A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Evaluation of corrosion of reinforcement in repaired concrete
Corrosion of steel in concrete is a complex phenomenon affected by many environmental factors. A reliable and effective non-destructive approach for assessing and predicting the state of reinforcement corrosion in concrete has not yet been developed. Current methods do not account for the effects of prevailing environmental conditions. Half-cell potential, linear polarization and concrete resistivity measurements are sensitive to the ambient environment, especially oxygen and water in concrete. Completely water-saturated concrete, for instance, can lead to oxygen starvation, resulting in corrosion potential and current values that are lower than normally expected and provide, therefore, a poor prediction of the corrosion state. This paper presents the results of a study of the reinforcement corrosion in repaired concrete slabs taken from an old bridge in Hawkesbury, Ontario and additional results measured on electrochemical cells. Each corrosion measurement technique has its specific characteristics and limitations. The investigation showed that a better and more reliable prediction could be obtained by analyzing the data from above measurements jointly by considering the effects of environmental conditions.
Evaluation of corrosion of reinforcement in repaired concrete
Corrosion of steel in concrete is a complex phenomenon affected by many environmental factors. A reliable and effective non-destructive approach for assessing and predicting the state of reinforcement corrosion in concrete has not yet been developed. Current methods do not account for the effects of prevailing environmental conditions. Half-cell potential, linear polarization and concrete resistivity measurements are sensitive to the ambient environment, especially oxygen and water in concrete. Completely water-saturated concrete, for instance, can lead to oxygen starvation, resulting in corrosion potential and current values that are lower than normally expected and provide, therefore, a poor prediction of the corrosion state. This paper presents the results of a study of the reinforcement corrosion in repaired concrete slabs taken from an old bridge in Hawkesbury, Ontario and additional results measured on electrochemical cells. Each corrosion measurement technique has its specific characteristics and limitations. The investigation showed that a better and more reliable prediction could be obtained by analyzing the data from above measurements jointly by considering the effects of environmental conditions.
Evaluation of corrosion of reinforcement in repaired concrete
Untersuchung der Korrosion der Armierung in repariertem Beton
Qian, S. (author) / Chagnon, N. (author)
2001
12 Seiten, 12 Bilder, 15 Quellen
(Nicht paginiert).
Conference paper
English
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