Monitoring of the degradation of concrete structures in environments containing chloride ions

•Monitoring of steel Ecorr and RPL allow an understanding of degradation of reinforced concrete structures stages.•Initiation phase detection of the degradation process could be achieved on the basis of polarization resistance monitoring.•Monitoring of the concrete resistivity enables an effective k...

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Bibliographic Details
Published in:Construction & building materials 2013-10, Vol.47, p.827-832
Main Authors: Romano, Pedro, Brito, Paulo S.D., Rodrigues, Luiz
Format: Article
Language:English
Subjects:
Analysis
Chlorides
Coated reinforcement
Concrete
Corrosion and anti-corrosives
Decomposition (Chemistry)
Dichloropropane
Electric properties
Environmental aspects
Monitoring
Properties
Sensors
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Summary:•Monitoring of steel Ecorr and RPL allow an understanding of degradation of reinforced concrete structures stages.•Initiation phase detection of the degradation process could be achieved on the basis of polarization resistance monitoring.•Monitoring of the concrete resistivity enables an effective knowledge of reinforced concrete structures degradation stages. This study aims to develop a methodology for evaluating the degradation of concrete structures subjected to aggressive environments containing chloride ions based on the use of monitoring systems with sensors permanently installed within the structures. Assays were performed on specimens subjected to controlled media in the laboratory. Measurements of linear polarization resistance (LPR), ionic resistivity of the concrete and corrosion potential of embedded rebars and of chloride content in the concrete probes were made. Analysis of the results based on Evans diagrams, allowed the development of a model based on the simultaneous monitoring over time of the corrosion potential of the steel reinforcement and its LPR could the identification of the various phases of the degradation process of concrete structures, particularly in the initiation phase.
ISSN:0950-0618
DOI:10.1016/j.conbuildmat.2013.05.042