36. Informative results from a non-destructive corrosion survey of the soffit of an 80 cm thick post-tensioned bridge deck

Title: 36. Informative results from a non-destructive corrosion survey of the soffit of an 80 cm thick post-tensioned bridge deck
Author(s): U. Schneck
Paper category : conference
Book title: NUCPERF 2009 - Long Term Performance of Cementitious Barriers and Reinforced Concrete in Nuclear Power Plants and Waste Management
Editor(s): V. L'Hostis, R. Gens, C. Gallé
Print-ISBN: 978-2-35158-072-1
e-ISBN: 978-2-35158-087-5
Publisher: RILEM Publications SARL
Publication year: 2009
Pages: 329 - 334
Total Pages: 6
Nb references: 4
Language: English

Abstract: With a non-destructive corrosion survey, corrosion problems on both reinforcement and post-tensioned steel were evaluated on the superstructure of a bridge across the Weisse Elster river. A comparative measurement of rest potentials and surface resistivity on the deck surface and on the soffit of the 80 cm thick bridge deck was used to establish how reliable corrosion measurements can be done from the soffit and under traffic for identifying corrosion problems on the deck surface side.

It has been shown, once again, that non-destructive, full scale corrosion surveys are possible without traffic disruptions. According to the measurement results locations of possible damage can be inspected precisely for safe, object related data evaluation.

Even at thick cross sections rest potentials measured at the soffit are similar to the respective values measured at the deck surface - only shifted by an offset value. Hence it is possible to assess corrosion activity on the top side also by measurements on the soffit. The decision whether possible damaged areas are exhibiting real corrosion problems must be made by supporting investigations. However, area with no corrosion activity can be clearly identified.

Online publication: 2009-11-16
Publication type : full_text
Public price (Euros): 0.00