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Proceedings Paper

Corrosion monitoring sensors for durability assessment of concrete structures
Author(s): Ralph Baessler; Juergen Mietz; Michael Raupach; Oskar Klinghoffer
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Paper Abstract

Corrosion initiation and propagation of reinforcement can be monitored by means of different sensors embedded in concrete. Different sensor types for monitoring of time to corrosion initiation, usable in existing structures, were developed and tested in several materials and at different environmental conditions. Key parameters were concrete composition, chloride content, humidity, temperature. Readings of sensors to be installed in existing structures were compared to (1) the response of sensors embedded in concrete during casting, a type, well known and already proved by practical use and (2) other methods for characterization of concrete properties, such as water and chloride content and the corrosion state of the metal by visual inspection and weight loss measurements. First results show a good correlation of the longtime behavior of corrosion potential, current and resistance obtained from sensors installed in existing specimens and pre-embedded sensors. Ingress of chloride concentration and change of humidity inside the concrete could be detected and enabled an estimation of the possible corrosion behavior. These results combined with other results obtained during an EU research project will contribute to the improved evaluation procedures for deterioration of concrete structures. End-users become able to optimize their maintenance management systems and therefore costs and traffic impairments will be reduced.

Paper Details

Date Published: 20 April 2000
PDF: 8 pages
Proc. SPIE 3988, Smart Structures and Materials 2000: Smart Systems for Bridges, Structures, and Highways, (20 April 2000); doi: 10.1117/12.383168
Show Author Affiliations
Ralph Baessler, Bundesanstalt fuer Materialforschung und -pruefung (Germany)
Juergen Mietz, Bundesanstalt fuer Materialforschung und -pruefung (Germany)
Michael Raupach, Rheiniusch-Westfaelische Hochschule Aachen (Germany)
Oskar Klinghoffer, Force Institute (Denmark)

Published in SPIE Proceedings Vol. 3988:
Smart Structures and Materials 2000: Smart Systems for Bridges, Structures, and Highways
S.-C. Liu, Editor(s)

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