STP874

    Effects of Various Liquids on Clay Soil: Bentonite Slurry Mixtures

    Published: Jan 1985


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    Abstract

    Slurry-wall backfill materials were placed in double-ring permeameters to evaluate their permeability to water, xylene, and methanol. Permeability determinations were made using double-ring permeameters because these devices separate flow that occurs near the sidewalls from flow occurring through the central portion of the specimens. The use of double-ring devices appears to overcome some of the limitations of fixed-wall and flexible-wall permeameters. Fixed-wall devices may have sidewall flow, and flexible-wall devices may be inappropriate for testing soft specimens such as a slurry mixture.

    Permeability tests on materials that are to contain waste leachates are typically done using water [0.01 N calcium sulfate (CaSO4)] as the permeant liquid. The results of this study show that permeability values determined with water may be misleading. Low permeabilities were obtained with water, but both xylene and methanol caused large permeability increases in the soil-slurry mixtures.

    Keywords:

    permeability, organic liquids, double-ring permeameters, sidewall flow, fixed-wall permeameter, flexible-wall permeameter, slurry wall, bentonite, materials tests, clays


    Author Information:

    Anderson, DC
    Senior associate, associate, and senior associate, K. W. Brown & Associates, Inc., College Station, TX

    Crawley, W
    Senior associate, associate, and senior associate, K. W. Brown & Associates, Inc., College Station, TX

    Zabcik, JD
    Senior associate, associate, and senior associate, K. W. Brown & Associates, Inc., College Station, TX


    Paper ID: STP34571S

    Committee/Subcommittee: D18.05

    DOI: 10.1520/STP34571S


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