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    Volume 40, Issue 1 (January 2017)

    Calibration of a Coupled Model to Predict the Magnitude of Suction Generated by Osmotic Technique With PES Membranes and Temperature Effect

    (Received 10 November 2015; accepted 28 September 2016)

    Published Online: 09 January 2017

    CODEN: GTJODJ

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    Abstract

    Using the osmotic technique to control soil suction requires a reliable correlation between concentration of soluble polyethylene glycol (PEG) and suction generated under isothermal condition. Experimental data to establish such correlation can be found in the literature but they tend to be incomplete and mainly pertain to cellulose membranes. Recent research has shown that polyethersulfon membranes (PES) are a better alternative than cellulose membranes in terms of durability and reliability. However, no complete calibration dataset is available for applying the osmotic technique to account for use of PES membranes and effects of different PEG molecular weights, concentrations and temperature. This study intends to fill such a gap by providing reliable and comprehensive experimental data. The response of PES membranes was investigated over a range of temperature varying from 20°C to 40°C and the results were used to calibrate a coupled model that allows a better prediction of suction generated by the osmotic technique. The influence of PEG molecular weight has been evidenced and can be incorporated in the model.


    Author Information:

    Yuan, S.
    Priority Research Centre for Geotechnical and Materials Modelling, The Univ. of Newcastle, Callaghan,

    Liu, X.
    Key Laboratory of High-Speed Railway Engineering of Ministry of Education, School of Civil Engineering, Southwest Jiaotong University, Chengdu,

    Priority Research Centre for Geotechnical and Materials Modelling, The Univ. of Newcastle, Callaghan,

    Buzzi, O.
    Priority Research Centre for Geotechnical and Materials Modelling, The Univ. of Newcastle, Callaghan,


    Stock #: GTJ20150262

    ISSN:0149-6115

    DOI: 10.1520/GTJ20150262

    Author
    Title Calibration of a Coupled Model to Predict the Magnitude of Suction Generated by Osmotic Technique With PES Membranes and Temperature Effect
    Symposium ,
    Committee D18