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Corrosion risk and humidity sensors for durability assessment of reinforced concrete structures
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, as well as for new structures as for post-mounting in existing structures, were developed and tested in several materials and at different environmental conditions. Key parameters were concrete composition, chloride content, humidity, temperature. Sensor readings were compared to the response of sensor embedded in concrete during casting, a type, well known and already proved by practical use and other characterization methods of concrete properties, such as water and chloride content and the corrosion state of the metal by visual inspection. 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 improve evaluation procedures for determination of corrosion risk on concrete structures. End-users become able to optimize their maintenance management systems and can therefore reduce costs and traffic impairments.
Corrosion risk and humidity sensors for durability assessment of reinforced concrete structures
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, as well as for new structures as for post-mounting in existing structures, were developed and tested in several materials and at different environmental conditions. Key parameters were concrete composition, chloride content, humidity, temperature. Sensor readings were compared to the response of sensor embedded in concrete during casting, a type, well known and already proved by practical use and other characterization methods of concrete properties, such as water and chloride content and the corrosion state of the metal by visual inspection. 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 improve evaluation procedures for determination of corrosion risk on concrete structures. End-users become able to optimize their maintenance management systems and can therefore reduce costs and traffic impairments.
Corrosion risk and humidity sensors for durability assessment of reinforced concrete structures
Bäßler, R. (author) / Mietz, J. (author) / Raupach, M. (author) / Klinghoffer, O. (author)
2000
12 Seiten, 10 Bilder, 4 Quellen
Conference paper
Storage medium
English
Korrosionseinleitung , Feuchte , Chlorid , Sensor , Stahlbeton , Spannbeton
Corrosion monitoring sensors for durability assessment of concrete structures [3988-06]
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