Change search
CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf
Mapping corrosion of steel in reinforced concrete structures
RISE, SP – Sveriges Tekniska Forskningsinstitut, SP Bygg och Mekanik.
2002 (English)Report (Refereed)
Abstract [en]

This report presents the results from a research project financed by the Swedish National Road Administration. In this project an instrument composed of computerised galvanostatic supplier and data acquisition system has been developed at SP for electrochemical measurement. With the help of this instrument, different measurement conditions and parameters could be evaluated and many electrochemical measurement data could be collected for later analysis. A numerical model based on a 2-D FEM (2-Dimensional Finite Element Method) has been established for modelling the corrosion measurement. With the help of this model, the measurement parameters could be optimised and the effectively confined current could be evaluated. Based on the results of numerical modelling and the studies on the small and big reinforced concrete slabs, a rapid method for measuring corrosion rate has been developed. The method involves a short time galvanostatic pulse measurement followed with the numerical calculation for correcting the preset polarisation current from the measured data, so as to produce “true” resistance values related to the confined area. Owing to its rapidity (in a few seconds per measurement), this method provides a useful tool for mapping corrosion rate of reinforcement steel in concrete structures. The results from a comparative measurement on both small and big reinforced concrete slabs show that the corrosion rate measured by the new rapid method is quite comparable with that measured by Gecor, which uses the modulated confinement technique. The results from the field measurements on two old concrete bridges also show that the corrosion extent measured by the new rapid method is in good agreement with the visual observations.

Place, publisher, year, edition, pages
2002. , p. 62
Series
SP Rapport, ISSN 0284-5172 ; 2002:32
National Category
Natural Sciences
Identifiers
URN: urn:nbn:se:ri:diva-4585Local ID: 2236ISBN: 91-7848-923-7 (print)OAI: oai:DiVA.org:ri-4585DiVA, id: diva2:962223
Available from: 2016-09-07 Created: 2016-09-07 Last updated: 2020-12-01Bibliographically approved

Open Access in DiVA

fulltext(1790 kB)1802 downloads
File information
File name FULLTEXT01.pdfFile size 1790 kBChecksum SHA-512
a4ea05cf4ec3d46bb7a7ab9f92c9382b6e4fe837b5227c4196f5d164c550551bd81fbee67dc54b6b4d7847b7f310809c433c7bbb05dc979b6053518f16b30ec6
Type fulltextMimetype application/pdf

By organisation
SP Bygg och Mekanik
Natural Sciences

Search outside of DiVA

GoogleGoogle Scholar
Total: 1804 downloads
The number of downloads is the sum of all downloads of full texts. It may include eg previous versions that are now no longer available

isbn
urn-nbn

Altmetric score

isbn
urn-nbn
Total: 79 hits
CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf