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    Volume 41, Issue 2 (March 2018)

    Large-Scale Combination Direct Shear/Simple Shear Device for Tire-Derived Aggregate

    (Received 27 September 2016; accepted 24 July 2017)

    Published Online: 2018

    CODEN: GTJODJ

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    Abstract

    This paper describes a novel large-scale device capable of performing both direct shear and simple shear tests to evaluate shear deformation and strength properties of Type B tire-derived aggregate (TDA). The device consists of stacked tubular steel members that can be locked as upper and lower rigid sections to displace relative to one another in direct shear or pinned at the ends to translate in simple shear. For both configurations, the TDA specimen has a length of 3,048 mm, a width of 1,220 mm, and an initial height up to 1,830 mm. The upper rigid section of the device can also be used to conduct interface direct shear tests. Vertical stress is applied to the top surface of the specimen using deadweights and horizontal shearing force is applied using two hydraulic actuators in displacement-control mode. Typical results from internal direct shear, concrete interface direct shear, and cyclic simple shear tests are presented. In direct shear mode, the device allows for mobilization of peak shear strength and, in simple shear mode, for evaluation of shear stiffness and damping ratio under large strain conditions for TDA with large particle size.

    Author Information:

    Fox, Patrick J.
    Dept. of Civil and Environmental Engineering, The Pennsylvania State University, PA

    Thielmann, Stuart S.
    GeoEngineers, Inc., Tacoma, WA

    Sanders, Michael J.
    Dept. of Structural Engineering, University of California - San Diego, CA

    Latham, Christopher
    Dept. of Structural Engineering, University of California - San Diego, CA

    Ghaaowd, Ismaail
    Dept. of Structural Engineering, University of California - San Diego, CA

    McCartney, John S.
    Dept. of Structural Engineering, University of California - San Diego, CA


    Stock #: GTJ20160245

    ISSN:0149-6115

    DOI: 10.1520/GTJ20160245

    Author
    Title Large-Scale Combination Direct Shear/Simple Shear Device for Tire-Derived Aggregate
    Symposium ,
    Committee D18