Capacitance-Based Technique for Detection of Reinforcement Bars in Concrete Structures

This paper presents a non-destructive capacitance-based technique for rebars detection in reinforced concrete structure. The proposed technique depends on capacitance variation between the two electrodes of a co-planar capacitive sensor while scanning across different concrete sections with and with...

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Bibliographic Details
Published in:IEEE sensors journal 2021-03, Vol.21 (6), p.7713-7724
Main Authors: Abdelhafeez, Mahmoud, Nassr, Amr A., Abdelraheem, Mohamed
Format: Article
Language:English
Subjects:
Capacitance
Capacitance sensor
Capacitive sensors
Capacitors
Concrete
Concrete slabs
Concrete structures
Electrodes
Finite element analysis
Finite element method
Mathematical models
Nondestructive testing
Rebar
rebars
Reinforced concrete
Reinforcing steels
Scanning
Sensors
structural health monitoring
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Summary:This paper presents a non-destructive capacitance-based technique for rebars detection in reinforced concrete structure. The proposed technique depends on capacitance variation between the two electrodes of a co-planar capacitive sensor while scanning across different concrete sections with and without reinforcement bars. A mathematical model is used to provide meaningful interpretation for the effect of different sensor and concrete parameters on the measured capacitance. The finite element model is built and accompanied by a dedicated experimental setup to confirm theoretical estimations. Simulation and experimental results confirmed a detectable capacitance variation while scanning across the reinforced concrete slab in experimental setup for rebars detection.
ISSN:1530-437X
1558-1748
DOI:10.1109/JSEN.2020.3044979