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

    28 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

    Keywords

    • settlement
    • stiffness
    • unsaturated soils
    • compaction
    • suction

    ASJC Scopus subject areas

    • Earth and Planetary Sciences (miscellaneous)
    • Geotechnical Engineering and Engineering Geology

    Fingerprint Dive into the research topics of 'Effects of confining pressure and water content on performance of unsaturated compacted clay under repeated loading'. Together they form a unique fingerprint.

    Cite this