Optical Fiber Sensor for corrosion detection and evolution monitoring in reinforced concrete structures

S. Ali-Alvarez 1 P. Ferdinand 1 S. Magne 1 R. Nogueira 2
1 LCFO - Laboratoire Capteurs Fibres Optiques
DM2I - Département Métrologie Instrumentation & Information : DRT/LIST/DM2I
2 LEPMI - Laboratoire d'Electrochimie et de Physico-chimie des Matériaux et des Interfaces
Abstract : Corrosion of reinforced bars (rebars) in concrete structures is a major issue in civil engineering structures, being its detection and evolution measurement a challenge for applied research. In this project we present a new methodology to detect corrosion and its evolution monitoring, based on the direct rebar-concrete interface changes measurement by the use of Optical Fiber Sensor (OFS) either a Fiber Bragg Grating (FBG) network or Optical Frequency Domain Reflectometry (OFDR) interrogation technique providing distributed strain measurement. A built-in pre-strain profile makes possible the detection of general and pitting corrosion with the same sensor. Accelerated corrosion tests were performed in an electrolytic solution under both pitting and general corrosion. A clear correlation is observed between the evolution of the spectral shift and the corrosion progress thus demonstrating the feasibility of this technique.
Keywords : Concrete construction Concrete buildings Concretes Corrosion Fiber Bragg gratings Corrosion prevention Frequency domain analysis Optical fibers Intelligent structures Pitting Reinforced concrete Structural health monitoring Strain measurement Accelerated corrosion tests Civil engineering structures Corrosion detection Corrosion of reinforced bars Distributed strain measurement Electrolytic solution Interrogation techniques Optical frequency domain reflectometry
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Conference papers
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https://hal-cea.archives-ouvertes.fr/cea-01844698
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Submitted on : Thursday, July 19, 2018 - 3:57:33 PM
Last modification on : Wednesday, September 4, 2019 - 1:40:14 PM

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  • HAL Id : cea-01844698, version 1

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CEA | CNRS | DRT | UNIV-SAVOIE | LIST | LEPMI | UGA | DM2I

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S. Ali-Alvarez, P. Ferdinand, S. Magne, R. Nogueira. Optical Fiber Sensor for corrosion detection and evolution monitoring in reinforced concrete structures. 9th International Workshop on Structural Health Monitoring: A Roadmap to Intelligent Structures, IWSHM 2013, Sep 2013, Standford, United States. pp.1591-1596. ⟨cea-01844698⟩

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