Periodic mapping of reinforcement corrosion in intrusive chloride contaminated concrete with GPR

•Development of Ground Penetrating Radar (GPR) based techniques for corrosion monitoring.•Periodic monitored accelerated reinforcement corrosion with GPR.•Investigate the tendencies of the GPR signal changes and their governing mechanisms.•Successfully visualized the accelerated reinforcement corros...

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Bibliographic Details
Published in:Construction & building materials 2014-09, Vol.66, p.671-684
Main Authors: Hong, Shuxian, Lai, Wallace Wai-Lok, Wilsch, Gerd, Helmerich, Rosemarie, Helmerich, Robert, Günther, Tobias, Wiggenhauser, Herbert
Format: Article
Language:English
Subjects:
Chemical properties
Chloride contamination
Concrete
Corrosion
Ground penetrating radar
Mechanical properties
Periodic monitoring
Reinforcement corrosion
Steel
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Summary:•Development of Ground Penetrating Radar (GPR) based techniques for corrosion monitoring.•Periodic monitored accelerated reinforcement corrosion with GPR.•Investigate the tendencies of the GPR signal changes and their governing mechanisms.•Successfully visualized the accelerated reinforcement corrosion process even from the every early stage.•Novel GPR data processing methods for mapping the chloride contamination. This paper presents an experimental effort for developing a novel reinforcement corrosion monitoring technique based on Ground Penetrating Radar (GPR). Experiments were carried out to periodically monitor the accelerated reinforcement corrosion process with GPR. The data were processed in both time and time–frequency domains to investigate the tendencies of GPR signal attribute changes related with corrosion, moisture and chloride contamination. Data processing methods were proposed to visualize the reinforcement corrosion and chloride distribution with target specified signal attribute mapping. Half-Cell Potential (HCP) and Laser-Induced Breakdown Spectroscopy (LIBS) methods were employed to verify the GPR observations.
ISSN:0950-0618
DOI:10.1016/j.conbuildmat.2014.06.019