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Comparison of NDT methods for assessment of a concrete bridge deck / Taekeun Oh in Journal of engineering mechanics, Vol. 139 N° 3 (Mars 2013) 

Public ISBD [article]  in Journal of engineering mechanics > Vol. 139 N° 3 (Mars 2013) . - 305–314. Titre : Comparison of NDT methods for assessment of a concrete bridge deck Type de document : texte imprimé Auteurs : Taekeun Oh, Auteur ; Seong-Hoon Kee, Auteur ; Ralf W. Arndt, Auteur Année de publication : 2013 Article en page(s) : 305–314. Note générale : applied mechanics Langues : Anglais (eng) Mots-clés : NDT  Air-coupled  impact  echo  Corrosion-induced  delamination  Infrared  thermography  Chain  drag  Concrete  bridge  deck Résumé : The field application of three different nondestructive tests (NDTs)—air-coupled impact echo (IE), infrared (IR) thermography, and sounding (chain drag)—are evaluated in this paper, where an actual in-service concrete bridge deck is tested. Two different contactless IE test equipment sets are deployed as part of an effort to develop new rapid measurement methods. The IE data are presented as two-dimensional frequency maps, and the IR data are presented as temperature maps over the tested area. Sounding (chain-drag) result maps are also presented. For verification of the location of near-surface delamination damage, eight drilled core samples were extracted from the test area. The results obtained from each of the individual NDT methods show reasonably good agreement with the drilled cores in terms of locating near-surface delamination. Finally, the NDT methods are compared across general performance criteria, considering accuracy, testing practicality, and costs. The analysis shows that all of the evaluated NDT methods are comparable, and the chain-drag method is not more accurate and reliable for detection of shallow delamination in the deck. ISSN : 0733-9399 En ligne : http://ascelibrary.org/doi/abs/10.1061/%28ASCE%29EM.1943-7889.0000441 [article] Comparison of NDT methods for assessment of a concrete bridge deck [texte imprimé] / Taekeun Oh, Auteur ; Seong-Hoon Kee, Auteur ; Ralf W. Arndt, Auteur . - 2013 . - 305–314. applied mechanics Langues : Anglais (eng) in Journal of engineering mechanics > Vol. 139 N° 3 (Mars 2013) . - 305–314. Mots-clés : NDT  Air-coupled  impact  echo  Corrosion-induced  delamination  Infrared  thermography  Chain  drag  Concrete  bridge  deck Résumé : The field application of three different nondestructive tests (NDTs)—air-coupled impact echo (IE), infrared (IR) thermography, and sounding (chain drag)—are evaluated in this paper, where an actual in-service concrete bridge deck is tested. Two different contactless IE test equipment sets are deployed as part of an effort to develop new rapid measurement methods. The IE data are presented as two-dimensional frequency maps, and the IR data are presented as temperature maps over the tested area. Sounding (chain-drag) result maps are also presented. For verification of the location of near-surface delamination damage, eight drilled core samples were extracted from the test area. The results obtained from each of the individual NDT methods show reasonably good agreement with the drilled cores in terms of locating near-surface delamination. Finally, the NDT methods are compared across general performance criteria, considering accuracy, testing practicality, and costs. The analysis shows that all of the evaluated NDT methods are comparable, and the chain-drag method is not more accurate and reliable for detection of shallow delamination in the deck. ISSN : 0733-9399 En ligne : http://ascelibrary.org/doi/abs/10.1061/%28ASCE%29EM.1943-7889.0000441