| People | Locations | Statistics |
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| Naji, M. |
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| Motta, Antonella |
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| Aletan, Dirar |
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| Mohamed, Tarek |
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| Ertürk, Emre |
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| Taccardi, Nicola |
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| Kononenko, Denys |
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| Petrov, R. H. | Madrid |
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| Alshaaer, Mazen | Brussels |
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| Bih, L. |
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| Casati, R. |
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| Muller, Hermance |
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| Kočí, Jan | Prague |
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| Šuljagić, Marija |
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| Kalteremidou, Kalliopi-Artemi | Brussels |
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| Azam, Siraj |
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| Ospanova, Alyiya |
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| Blanpain, Bart |
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| Ali, M. A. |
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| Popa, V. |
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| Rančić, M. |
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| Ollier, Nadège |
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| Azevedo, Nuno Monteiro |
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| Landes, Michael |
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| Rignanese, Gian-Marco |
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Fargier, Yannick
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (6/6 displayed)
- 2023Temperature Effect on Electrical Resistivity Measurement Using an Embedded Sensor to Estimate Concrete Water Contentcitations
- 2023Inversion of non-invasive resistivity measurements in fourelectrodes configuration for corrosion characterization in reinforced concrete samples
- 2022Temperature Effect on Electrical Resistivity Measurement Using an Embedded Sensor to Estimate Concrete Water Contentcitations
- 2022Temperature Effect on Electrical Resistivity Measurement Using an Embedded Sensor to Estimate Concrete Water Contentcitations
- 2018Design and implementation of embedded sensors based on electrical resistivity to determine water content profiles in thick concrete structures
- 2016Determining the permittivity profile inside reinforced concrete using capacitive probescitations
Places of action
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conferencepaper
Inversion of non-invasive resistivity measurements in fourelectrodes configuration for corrosion characterization in reinforced concrete samples
Abstract
International audience ; In the context of corrosion diagnosis in reinforced concrete (RC), non-invasive four point electrical measurements represent, by many aspects, an interesting alternative to classical three-point characterization with rebar connection. As a matter of fact, the four-point surface measurement without connection to the rebar, is known to be sensitive to the rebar corrosion. Yet, this rebar effect was first seen as a drawback to the method, initially meant to provide a reliable estimation of the structure durability by assessing the concrete resistivity. The first advantage of this method, namely its absence of rebar connection, comes with a complexification of the current paths within the RC structure. Part of the current diffuses only in the concrete while a residual part will penetrate in the rebar depending on its corrosion current density jcorr. The determination of the rebar corrosion through that kind of measurement is therefore less straightforward than for three-point measurements. However, by multiplying the acquisition points and running an Electrical Resistivity Tomography (ERT), it becomes conceivable to spatially image the RC structure. The four-point resistivity data may be inverted in order to recover both the instantaneous corrosion rate of the rebar as well as the matrix electrical properties and heterogeneities. We developed a laboratory ERT experiment (CorImager®-device from IRIS Instruments) designed to sequentially run multiple four-point measurements on prismatic reinforced mortar specimens of dimensions 10 x 10 x 40 cm3 . The device, composed on the one hand of 96 electrodes distributed over the 4 faces of a corset like antenna (see Fig.1), and on the other hand of an acquisition central enabling multi- channel measurement and switching, provides us with a 3D investigation of our probe. Our samples collection gathers about thirty specimens, most of them armed, differing in the mix or in the rebar preparation. Some have been specifically designed to test the widely ...