways; (3) increasing convexity decreases constant volume friction angle, while increases peak friction angle; and (4) increasing elongation increases constant volume friction angle, but decreases peak friction angle.
 
dc.description.naturelink_to_subscribed_fulltext
 
dc.identifier.citationKSCE Journal of Civil Engineering, 2012 [How to Cite?]
DOI: http://dx.doi.org/10.1007/s12205-012-1613-8
 
dc.identifier.doihttp://dx.doi.org/10.1007/s12205-012-1613-8
 
dc.identifier.issn1226-7988
2012 Impact Factor: 0.383
2012 SCImago Journal Rankings: 0.230
 
dc.identifier.urihttp://hdl.handle.net/10722/173983
 
dc.languageeng
 
dc.publisherSpringer.
 
dc.publisher.placeGermany
 
dc.relation.ispartofKSCE Journal of Civil Engineering
 
dc.rightsThe original publication is available at www.springerlink.com
 
dc.subjectClay-gravel mixture
 
dc.subjectParticle shape
 
dc.subjectShear strength
 
dc.titleEffects of particle shape on shear strength of clay-gravel mixture
 
dc.typeArticle
 
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<item><contributor.author>Li, Y</contributor.author>
<contributor.author>Huang, R</contributor.author>
<contributor.author>Chan, LS</contributor.author>
<contributor.author>Chen, J</contributor.author>
<date.accessioned>2012-11-06T08:14:53Z</date.accessioned>
<date.available>2012-11-06T08:14:53Z</date.available>
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