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Embedded sensors for the monitoring of corrosion parameters in concrete structures

Authors: Andrade Perdrix, Carmen; Martínez Sierra, Isabel;

Embedded sensors for the monitoring of corrosion parameters in concrete structures

Abstract

[FR] La corrosion des armatures est un des principaux problèmes de durabilité des structures en béton. La corrosion entraîne plusieurs endommagements structurels qui affectent le fonctionnement et la sécurité des structures. Le placement de capteurs électrochimiques de la corrosion dans le béton pourrait donner des alertes afin de réparer la structure avant d'atteindre des niveaux dangereux. Il existe un nombre croissant de structures en béton qui font l'objet d'un suivi afin de contrôler leur durabilité. Mais il y a très peu des résultats d'interprétation des valeurs obtenues publiés dans la littérature. L'expérience acquise jusqu'à présent montre la difficulté d'interprétation des données recueillies, en raison des variations induites par la température et l'humidité et aussi la difficulté d'utiliser ces données pour prédire l’évolution future du processus. En ce qui concerne la corrosion, les paramètres les plus importants à suivre et à évaluer sont : le potentiel de corrosion, le taux de corrosion, la résistivité du béton (mesurée par la méthode de la résistance de polarisation, Rp), ils semblent être les paramètres plus utiles à mettre en corrélation avec les paramètres de l'environnement pour la caractérisation des processus de corrosion. Dans cette présentation, plusieurs exemples de résultats de potentiel de corrosion, de résistivité et de vitesse de corrosion sont présentés. Les résultats obtenus permettent de corréler la corrosion et les paramètres environnementaux.

[EN] Corrosion of reinforcement is one of the main durability problems of concrete structures. The corrosion induces several structural damages which affect the serviceability and the safety of concrete structures. The structural risk is promoting the possibility of embeded sensors which could give alerts in order to repair the structure before reaching dangerous levels of damage. There are an increasing number of concrete structures that are being monitored in order to control their durability. However almost no results of the interpretation of the values obtained can be found in the literature. The experience until now shows the difficulty of interpretation of the data collected due to the influence of temperature and moisture on them and how to use these data to predict future evolution of the process. About the corrosion parameters to be monitored and evaluated, corrosion potential, concrete resistivity and corrosion rate (measured by the polarization resistance method, Rp), seem to be the most useful parameters to be correlated with the environmental parameters for the characterization of the corrosion process. In this paper, several examples of on site records of the corrosion potential, concrete resistivity and corrosion rates are presented. The results obtained allow correlating corrosion and environmental parameters.

Trabajo presentado en el 7th International Symposium on Nondestructive Testing in Civil Engineering (NDTCE 2009), celebrado en Nantes (Francia), del 30 de junio al 3 de julio de 2009

The authors thank the financial support from the Spanish Ministry of Education and Science under the CONSOLIDER SEDUREC of the program INGENIO 2010.

Country
Spain
Related Organizations
Keywords

Linear polarization, Corrosion rate, Electrochemical techniques, On-site values

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selected citations
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This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
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popularity
This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
BIP!Popularity provided by BIP!
influence
This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
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impulse
This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.
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