Multiprobe chloride sensor for in situ monitoring of reinforced concrete structures |
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| Affiliation: | 1. Instituto Superior Técnico, DEQ/ICEMS, Av. Rovisco Pais 1049-001 Lisboa, Portugal;2. ZetaCorr, Lda. Urbanização J.M.Simões no 8, 2560 Torres Vedras, Portugal;3. Instituto Superior Técnico, DECivil, Av. Rovisco Pais 1049-001 Lisboa, Portugal;4. Dep. Eng. Cerâmica e Vidro, Universidade de Aveiro, 3810-193 Aveiro, Portugal;1. Laboratoire GeM (UMR 6183), Université de Nantes, CNRS, Centrale Nantes, 2, rue de la Houssinière, 44322 Nantes Cedex 3, France;2. Laboratoire GeM (UMR 6183), ICAM, Département Génie Electrique, 35 Avenue du champ de Man?uvres, 44470 Carquefou, France;3. Laboratoire GeM (UMR 6183), Centrale Nantes, CNRS, Université de Nantes, 1 Rue de la Noë, 44321 Nantes Cedex 3, France;1. Department of Nuclear Engineering, University of California at Berkeley, Berkeley, CA, 94720, USA;2. OLI Systems, Inc., 2 Gateholl Dr., Parsippany, NJ, 07054, USA;3. Department of Civil & Environmental Engineering, University of South Florida, Tampa, FL, 33620, USA;1. School of Civil Engineering, Qingdao University of Technology, Qingdao 266033, PR China;2. Engineering Research Center of Concrete Technology under Marine Environment, Ministry of Education, Qingdao 266033, PR China;3. School of Mathematics, Computer Science and Engineering, City, University of London, London EC1V0HB, United Kingdom |
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| Abstract: | In situ monitoring of the chloride content is one of the most important procedures in preventing and controlling chloride-induced corrosion in reinforced concrete structures. Thus, the development of chloride sensors is of paramount importance for the continuous monitoring of concrete structures. The sensors must present long lifetime and reliability and operate in a wide range of chloride concentrations.The present work aims at developing and testing a sensor based on Ag/AgCl electrodes for in situ monitoring of chloride ions in reinforced concrete structures. Although these electrodes are widely used in analytical experiments due to their sensitivity to the chloride ion, little is known on their behaviour during exposure to alkaline environments, such as those existing in concrete.The multiprobe sensor presented in this work was tested in mortar and concrete specimens, revealing good stability. The results reveal that the Ag/AgCl sensor presents good sensitivity in a wide range of chloride concentrations. |
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