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Chloride ingress in concrete exposed to marine environment - field data up to 10 years exposure
RISE, SP – Sveriges Tekniska Forskningsinstitut, SP Bygg och Mekanik.
2003 (Swedish)Report (Refereed)
Abstract [sv]

This report presents the results from a research project financed by the Swedish National Road Administration. In this project about 60 chloride and moisture profiles have been measured from various types of concrete specimens exposed to marine environment for more than 10 years. Totally about 240 chloride profiles measured after 0.5, 1, 2, 5 and 10 years exposure and about 100 moisture profiles after 5 and 10 years exposure have been collected and formatted into similar worksheets in order to facilitate the establishment of database. These collected data have been used for curve-fitting to diffusion functions based on Fick’s second law, for validation of the rapid migration test, and for verification of the prediction model ClinConc. According to the results it seems that the curve-fitted diffusion coefficient DF2 decreases with the exposure time only in the first five years period, and afterwards this decrease tendency becomes unclear. The rapid migration test, or called the CTH method, has been proven applicable to various types of concrete including silica fume and fly ash. There exist reasonably good linear relationships in logarithmic scale between DCTH and DF2. The lowest DCTH value well corresponds to the lowest chloride ingress in the group of concrete with similar water-binder ratios. The ClinConc model has also been successfully used to predict the chloride ingress profiles of various types of concrete. The predicted profiles are in general in fairly good agreement with the measured ones, although an extension coefficient has to be introduced to extend the laboratory diffusivity to the field one. Further experimental investigation is needed to verify this extension coefficient.

Place, publisher, year, edition, pages
2003. , 61 p.
Series
SP Rapport, ISSN 0284-5172 ; 2003:16
National Category
Natural Sciences
Identifiers
URN: urn:nbn:se:ri:diva-4615Local ID: 2232ISBN: 91-7848-948-02 OAI: oai:DiVA.org:ri-4615DiVA: diva2:962253
Note
Pris: 150SEK. Beställes via BiblioteketBoras@sp.seAvailable from: 2016-09-07 Created: 2016-09-07Bibliographically approved

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CiteExportLink to record
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Citation style
  • apa
  • harvard1
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  • en-US
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