scholarly journals Vertical electrical impedance evaluation of asphalt overlays on concrete bridge decks

2018 ◽  
Author(s):  
Jared S. Baxter ◽  
W. Spencer Guthrie ◽  
Tenli Waters ◽  
Jeffrey D. Barton ◽  
Brian A. Mazzeo
Keyword(s):  
Electrical Impedance ◽  
Bridge Decks ◽  
Concrete Bridge ◽  
Concrete Bridge Decks ◽  
Asphalt Overlays

Performance of Waterproofing Membranes to Protect Concrete Bridge Decks

2021 ◽  
pp. 036119812110095
Author(s):  
Matthew A. Haynes ◽  
Erdem Coleri ◽  
Ihsan Obaid
Keyword(s):  
Bridge Decks ◽  
Concrete Bridge ◽  
Heavy Vehicles ◽  
Asphalt Overlay ◽  
Concrete Bridge Decks ◽  
High Bond ◽  
Bond Strengths ◽  
Waterproofing Membrane ◽  
Asphalt Overlays ◽  
Transportation Agencies

The installation of waterproofing membranes on concrete bridge decks is a commonly used strategy to prevent water on the roadway surface from penetrating into the deck and to reduce the load and freeze–thaw related damage to the bridge deck. Typically, an asphalt layer is paved over the waterproofing membrane to prevent damage from heavy vehicles. The early failure of asphalt pavement overlays on concrete bridge decks with waterproofing membranes has been recognized as a significant issue by several transportation agencies. Potential reasons for the failure of the asphalt overlay were thought to be poor adhesion between the waterproofing membrane and the asphalt wearing course, and the material properties of the asphalt layer. By determining the most effective waterproofing methods and strategies, this research will serve to decrease repair and replacement costs, and increase the service life of asphalt overlays on concrete bridge decks. The main goals of this study are to provide the industry and transportation agencies with better insight into the failure mechanisms of asphalt overlays on concrete bridge decks and to establish field and laboratory experiments to evaluate the performance of these overlays. From the results of this study, a poured waterproofing membrane was recommended as an ideal membrane for use on concrete bridge decks because of its ease of installation, complete impermeability, and high bond strengths between the concrete deck, membrane layers, and asphalt overlay.

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.

Instrumentation for multi-channel vertical electrical impedance scanning of concrete bridge decks

2020 ◽  
Vol 2 (3) ◽  
pp. 035010
Author(s):  
Jared S Baxter ◽  
Lorin J. Hendricks ◽  
W Spencer Guthrie ◽  
Brian A Mazzeo
Keyword(s):  
Electrical Impedance ◽  
Bridge Decks ◽  
Concrete Bridge ◽  
Concrete Bridge Decks ◽  
Electrical Impedance Scanning
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