Use of capacitive and GPR techniques for the non-destructive evaluation of cover concrete

Dérobert, Xavier; Iaquinta, Jean; Klysz, Gilles; Balayssac, Jean-Paul

doi:10.1016/j.ndteint.2007.06.004

Cited by 113 publications

(52 citation statements)

References 17 publications

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“…It can be noted that the dependence of the permittivity with temperature seems to be linear and highly dependent on humidity (correlation coefficients R² are close to 1) in accordance with literature (Breysse et al, 2008;Dérobert et al, 2008;Dérobert et al, 2009).…”

Section: Investigation Resultssupporting

confidence: 90%

“…The capacitive technique consists of the measurement of the resonance frequency of an oscillating system between 30 and 35 MHz and between two metallic electrodes disposed on the surface of the studied concrete (Dérobert, 2010;Dérobert, Iaquinta, Klysz, & Balayssac, 2008;Du Plooy et al, 2013;Taillade, Cottineau, & Aubagnac, 2009). It can be considered that these electrodes form with the studied material a dielectric capacitor.…”

Section: Measurement Protocol For the Capacitive Techniquementioning

confidence: 99%

See 1 more Smart Citation

Temperature influence on electromagnetic measurements of concrete moisture

Chataigner¹,

Saussol²,

Dérobert³

et al. 2014

European Journal of Environmental and Civil Engineering

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In order that non-destructive testing methods become quantitative tools for structure owners, it is necessary to assess their precision and sensitivity to the environment. The presented study deals with two electromagnetic methods classically used to survey road pavements and concrete structures: a radar technique and a capacitive technique. The presented investigations aim at assessing the influence of temperature and moisture on the two methods for measurements realised on concrete slabs. The temperature was ranging from 5 to 45°C and the surrounding relative humidity (RH) evolved between 60 and 90%. The study is part of a more ambitious topic aiming at defining quantitative non-destructive methods to evaluate the water content of concrete structures on site and their state of degradation. The presented work allows assessing the sensitivity of both radar and capacitive techniques to the environmental conditions: temperature and RH. Moreover, the measurement variability of the used capacitive probes with three different sets of electrodes is estimated.

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Section: Investigation Resultssupporting

confidence: 90%

Section: Measurement Protocol For the Capacitive Techniquementioning

confidence: 99%

Temperature influence on electromagnetic measurements of concrete moisture

Chataigner¹,

Saussol²,

Dérobert³

et al. 2014

European Journal of Environmental and Civil Engineering

Self Cite

View full text Add to dashboard Cite

show abstract

“…Nonetheless, capacitive imaging shows considerable promise for the detection of CUI. It is also worth mentioning that work reported elsewhere indicated that such coplanar capacitive sensors are sensitive to moisture content and water intrusion in non-conducting specimens [30][31][32][33], thus this CI approach also has the potential to detect the presence of water within the insulation layer, as an early warning of CUI. Work including the experiments on industrial specimens with actual Corrosion Under Insulation is currently being performed.…”

Section: Discussionmentioning

confidence: 97%

Detecting surface features on conducting specimens through an insulation layer using a capacitive imaging technique

Yin

Hutchins

Chen

2012

NDT & E International

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“…Capacitive sensors have been widely used in many industrial applications, such as proximity/displacement measurement [1,2], material characterization [3][4][5], and non-destructive evaluation (NDE) [6][7][8][9][10]. To design and characterise coplanar capacitive sensors for different measurement requirements, the measurement sensitivity distribution of the CI probe, which describes how effectively each region in the sensing area is contributing to the measured charge signal on the sensing electrode and it can be used to determine the Volume of Influence (VOI) and the imaging ability of a capacitive sensor, need to be studied.…”

Section: Introductionmentioning

confidence: 99%

Negative measurement sensitivity values of planar capacitive imaging probes

Yin

Chen

Hutchins

2014

AIP Conference Proceedings

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The measurement sensitivity distribution of planar capacitive imaging (CI) probes describes how effectively each region in the sensing area is contributing to the measured charge signal on the sensing electrode. It can be used to determine the imaging ability of a CI probe. It is found in previous work that, there are regions in the sensing area where the change of the charge output and the change of targeting physical parameter are of opposite trends. This opposite correlation implies that the measurement sensitivity values in such regions are negative. In this work, the cause of negative sensitivity is discussed. Experiments are also designed and performed so as to verify the existence of negative sensitivity and study the factors that may affect the negative sensitivity distributions.

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Use of capacitive and GPR techniques for the non-destructive evaluation of cover concrete

Cited by 113 publications

References 17 publications

Temperature influence on electromagnetic measurements of concrete moisture

Temperature influence on electromagnetic measurements of concrete moisture

Detecting surface features on conducting specimens through an insulation layer using a capacitive imaging technique

Negative measurement sensitivity values of planar capacitive imaging probes

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