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  • Undrained cyclic behavior of bentonite-sand mixtures and factors affecting it

    Author(s)
    Gratchev, IB
    Sassa, K
    Osipov, VI
    Fukuoka, H
    Wang, G
    Griffith University Author(s)
    Gratchev, Ivan
    Year published
    2007
    Metadata
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    Abstract
    In this work, the cyclic behavior of bentonite-sand mixtures and factors affecting it were studied by means of a ring-shear apparatus and a scanning electron microscope. It was found that bentonite content had a significant influence on the liquefaction potential of the studied soils. A small amount of bentonite in the mixtures would cause the formation of "loose" microstructures, resulting in the occurrence of rapid liquefaction under cyclic loading, while a high bentonite content would cause the formation of clay matrixes, thus raising the soil resistance to liquefaction. In addition, the effect of pore water chemistry on ...
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    In this work, the cyclic behavior of bentonite-sand mixtures and factors affecting it were studied by means of a ring-shear apparatus and a scanning electron microscope. It was found that bentonite content had a significant influence on the liquefaction potential of the studied soils. A small amount of bentonite in the mixtures would cause the formation of "loose" microstructures, resulting in the occurrence of rapid liquefaction under cyclic loading, while a high bentonite content would cause the formation of clay matrixes, thus raising the soil resistance to liquefaction. In addition, the effect of pore water chemistry on the cyclic behavior of a high plasticity bentonite-sand mixture was carefully examined. It was also found that the presence of ions in pore water would change the clay microfabric, making it more open and thus more vulnerable to liquefaction. Finally, the effects of loading frequency on the cyclic behavior of mixtures with different amounts of bentonite were investigated. It was found that as the bentonite content increased, the influence became more pronounced.
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    Journal Title
    Geotechnical and Geological Engineering
    Volume
    25
    Issue
    3
    DOI
    https://doi.org/10.1007/s10706-006-9115-2
    Subject
    Civil engineering
    Civil geotechnical engineering
    Publication URI
    http://hdl.handle.net/10072/38864
    Collection
    • Journal articles

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