Temperature effects on suction measurement using the filter paper technique

Ali Haghighi, Gabriela M. Medero, Fernando A. M. Marinho, Baptiste Mercier, Peter K. Woodward

    Research output: Contribution to journalArticle

    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.




    Original languageEnglish
    Pages (from-to)83-90
    Number of pages8
    JournalGeotechnical Testing Journal
    Volume35
    Issue number1
    DOIs
    Publication statusPublished - 1 Jan 2012

    Keywords

    • thermal effects
    • filter paper
    • calibration curve
    • soil water retention curve

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