Volume 35, Issue 4 (July 2012)

    The Rotating Erosion Testing Apparatus (RETA): A Laboratory Device for Measuring Erosion Rates versus Shear Stresses of Rock and Cohesive Materials

    (Received 18 July 2011; accepted 14 December 2011)

    Published Online: 2012

    CODEN: GTJOAD

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    Abstract

    This paper describes an apparatus for testing the erosion rate of erodible rock and stiff clay as a function of water-flow-induced shear stress. The device, referred to as the Rotating Erosion Testing Apparatus, or RETA, is similar in design to other devices but has a number of advantages. The RETA uses a real-time control unit that monitors the shear stress via the torque imparted to the sample and adjusts its rotational speed to maintain a nearly constant shear stress throughout the test. RETA test results have been used to estimate local sediment erosion rates at structures founded in these types of bed materials.


    Author Information:

    Bloomquist, David
    Civil and Coastal Engineering, University of Florida, Gainesville, FL

    Sheppard, D. Max
    Civil and Coastal Engineering, University of Florida, Gainesville, FL

    Schofield, Sidney
    Dept. of Astronomy, College of Arts and Sciences, University of Florida, Gainesville, FL

    Crowley, Raphael W.
    Civil & Coastal Engineering, University of Florida, Gainesville, FL


    Stock #: GTJ104221

    ISSN: 0149-6115

    DOI: 10.1520/GTJ104221

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    Title The Rotating Erosion Testing Apparatus (RETA): A Laboratory Device for Measuring Erosion Rates versus Shear Stresses of Rock and Cohesive Materials
    Symposium , 0000-00-00
    Committee G02