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    Volume 43, Issue 6 (November 2015)

    Reliability of Analysis Methods for Identifying Dispersive Clays

    (Received 9 July 2014; accepted 9 March 2015)

    Published Online: 2015

    CODEN: JTEVAB

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    Abstract

    Numerous methods for identifying dispersive clays have been proposed: the pinhole test, the double hydrometer test, the crumb test, the sodium adsorption ratio test, the percentage of the exchangeable sodium cation test, and a number of different auxiliary tests. However, the results of these methods have been in some cases inconsistent. Therefore, in this study, identification tests and conventional laboratory index tests for 34 cohesive soil samples collected from 10 domestic and foreign engineering projects completed by the China Institute of Water Resources and Hydropower Research over the last 20 years were analyzed and compared. The results showed that the dispersive grade of clay was not directly related to the gradation, specific gravity, liquid limit, or plasticity index but was closely related to the soil pH value. Moreover, the pinhole test was not suitable for identifying the dispersion of soil with a low clay content or high expansion.


    Author Information:

    Wei, Yingqi
    State Key Laboratory of Simulation and Regulation of Water Cycle in River Basin, China Institute of Water Resources and Hydropower Research, Beijing,

    Cai, Hong
    State Key Laboratory of Simulation and Regulation of Water Cycle in River Basin, China Institute of Water Resources and Hydropower Research, Beijing,

    Wen, Yanfeng
    State Key Laboratory of Simulation and Regulation of Water Cycle in River Basin, China Institute of Water Resources and Hydropower Research, Beijing,

    Yan, Jun
    State Key Laboratory of Simulation and Regulation of Water Cycle in River Basin, China Institute of Water Resources and Hydropower Research, Beijing,

    Xiao, Jianzhang
    State Key Laboratory of Simulation and Regulation of Water Cycle in River Basin, China Institute of Water Resources and Hydropower Research, Beijing,

    China Institute of Water Resources and Hydropower Research, Beijing,


    Stock #: JTE20140283

    ISSN:0090-3973

    DOI: 10.1520/JTE20140283

    Author
    Title Reliability of Analysis Methods for Identifying Dispersive Clays
    Symposium ,
    Committee D18