DEROBERT, Xavier; LATASTE, Jean-Francois; BALAYSSAC, Jean Pierre; LAURENS, S.

doi:10.1016/j.ndteint.2017.03.006

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DEROBERT, Xavier
Laboratoire Géophysique et évaluation non destructive [IFSTTAR/GERS/GeoEND]

LATASTE, Jean-Francois

BALAYSSAC, Jean Pierre
Laboratoire Matériaux et Durabilité des constructions [LMDC]

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NDT & E International. 2017, vol. 89, p. 9-29

Elsevier

Résumé en anglais

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.< Réduire

Mots clés

MESURE

HUMIDITE

INCERTITUDE

RESISTIVITE

CHLORURE

BETON

Mots clés en anglais

Concrete

Chloride

Measurement uncertainty

Humidity

Radar

Resistivity

Capacitance

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Evaluation of chloride contamination in concrete using electromagnetic non-destructive testing methods

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