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Communication

Diagnostics of Reinforcement Conditions in Concrete Structures by GPR, Impact-Echo Method and Metal Magnetic Memory Method

1
CDV—Transport Research Centre, Lisenska 33a, 636 00 Brno, Czech Republic
2
Institute of Forensic Engineering, Brno University of Technology, Purkynova 464/118, 612 00 Brno, Czech Republic
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Institute of Building Structures, Faculty of Civil Engineering, Brno University of Technology, Veveri 95, 602 00 Brno, Czech Republic
4
SQZ Ltd., U Mistni Drahy 939/5, 779 00 Olomouc, Czech Republic
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Preditest Ltd., Pod Višňovkou 23, 140 00 Praha 4, Czech Republic
*
Author to whom correspondence should be addressed.
Academic Editors: Roberto Orosei and Massimiliano Pieraccini
Remote Sens. 2021, 13(5), 952; https://doi.org/10.3390/rs13050952
Received: 31 January 2021 / Revised: 22 February 2021 / Accepted: 25 February 2021 / Published: 3 March 2021
(This article belongs to the Special Issue Trends in GPR and Other NDTs for Transport Infrastructure Assessment)
It is important to use adequately reliable non-destructive methods that would be capable of determining the reinforcement conditions in concrete structures. Three different methods: ground penetrating radar, impact-echo method, and metal magnetic memory method were used for testing laboratory-prepared reinforced concrete beams (with a reinforcing bar of the same diameter along its whole length, reinforcing bar locally impaired, and reinforcing bar interrupted). The ground-penetrating radar proved the correlation of signal parameters with the reinforcing bar condition. An impairment/interruption reinforcing bar appeared in the record from measurements in the transversal and longitudinal direction by changes of the observed depth of the reinforcing bar from the concrete surface and direct wave attenuation. The impact-echo method proved that the shifts of the dominant frequencies from the response signal correspond with the impairment/interruption of the reinforcing bar. Results of diagnostics by the metal magnetic memory method were presented by a magnetogram of the magnetic field strength and field gradient on the measured distance. The changes in the magnetic field strength proved different stress concentration zones due to the reinforcing bar condition. The used non-destructive methods showed that they are capable of indicating the different reinforcement conditions in reinforced concrete beams. This paper indicates in which cases and for what reason it is appropriate to use these three methods and in what way they differ from each other. View Full-Text
Keywords: reinforced concrete beam; steel reinforcing bar; ground penetrating radar; impact-echo method; metal magnetic memory method reinforced concrete beam; steel reinforcing bar; ground penetrating radar; impact-echo method; metal magnetic memory method
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MDPI and ACS Style

Pospisil, K.; Manychova, M.; Stryk, J.; Korenska, M.; Matula, R.; Svoboda, V. Diagnostics of Reinforcement Conditions in Concrete Structures by GPR, Impact-Echo Method and Metal Magnetic Memory Method. Remote Sens. 2021, 13, 952. https://doi.org/10.3390/rs13050952

AMA Style

Pospisil K, Manychova M, Stryk J, Korenska M, Matula R, Svoboda V. Diagnostics of Reinforcement Conditions in Concrete Structures by GPR, Impact-Echo Method and Metal Magnetic Memory Method. Remote Sensing. 2021; 13(5):952. https://doi.org/10.3390/rs13050952

Chicago/Turabian Style

Pospisil, Karel, Monika Manychova, Josef Stryk, Marta Korenska, Radek Matula, and Vaclav Svoboda. 2021. "Diagnostics of Reinforcement Conditions in Concrete Structures by GPR, Impact-Echo Method and Metal Magnetic Memory Method" Remote Sensing 13, no. 5: 952. https://doi.org/10.3390/rs13050952

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