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Proceedings Paper

Review of NDT methods on a weak post-tensioned beam before autopsy
Author(s): X. Derobert; Odile Abraham; Ch. Aubagnac
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Paper Abstract

After the complete demolition of a prestressed concrete bridge in the south of France, a suspected weak posttensioned beam has been put aside for non-destructive testing (NDT). Ground Penetrating Radar (GPR), Ferroscan® (covermeter), gamma-ray radiography and impact-echo (IE) have been tested and their results are discussed after the autopsy of the beam by hydrodemolition. The paper describes how NDT surveys can answer structural engineers need, using complementary NDT approaches. The use of a second technique should provide a better level of answer, while eliminating certain ambiguities either by improving measurement reliability, or by focusing onto doubtful zones for more precise local measurements. Finally, problems not answered by these techniques, described herein are pin pointed.

Paper Details

Date Published: 12 April 2002
PDF: 6 pages
Proc. SPIE 4758, Ninth International Conference on Ground Penetrating Radar, (12 April 2002); doi: 10.1117/12.462220
Show Author Affiliations
X. Derobert, LCPC (France)
Odile Abraham, LCPC (France)
Ch. Aubagnac, LRPC Toulouse (France)


Published in SPIE Proceedings Vol. 4758:
Ninth International Conference on Ground Penetrating Radar
Steven Koppenjan; Hua Lee, Editor(s)

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