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A platform for research: civil engineering, architecture and urbanism
Monitoring moisture uptake and delamination in CFRP-reinforced concrete structures with electrochemical impedance sensors
Electrochemical impedance spectroscopy (EIS) sensors have been used to inspect carbon fiber reinforced polymer (CFRP) -reinforced concrete structures exposed to a variety of test conditions. Similar specimens were also used to investigate the detection of delamination between the CFRP and the concrete using a modified wedge test configuration. The use of external electrodes attached to the CFRP surface, coupled with the embedded rebar, provided the best results. Equivalent circuit modeling was used to analyze the impedance spectra. Several circuit parameters, especially the capacitance and constant phase element (CPE) magnitude, correlated very well with both bonded area/delamination and moisture. Both parameters exhibit a linear relationship with delamination area. The capacitance also showed a linear relationship with moisture content while the CPE was more strongly dependent on moisture. Differences in the response of the specimens subjected to the different exposure conditions were seen and explained based on the moisture uptake of the various specimens.
Monitoring moisture uptake and delamination in CFRP-reinforced concrete structures with electrochemical impedance sensors
Electrochemical impedance spectroscopy (EIS) sensors have been used to inspect carbon fiber reinforced polymer (CFRP) -reinforced concrete structures exposed to a variety of test conditions. Similar specimens were also used to investigate the detection of delamination between the CFRP and the concrete using a modified wedge test configuration. The use of external electrodes attached to the CFRP surface, coupled with the embedded rebar, provided the best results. Equivalent circuit modeling was used to analyze the impedance spectra. Several circuit parameters, especially the capacitance and constant phase element (CPE) magnitude, correlated very well with both bonded area/delamination and moisture. Both parameters exhibit a linear relationship with delamination area. The capacitance also showed a linear relationship with moisture content while the CPE was more strongly dependent on moisture. Differences in the response of the specimens subjected to the different exposure conditions were seen and explained based on the moisture uptake of the various specimens.
Monitoring moisture uptake and delamination in CFRP-reinforced concrete structures with electrochemical impedance sensors
Überwachung der Feuchteaufnahme und Schichtablösung in kohlefaserverstärkten Betonstrukturen mit einem elektrochemischen Impedanzsensor
Davis, G.D. (author) / Rich, M.J. (author) / Drzal, L.T. (author)
Journal of Nondestructive Evaluation ; 23 ; 1-9
2004
9 Seiten, 10 Bilder, 1 Tabelle, 37 Quellen
Article (Journal)
English
| British Library Online Contents | 2004
| British Library Conference Proceedings | 2015
Sensors to Monitor CFRP/Concrete Bond in Beams Using Electrochemical Impedance Spectroscopy
| British Library Online Contents | 2005
Sensors to Monitor CFRP-Concrete Bond in Beams Using Electrochemical Impedance Spectroscopy
| Online Contents | 2005