STP599

    Trimming Device for Obtaining Direct Shear Specimens from Samples of Stiff Fissured Clay Shale

    Published: Jan 1976


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    Abstract

    A device has been developed at the U. S. Army Engineer Waterways Experiment Station for obtaining direct shear specimens of hard, brittle soils, the use of which has resulted in a reduction in man-hours for specimen preparation from 3 or 4 h to 50 or 60 min per specimen. This device, which has proved to be superior to any previous apparatus used for obtaining direct shear specimens of such soils, is fitted to the base of a commercially available unconfined compression apparatus of the hand-operated type. Samples found untrimmable heretofore can now be tested, because a sample is held rigidly during trimming operations, and the time of exposure to air drying (and subsequent deterioration) has been reduced substantially.

    Keywords:

    soils, soil tests, shear properties, clays, shales, residual stress


    Author Information:

    Durham, GN
    Research civil engineer, Mobility and Environmental Systems Laboratory, U. S. Army Engineer Waterways Experiment Station, Vicksburg, Miss.


    Paper ID: STP39074S

    Committee/Subcommittee: D18.05

    DOI: 10.1520/STP39074S


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