Temperature Effects on Suction Measurement Using the Filter Paper Technique

    Volume 35, Issue 1 (January 2012)

    ISSN: 0149-6115

    CODEN: GTJOAD

    Published Online: 15 September 2011

    Page Count: 8


    Haghighi, Ali
    School of the Built Environment, Heriot-Watt Univ.,

    Medero, Gabriela M.
    School of the Built Environment, Heriot-Watt Univ.,

    Marinho, Fernando A. M.
    Escola Politécnica da Universidade de São Paulo,

    Mercier, Baptiste
    School of the Built Environment, Heriot-Watt Univ.,

    Woodward, Peter K.
    School of the Built Environment, Heriot-Watt Univ.,

    (Received 15 November 2010; accepted 25 July 2011)

    Abstract

    This paper presents the results of an experimental study of thermal effects on filter paper calibration curves used to obtain the soil suction. When the temperature is significantly different from ambient values, it is essential to consider the influence of temperature on the filter paper calibration curves to obtain a reliable soil suction measurement. The calibration curve of Whatman No. 42 filter paper was determined at 10°C, 25°C, and 50°C using the vapor equilibrium technique with sodium chloride solutions at different concentrations and the axis translation technique. The experimental results showed a major influence of temperature on the filter paper calibration curves. Using the obtained experimental data a calibration equation was proposed, taking into account the effect of temperature. The obtained calibration curves were then used to determine the soil water retention curve of kaolin clay, which showed lower retention capacity at higher temperatures.


    Paper ID: GTJ103575

    DOI: 10.1520/GTJ103575

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    Author
    Title Temperature Effects on Suction Measurement Using the Filter Paper Technique
    Symposium , 0000-00-00
    Committee D18