scholarly journals Rapid multichannel impact-echo scanning of concrete bridge decks from a continuously moving platform

2017 ◽  
Author(s):  
Brian A. Mazzeo ◽  
Jacob Larsen ◽  
Joseph McElderry ◽  
W. Spencer Guthrie
Keyword(s):  
Bridge Decks ◽  
Concrete Bridge ◽  
Impact Echo ◽  
Concrete Bridge Decks ◽  
Moving Platform

High-Speed Acoustic Impact-Echo Sounding of Concrete Bridge Decks

2020 ◽  
Vol 39 (3) ◽  
Author(s):  
Lorin J. Hendricks ◽  
Jared S. Baxter ◽  
Yao Chou ◽  
Mavrik Thomas ◽  
Enoch Boekweg ◽  
...  
Keyword(s):  
High Speed ◽  
Bridge Decks ◽  
Concrete Bridge ◽  
Impact Echo ◽  
Concrete Bridge Decks ◽  
Acoustic Impact ◽  
Echo Sounding

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

2019 ◽  
Vol 2673 (2) ◽  
pp. 436-444 ◽  
Author(s):  
Hoda Azari ◽  
Shibin Lin
Keyword(s):  
Bridge Decks ◽  
Cold Weather ◽  
Concrete Bridge ◽  
Portland Cement Concrete ◽  
Impact Echo ◽  
Temperature Range ◽  
Concrete Bridge Decks ◽  
Propagation Of Waves ◽  
Asphalt Overlays ◽  
The Impact

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.

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