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Carbon fiber as anode material for cathodic prevention in cementitious materials
RISE, SP – Sveriges Tekniska Forskningsinstitut, CBI Betonginstitutet AB, Hållbara byggnadsverk. Department of Civil and Environmental Engineering, Chalmers University of Technology.
2016 (English)In: International Conference on Durability of Concrete Structures, ICDCS 2016, Purdue University Press, 2016, 300-308 p.Conference paper, Published paper (Refereed)
Abstract [en]

Cathodic prevention (CPre) technique is a promising method and has been used for the past two decades to prevent steel from corrosion in concrete structures. However, wide application of this technique has been restricted due to high costs of anode materials. In order to lower the cost and further improve this technique, carbon fiber composite anode has been introduced as an alternative anode material with affordable price and other outstanding properties. This paper presents the study of using carbon fiber mesh as anode material for long-term cathodic prevention system and the effect of accelerated current on macro- And microstructure of cementitious materials. In the study, electrochemically accelerated tests were developed for the purpose of shortening the experimental time into a manageable range. An estimation tool was used to predict the service life as well. Chemical and microstructure analyses were carried out by laser-ablation inductively-coupled-plasma mass-spectroscopy (LA-ICP-MS) and scanning electron microscope (SEM). Results indicate that calcium to silicon (Ca/Si) ratio and ion re-distribution in the current-affected zone around the anode were changed due to migration and electrochemical reactions. The predicted service life was in general longer than 100 years. Based on the results from this work, it can be concluded that carbon fiber mesh is suitable for the application as anode in long-term cathodic prevention system in cementitious materials.

Place, publisher, year, edition, pages
Purdue University Press, 2016. 300-308 p.
Keyword [en]
carbon fiber anode, cathodic prevention, electrochemical accelerated test, La-icp-ms, SEM, service life
National Category
Composite Science and Engineering Materials Chemistry
Identifiers
URN: urn:nbn:se:ri:diva-15765Scopus ID: 2-s2.0-84987641929OAI: oai:DiVA.org:ri-15765DiVA: diva2:1037389
Conference
5th International Conference on Durability of Concrete Structures, ICDCS 2016, Shenzhen, China, June 30 - July1, 2016
Note

Conference Paper

Available from: 2016-10-14 Created: 2016-10-14 Last updated: 2017-01-09Bibliographically approved

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CiteExportLink to record
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Citation style
  • apa
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  • vancouver
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Language
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  • en-GB
  • en-US
  • fi-FI
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Output format
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