Volume 42, Issue 2 (March 2014)

    Improved Rolling Dynamic Deflectometer for Continuous Pavement Deflection Measurements

    (Received 28 August 2012; accepted 19 August 2013)

    Published Online: 2014

    CODEN: JTEOAD

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    Abstract

    Unlike discrete testing methods, the rolling dynamic deflectometer (RDD) performs continuous measurements. Thus, it is a powerful screening and evaluation tool for quickly characterizing large sections of highway and airfield pavements with little danger of missing critical pavement features. RDD testing applications have involved (1) pavement forensic investigations, (2) delineations of areas to be repaired, (3) selections of rehabilitation treatments, measurements of relative improvements due to the rehabilitation, and (4) monitoring of changes with time (trafficking and environmental loading). This paper discusses the efforts to improve the velocity of RDD testing up to 5 mph (8.0 km/h) while minimizing the accuracy and resolution of deflection data. The research consisted of the development of a velocity-improved rolling sensor and the field evaluation of its new sensor system. The velocity-improved rolling sensor and the enhanced data processing were tested in both flexible and rigid pavements at varied velocities. The enhanced RDD system potentially enabled testing velocities of up to 5 mph (8.0 km/h) in thin flexible pavements (i.e., farm-to-market roads) and up to 3 mph (4.8 km/h) in rigid pavements.


    Author Information:

    Nam, BooHyun
    Assistant Professor, Dept. of Civil, Environmental Construction, and Construction Engineering, Univ. of Central Florida, Orlando, FL

    Stokoe, Kenneth H.
    Professor, Dept. of Civil Engineering, The Univ. of Texas at Austin, Austin, TX


    Stock #: JTE20120262

    ISSN: 0090-3973

    DOI: 10.1520/JTE20120262

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    Author
    Title Improved Rolling Dynamic Deflectometer for Continuous Pavement Deflection Measurements
    Symposium , 0000-00-00
    Committee E07