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Article: Effects of test conditions on shear behaviour of composite soil

TitleEffects of test conditions on shear behaviour of composite soil
Authors
KeywordsStrength and testing of materials
Stress analysis
Issue Date2013
PublisherThomas Telford (ICE Publishing). The Journal's web site is located at http://www.icevirtuallibrary.com/content/serial/geng
Citation
Institution of Civil Engineers Proceedings Geotechnical Engineering, 2013, v. 166 n. 3, p. 310-320 How to Cite?
AbstractTest conditions, such as shearing rate and normal stress, have been long recognised as influencing the measured shear strength of clays and sands. However, their influence on composite soils, which have a wide range of particle sizes, has attracted much less attention from researchers. In this study, a total of 35 direct shear tests at different shearing rates under different normal stresses were conducted on specimens prepared by mixing different proportions of kaolin and glass beads. The changes in volume and water content of sheared specimens and the mesostructure of shear surfaces were studied. The results reveal a positive correlation between volume change and deviation of water content between the shear zone and outer zones, suggesting that the shear-induced volume change occurred primarily in the shear zones. Moreover, high normal stress and low shearing rate produced a relatively small void ratio in the shear zones, facilitating volumetric contraction of the specimen and the development of polished and evenly slickensided shear surfaces. In addition, the residual friction angle of the specimens tested was found to decrease with the increase in normal stress. The high shearing rate caused an increase in residual strength in specimens with low fines fraction, and reduced it in specimens with high fines fraction.
Persistent Identifierhttp://hdl.handle.net/10722/139159
ISSN
2015 Impact Factor: 0.577
2015 SCImago Journal Rankings: 0.697
ISI Accession Number ID

 

DC FieldValueLanguage
dc.contributor.authorLi, Yen_US
dc.contributor.authorChan, LSen_US
dc.contributor.authorYeung, ATen_US
dc.contributor.authorXiang, X-
dc.date.accessioned2011-09-23T05:46:10Z-
dc.date.available2011-09-23T05:46:10Z-
dc.date.issued2013en_US
dc.identifier.citationInstitution of Civil Engineers Proceedings Geotechnical Engineering, 2013, v. 166 n. 3, p. 310-320en_US
dc.identifier.issn1353-2618-
dc.identifier.urihttp://hdl.handle.net/10722/139159-
dc.description.abstractTest conditions, such as shearing rate and normal stress, have been long recognised as influencing the measured shear strength of clays and sands. However, their influence on composite soils, which have a wide range of particle sizes, has attracted much less attention from researchers. In this study, a total of 35 direct shear tests at different shearing rates under different normal stresses were conducted on specimens prepared by mixing different proportions of kaolin and glass beads. The changes in volume and water content of sheared specimens and the mesostructure of shear surfaces were studied. The results reveal a positive correlation between volume change and deviation of water content between the shear zone and outer zones, suggesting that the shear-induced volume change occurred primarily in the shear zones. Moreover, high normal stress and low shearing rate produced a relatively small void ratio in the shear zones, facilitating volumetric contraction of the specimen and the development of polished and evenly slickensided shear surfaces. In addition, the residual friction angle of the specimens tested was found to decrease with the increase in normal stress. The high shearing rate caused an increase in residual strength in specimens with low fines fraction, and reduced it in specimens with high fines fraction.-
dc.languageengen_US
dc.publisherThomas Telford (ICE Publishing). The Journal's web site is located at http://www.icevirtuallibrary.com/content/serial/geng-
dc.relation.ispartofInstitution of Civil Engineers Proceedings Geotechnical Engineeringen_US
dc.rightsCreative Commons: Attribution 3.0 Hong Kong License-
dc.rightsPermission is granted by ICE Publishing to print one copy for personal use. Any other use of these PDF files is subject to reprint fees-
dc.subjectStrength and testing of materials-
dc.subjectStress analysis-
dc.titleEffects of test conditions on shear behaviour of composite soilen_US
dc.typeArticleen_US
dc.identifier.emailLi, Y: li.dennis@hotmail.comen_US
dc.identifier.emailChan, LS: chanls@hku.hk-
dc.identifier.emailYeung, AT: yeungat@hkucc.hku.hk-
dc.identifier.authorityChan, LS=rp00665en_US
dc.description.naturepublished_or_final_version-
dc.identifier.doi10.1680/geng.11.00013-
dc.identifier.hkuros193833en_US
dc.identifier.hkuros207507-
dc.identifier.hkuros242050-
dc.identifier.isiWOS:000318477400007-
dc.publisher.placeUnited Kingdom-

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