Asphalt overlays have been commonly used to extend the service life of deteriorated concrete bridge decks. Nonlinear, viscoelastic asphalt has properties that differ considerably from the properties of the underlying portland cement concrete (PCC) deck. The impact echo (IE) method has been extensively used to nondestructively evaluate PCC structures. The method, however, performs differently on asphalt overlays, especially when a membrane is placed between the overlay and the deck. The general recommendation has been to perform IE tests on asphalt overlays in cold weather. The temperature range under which IE can be used, however, is still uncertain. This study was conducted to systematically examine IE performance on asphalt overlays. Three PCC specimens with three types of asphalt overlays―asphalt with a liquid membrane, asphalt with a sheet membrane, and asphalt without a membrane―were tested in a temperature chamber. The three PCC specimens had identical designs, materials, and artificial defects. The nondestructive evaluation (NDE) results from the tests indicate that: (1) 32°F and below is the appropriate temperature range for IE to detect defects in the underlying deck; and (2) membranes can significantly reduce the propagation of waves into the underlying deck.


    Access

    Download

    Check availability in my library

    Order at Subito €


    Export, share and cite



    Title :

    Evaluation of the Impact Echo Method for Concrete Bridge Decks with Asphalt Overlays


    Additional title:

    Transportation Research Record


    Contributors:
    Azari, Hoda (author) / Lin, Shibin (author)


    Publication date :

    2019-02-02




    Type of media :

    Article (Journal)


    Type of material :

    Electronic Resource


    Language :

    English



    Assessment of Ultra-High Performance Concrete Overlays on Concrete Bridge Decks

    Toledo, William K. / Davila, Leticia / Al-Basha, Ahmed J. et al. | TIBKAT | 2021


    Scanning Tour of Polyester Polymer Concrete Overlays on Bridge Decks in California

    Stevens, Robert J. / Guthrie, W. Spencer | TIBKAT | 2021


    Impulse radar evaluation of asphalt-covered bridge decks

    Chung, T. / Carter, C.R. / Masliwec, T. et al. | IEEE | 1992


    Impermeable Asphalt Concrete Layer to Protect and Seal Concrete Bridge Decks

    Haynes, Matthew A. / Coleri, Erdem / Sreedhar, Shashwath | Transportation Research Record | 2019


    Asphalt Surfaces on Steel Bridge Decks

    Hicks, R.Gary | Online Contents | 2000