A simple triaxial system for evaluating the performance of unsaturated soils under repeated loading

R. Thom, V. Sivakumar, J. L. Brown, D. Hughes

    Research output: Contribution to journalArticle

    14 Citations (Scopus)

    Abstract

    Unsaturated soils constitute a large proportion of the foundation materials supporting infrastructure throughout the world and they are subject to various loading conditions. This paper describes the development of a simple system for testing unsaturated soils under repeated loading. The equipment was comprised of a modified triaxial cell with hydraulic loading system, hall-effect transducers for on-sample strain measurements, and thermocouple psychrometer for suction measurements. A number of undrained monotonic and repeated loading triaxial tests were performed on compacted samples of kaolin clay in order to attest the newly developed system. The results yielded some useful information on the resilient modulus and permanent deformation of a soil when subjected to repeated loading. There is some difference between the failure deviator stress of samples subjected to repeated and monotonic loading, though repeated loading continued to result in a significant permanent deformation. This paper is aimed at demonstrating the key features of the equipment using preliminary data generated as part of the on-going research.
    LanguageEnglish
    Pages107-114
    JournalGeotechnical Testing Journal
    Volume31
    Issue number2
    DOIs
    Publication statusPublished - 2008

    Fingerprint

    Soils
    Hall effect transducers
    Psychrometers
    Kaolin
    Strain measurement
    Thermocouples
    Clay
    Hydraulics
    Testing

    Keywords

    • Unsaturated soils
    • repeated loading
    • triaxial test

    Cite this

    Thom, R. ; Sivakumar, V. ; Brown, J. L. ; Hughes, D. / A simple triaxial system for evaluating the performance of unsaturated soils under repeated loading. 2008 ; Vol. 31, No. 2. pp. 107-114.
    @article{46da14625af44dbdab1c5bf9ed3f07a2,
    title = "A simple triaxial system for evaluating the performance of unsaturated soils under repeated loading",
    abstract = "Unsaturated soils constitute a large proportion of the foundation materials supporting infrastructure throughout the world and they are subject to various loading conditions. This paper describes the development of a simple system for testing unsaturated soils under repeated loading. The equipment was comprised of a modified triaxial cell with hydraulic loading system, hall-effect transducers for on-sample strain measurements, and thermocouple psychrometer for suction measurements. A number of undrained monotonic and repeated loading triaxial tests were performed on compacted samples of kaolin clay in order to attest the newly developed system. The results yielded some useful information on the resilient modulus and permanent deformation of a soil when subjected to repeated loading. There is some difference between the failure deviator stress of samples subjected to repeated and monotonic loading, though repeated loading continued to result in a significant permanent deformation. This paper is aimed at demonstrating the key features of the equipment using preliminary data generated as part of the on-going research.",
    keywords = "Unsaturated soils, repeated loading, triaxial test",
    author = "R. Thom and V. Sivakumar and Brown, {J. L.} and D. Hughes",
    year = "2008",
    doi = "10.1520/GTJ100963",
    language = "English",
    volume = "31",
    pages = "107--114",
    number = "2",

    }

    A simple triaxial system for evaluating the performance of unsaturated soils under repeated loading. / Thom, R.; Sivakumar, V.; Brown, J. L.; Hughes, D.

    Vol. 31, No. 2, 2008, p. 107-114.

    Research output: Contribution to journalArticle

    TY - JOUR

    T1 - A simple triaxial system for evaluating the performance of unsaturated soils under repeated loading

    AU - Thom, R.

    AU - Sivakumar, V.

    AU - Brown, J. L.

    AU - Hughes, D.

    PY - 2008

    Y1 - 2008

    N2 - Unsaturated soils constitute a large proportion of the foundation materials supporting infrastructure throughout the world and they are subject to various loading conditions. This paper describes the development of a simple system for testing unsaturated soils under repeated loading. The equipment was comprised of a modified triaxial cell with hydraulic loading system, hall-effect transducers for on-sample strain measurements, and thermocouple psychrometer for suction measurements. A number of undrained monotonic and repeated loading triaxial tests were performed on compacted samples of kaolin clay in order to attest the newly developed system. The results yielded some useful information on the resilient modulus and permanent deformation of a soil when subjected to repeated loading. There is some difference between the failure deviator stress of samples subjected to repeated and monotonic loading, though repeated loading continued to result in a significant permanent deformation. This paper is aimed at demonstrating the key features of the equipment using preliminary data generated as part of the on-going research.

    AB - Unsaturated soils constitute a large proportion of the foundation materials supporting infrastructure throughout the world and they are subject to various loading conditions. This paper describes the development of a simple system for testing unsaturated soils under repeated loading. The equipment was comprised of a modified triaxial cell with hydraulic loading system, hall-effect transducers for on-sample strain measurements, and thermocouple psychrometer for suction measurements. A number of undrained monotonic and repeated loading triaxial tests were performed on compacted samples of kaolin clay in order to attest the newly developed system. The results yielded some useful information on the resilient modulus and permanent deformation of a soil when subjected to repeated loading. There is some difference between the failure deviator stress of samples subjected to repeated and monotonic loading, though repeated loading continued to result in a significant permanent deformation. This paper is aimed at demonstrating the key features of the equipment using preliminary data generated as part of the on-going research.

    KW - Unsaturated soils

    KW - repeated loading

    KW - triaxial test

    U2 - 10.1520/GTJ100963

    DO - 10.1520/GTJ100963

    M3 - Article

    VL - 31

    SP - 107

    EP - 114

    IS - 2

    ER -