Corrosion of rebars embedded in ancient concrete: correlation between on site testing and corrosion products identification

Autor: Victoire, Elisabeth Marie, Cailleux, Emmanuel, Neff, Delphine, L'Hostis, Valérie, Victoire, E, Vincent, Laurent, Texier, Annick, Bellot-Gurlet, Ludovic, Dillmann, Philippe
Přispěvatelé: Laboratoire de recherche des monuments historiques (LRMH), Centre de Recherche sur la Conservation (CRC ), Muséum national d'Histoire naturelle (MNHN)-Ministère de la Culture et de la Communication (MCC)-Centre National de la Recherche Scientifique (CNRS)-Muséum national d'Histoire naturelle (MNHN)-Ministère de la Culture et de la Communication (MCC)-Centre National de la Recherche Scientifique (CNRS), Cercle des Partenaires du Patrimoine, Laboratoire Pierre Süe (LPS), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS), Laboratoire d'Etude du Comportement des Bétons et des Argiles (LECBA), Service d'Etudes du Comportement des Radionucléides (SECR), Département de Physico-Chimie (DPC), CEA-Direction des Energies (ex-Direction de l'Energie Nucléaire) (CEA-DES (ex-DEN)), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay-CEA-Direction des Energies (ex-Direction de l'Energie Nucléaire) (CEA-DES (ex-DEN)), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay-Département de Physico-Chimie (DPC), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay, Laboratoire de Dynamique Interactions et Réactivité (LADIR), Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS), Muséum national d'Histoire naturelle (MNHN)-Centre National de la Recherche Scientifique (CNRS)-Ministère de la Culture et de la Communication (MCC)-Muséum national d'Histoire naturelle (MNHN)-Centre National de la Recherche Scientifique (CNRS)-Ministère de la Culture et de la Communication (MCC), Türkeri A. N., Şengül Ö.
Jazyk: angličtina
Rok vydání: 2008
Předmět:
Zdroj: 11, Istanbul Technical University, pp.T71_1-9, 2008
Proceedings of the 11th International Conference on Durability of Building Materials and Components
Türkeri A. N.; Şengül Ö. Proceedings of the 11th International Conference on Durability of Building Materials and Components, 11, Istanbul Technical University, pp.T71_1-9, 2008
Popis: International audience; Several hundreds of buildings made of reinforced concrete are now classified as historical in France. Their major pathology is carbonation induced corrosion. The cracking and spalling decays induced by this natural aging process cause loss of material incompatible with the deontology of historical monuments conservation. Therefore it is crucial to understand the corrosion process of embedded steel and to be able to evaluate precisely the corrosion activity on site, in order to predict and may-be to prevent such decays. Current on site non destructive tools for diagnosis operations are potential mapping or corrosion rate measurements. But, such electrochemical techniques are clearly season influenced. Moreover, corrosion rates induced by carbonation are often very low and therefore can be difficult to measure. As a consequence, in areas heavily affected by spalling phenomena, low corrosion activity is often evidenced, so that the interpretation of the results can be problematic. A last hypothesis could be that the oxide layer formed is so resistive that the conductivity necessary for the measurement is lost. In order to better understand the corrosion process of rebars embedded in carbonated concrete, and may be to improve the reliability of those diagnosis tools, it seemed interesting to try to correlate on site measurements with the identification of corrosion patterns. Therefore, on a 56 years old industrial building (Air Purifier of the Meudon Wind tunnel), several sets of potential mapping, resistivity and corrosion rate measurements were performed, respectively in winter time and in spring time, and after medium or heavy moistening. Then reinforced concrete cores were sampled both in supposed active and passive corrosion areas, in order to evaluate the carbonation depth and to identify the corrosion patterns.
Databáze: OpenAIRE
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