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Communication Dans Un Congrès Année : 2018

Design and implementation of embedded sensors based on electrical resistivity to determine water content profiles in thick concrete structures

Résumé

The French national radioactive waste management agency (Andra) aims to insure the durability of thick concrete structures used for waste repository. To this end, concrete water content is one of the main parameters governing the long-term durability of these structures, therefore an accurate estimation of its profile is important. This research focuses on an electrical resistivity technique, which is highly sensitive to the water content in concrete. Our work aims to design a prototype of embedded sensors in concrete structures to measure the resistivity profile with depth and the water content profile after calibration. The study highlights the capability of different types of sensors to measure the resistivity profile of a 30cm-thick concrete section. Several numerical studies are conducted to design different possible configurations of the embedded sensors and to optimize the sensors geometry in order to obtain the most relevant configuration. Several types of sensors are tested on small specimens; for instance Wenner type (aligned and equidistant four-pin probe resistivity method), proved capable of identifying the resistivity profile. The methodology for observing, measuring and monitoring the resistivity profile over time is studied.
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Dates et versions

hal-04533545 , version 1 (05-04-2024)

Identifiants

  • HAL Id : hal-04533545 , version 1

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Joanna Badr, Yannick Fargier, Fabrice Deby, Géraldine Villain, Sérgio Palma Lopes, et al.. Design and implementation of embedded sensors based on electrical resistivity to determine water content profiles in thick concrete structures. 9th European Workshop on Structural Health Monitoring (EWSHM 2018), Jul 2018, Manchester, United Kingdom. ⟨hal-04533545⟩
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