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  • Effect of Flocculated and Dispersed Microfabrics on Mechanical Properties of Reconstitued Kaolin Soils

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    WongPUB3127.pdf (709.1Kb)
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    Version of Record (VoR)
    Author(s)
    Wong, Steven Tung-Yew
    Ong, Dominic Ek Leong
    Arulrajah, Arul
    Griffith University Author(s)
    Ong, Dominic E.L.
    Year published
    2014
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    Abstract
    Mechanical properties of kaolin clay and silt with different geometric arrangements of microfabric, namely being flocculated and dispersed, are investigated. The samples were prepared and consolidated to 100 kPa by reconstituting commercially available kaolin powder with different pore fluids. A series of Ko consolidated undrained triaxial tests with different effective vertical stresses and axial strain rates were performed on the kaolin specimens to study its behaviour in shear and subsequently its shear strength parameters. Compressibility of kaolin was explored through tests carried out using the one dimensional consolidation ...
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    Mechanical properties of kaolin clay and silt with different geometric arrangements of microfabric, namely being flocculated and dispersed, are investigated. The samples were prepared and consolidated to 100 kPa by reconstituting commercially available kaolin powder with different pore fluids. A series of Ko consolidated undrained triaxial tests with different effective vertical stresses and axial strain rates were performed on the kaolin specimens to study its behaviour in shear and subsequently its shear strength parameters. Compressibility of kaolin was explored through tests carried out using the one dimensional consolidation test. The results show that the arrangement of microfabric will affect the mechanical properties of kaolin. For the normally consolidated dispersed samples at 300 kPa effective vertical stress, when ‘peak’ deviatoric stress occurs, the shear resistance of kaolin has shown a continuously reduction (termed strain softening). However, flocculated and dispersed microfabrics under normal consolidation showed no distinct peak strength up to axial strain of 20.0%. Such observation is useful to relate to the clayey soils most likely found at the transition regions between river and sea, where they tend to behave more like a dispersed sample studied herein due to appropriate concentration of salt in the ambient pore fluids and the presence of cations sodium. The (dispersed) clayey soils at those areas also tend to experience strain softening than those (flocculated) clayey soils along the riverbank with fresh water.
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    Conference Title
    SDPS 2014 Malaysia: Smart Innovative Societies [19th International Conference on Transformative Research in Science and Engineering, Business and Social Innovation]
    Publisher URI
    https://www.swinburne.edu.my/sdps2014/
    Copyright Statement
    © 2014 Society for Design and Process Science. The attached file is reproduced here in accordance with the copyright policy of the publisher. Please refer to the journal website for access to the definitive, published version.
    Subject
    Civil Geotechnical Engineering
    Sedimentology
    Publication URI
    http://hdl.handle.net/10072/376317
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    • Conference outputs

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