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Evaluation non destructive du gradient de teneur en eau dans les structures en béton armé par résistivité électrique

Abstract : We propose a new measurement procedure that allows drawing a resistivity curve as a function of the spacing between current electrode and potential electrode which is linked to the investigation depth and the water content gradient. The resistivity measurements above the rebars are performed and an inversion procedure to assess the resistivity gradient is carried out. For the experimental part two kinds of measurement are performed on concrete slabs (reinforced and unreinforced). Two gradient types are studied: drying and wetting. The presence of the reinforcement significantly decreases the measurement of the resistivity. The measurements show the interest of the proposed procedure for the study of the water content gradient. Two measurement results were considered in numerical analyses. The simulation shows that it is possible to assess the resistivity gradient and the electrochemical parameters of the rebar via the Butler-Volmer model.
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https://tel.archives-ouvertes.fr/tel-01743727
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Submitted on : Monday, March 26, 2018 - 4:29:28 PM
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  • HAL Id : tel-01743727, version 1

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Anh Quan Nguyen. Evaluation non destructive du gradient de teneur en eau dans les structures en béton armé par résistivité électrique. Architecture, aménagement de l'espace. Université Paul Sabatier - Toulouse III, 2016. Français. ⟨NNT : 2016TOU30380⟩. ⟨tel-01743727⟩

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