Volume 33, Issue 4 (July 2010)

    Modified Null Pressure Plate Apparatus for Measurement of Matric Suction

    (Received 23 April 2009; accepted 29 March 2010)

    Published Online: 2010

    CODEN: GTJOAD

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    Abstract

    The null pressure plate apparatus is conventionally used in the measurement of matric suction of fine-grained unsaturated soil specimens applying the axis-translation technique. This apparatus is typically used to measure the matric suction in the range of 50–500 kPa in a laboratory environment. This paper provides design and construction details of the modifications and improvements to the conventionally used null pressure plate apparatus to promote the accuracy and repeatability of matric suction measurements. Several test results of matric suction measurements on compacted Indian Head till specimens over a suction range of 30–300 kPa are reported using both the modified null pressure plate and the contact filter paper technique. The results indicate that there is a good comparison between these two techniques on identically prepared specimens.


    Author Information:

    Power, Kenton C.
    Jacques Whitford, Ontario, Ottawa

    Vanapalli, Sai K.
    Professor, Univ. of Ottawa, Ontario, Ottawa


    Stock #: GTJ102478

    ISSN: 0149-6115

    DOI: 10.1520/GTJ102478

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    Author
    Title Modified Null Pressure Plate Apparatus for Measurement of Matric Suction
    Symposium , 0000-00-00
    Committee D18