Effects of confining pressure and water content on performance of unsaturated compacted clay under repeated loading

Vinayagamoothy Sivakumar, J. Kodikara, R. O'Hagan, David Hughes, P. Cairns, John D. McKinley

    Research output: Contribution to journalArticle

    21 Citations (Scopus)

    Abstract

    This paper examines the performance of unsaturated soils under repeated loading. As part of the research, a triaxial system was developed that incorporates small-strain measurements using Hall effect transducers, in addition to suction measurements taken using a psychrometer. Tests were conducted on samples of kaolin under constant water mass conditions. The results address the effects of compaction effort and water content at the time of compaction on the overall performance of unsaturated soils, under different amplitudes of loading and different confining pressures. The results show that suction in the sample reduced with increasing number of loading cycles of the same magnitude. The resilient modulus initially increased with increasing water content up to approximately optimum water content, and then reduced substantially with further increase in water content.
    Original languageEnglish
    Pages (from-to)628–640
    Number of pages13
    JournalGéotechnique
    Volume63
    Issue number8
    Early online date01 Feb 2013
    DOIs
    Publication statusPublished - Feb 2013

    Fingerprint

    confining pressure
    Water content
    Clay
    water content
    clay
    suction
    Hall effect transducers
    compaction
    Psychrometers
    Compaction
    Soils
    strain measurement
    Kaolin
    Strain measurement
    kaolin
    transducer
    water mass
    soil
    effect
    Water

    Keywords

    • settlement
    • stiffness
    • unsaturated soils
    • compaction
    • suction

    Cite this

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    abstract = "This paper examines the performance of unsaturated soils under repeated loading. As part of the research, a triaxial system was developed that incorporates small-strain measurements using Hall effect transducers, in addition to suction measurements taken using a psychrometer. Tests were conducted on samples of kaolin under constant water mass conditions. The results address the effects of compaction effort and water content at the time of compaction on the overall performance of unsaturated soils, under different amplitudes of loading and different confining pressures. The results show that suction in the sample reduced with increasing number of loading cycles of the same magnitude. The resilient modulus initially increased with increasing water content up to approximately optimum water content, and then reduced substantially with further increase in water content.",
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    Effects of confining pressure and water content on performance of unsaturated compacted clay under repeated loading. / Sivakumar, Vinayagamoothy; Kodikara, J.; O'Hagan, R.; Hughes, David; Cairns, P.; McKinley, John D.

    In: Géotechnique, Vol. 63, No. 8, 02.2013, p. 628–640.

    Research output: Contribution to journalArticle

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    AU - Sivakumar, Vinayagamoothy

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    AU - Cairns, P.

    AU - McKinley, John D.

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