Evaluation of chloride contamination in concrete using electromagnetic non-destructive testing methods
Language
en
Article de revue
This item was published in
NDT & E International. 2017, vol. 89, p. 9-29
Elsevier
English Abstract
We present the results of the sensitivity of some electromagnetic non-destructive testing (NDT) methods to chloride contamination. The NDT methods are resistivity, using a quadripole probe, capacitive technique, with few ...Read more >
We present the results of the sensitivity of some electromagnetic non-destructive testing (NDT) methods to chloride contamination. The NDT methods are resistivity, using a quadripole probe, capacitive technique, with few sets of electrodes, and radar technique, using different bistatic configurations. A laboratory study was carried out involving three different concretes with different water to cement ratios. The concretes were conditioned with different degrees of NaCl saturation by means of three solutions containing 0 g/L, 30 g/l or 120 g/l. The solution was homogenized in the concrete by using a specific procedure. Results show that the EM techniques are very sensitive to the chloride content and saturation rate and, on a second level, to the porosity. Multi- linear regression processing was performed to estimate the level of sensitivity of the NDT measurements to the three indicators. Values of ten ND observables are presented and discussed. At last, the uncertainties of the regression models are studied on a real structure in a tidal zone.Read less <
Keywords
MESURE
HUMIDITE
INCERTITUDE
RESISTIVITE
CHLORURE
BETON
English Keywords
Concrete
Chloride
Measurement uncertainty
Humidity
Radar
Resistivity
Capacitance
Origin
Hal imported