You are being redirected because this document is part of your ASTM Compass® subscription.
    This document is part of your ASTM Compass® subscription.

    Volume 41, Issue 2 (March 2018)

    Development of a Large-Size Cyclic Direct Simple Shear Device for Characterization of Ground Materials with Oversized Particles

    (Received 28 October 2016; accepted 24 July 2017)

    Published Online: 2018

    CODEN: GTJODJ

      Format Pages Price  
    PDF (2.13 MB) 17 $25   ADD TO CART

    Cite this document

    X Add email address send
    X
      .RIS For RefWorks, EndNote, ProCite, Reference Manager, Zoteo, and many others.   .DOCX For Microsoft Word



    Abstract

    Direct simple shear (DSS) testing, despite its limitations, is one of the most common laboratory element tests in geotechnical engineering practice. The development and validation of a 300-mm diameter DSS device as well as test data generated for two materials with oversized particles, specifically pea gravel and municipal solid waste, are presented. The device has the capability to execute shear wave velocity measurements using both bender elements and accelerometers, as well as monotonic and cyclic testing under constant load or constant volume conditions. Validation testing using Ottawa sand C109 confirmed that the monotonic and cyclic constant volume response of the sand using the large-diameter device was similar to the results presented using conventional-sized DSS test devices. The shear wave velocity measurements using bender elements and accelerometers were found to be practically identical for the tested sand and pea gravel and were also consistent with data reported in the literature. The importance of axial (or vertical) displacement control during constant volume shearing is emphasized. It was found that tests that meet the ASTM D6528-07, Standard Test Method for Consolidated Undrained Direct Simple Shear Testing of Cohesive Soils, threshold of 0.05 % maximum axial strain during shearing may still result in different constant volume response, and it is recommended that (a) the threshold is changed to a maximum of 0.025 % and (b) the evolution of axial strain during constant volume shearing is always reported.

    Author Information:

    Zekkos, Dimitrios
    University of Michigan, Ann Arbor, MI

    Athanasopoulos-Zekkos, Adda
    University of Michigan, Ann Arbor, MI

    Hubler, Jonathan
    University of Michigan, Ann Arbor, MI

    Fei, Xunchang
    University of Michigan, Ann Arbor, MI

    Zehtab, Kaveh H.
    Geocomp Corp., Acton, MA

    Marr, W. Allen
    Geocomp Corp., Acton, MA


    Stock #: GTJ20160271

    ISSN:0149-6115

    DOI: 10.1520/GTJ20160271

    Author
    Title Development of a Large-Size Cyclic Direct Simple Shear Device for Characterization of Ground Materials with Oversized Particles
    Symposium ,
    Committee D18