Improved Rolling Dynamic Deflectometer for Continuous Pavement Deflection Measurements

    Authors

    B. Nam;K. H. Stokoe

    Comments

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    Abbreviated Journal Title

    J. Test. Eval.

    Keywords

    rolling dynamic deflectometer; continuous deflection profile; pavement; evaluation; Materials Science, Characterization & Testing

    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.

    Journal Title

    Journal of Testing and Evaluation

    Volume

    42

    Issue/Number

    2

    Publication Date

    1-1-2014

    Document Type

    Article

    Language

    English

    First Page

    312

    Last Page

    327

    WOS Identifier

    WOS:000335332200006

    ISSN

    0090-3973

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