7. Stress corrosion cracking
7.1 Characteristics of stress corrosion cracking
Prestressed reinforcement is tensioned to between 55% and around 80% of its yield strength, depending on the applicable regulations.
This steel must be placed in a cement-based solid (concrete or grout). However, this protection is sometimes lacking, especially when the grout is poorly injected along the entire length of the reinforcement. Under these conditions, the tensioned steel cracks and eventually breaks.
The mechanisms of metal stress corrosion involve either localized dissolution or hydrogen embrittlement. It is the latter mechanism that applies to non-alloy steel prestressing reinforcement
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Stress corrosion cracking
Conclusion
Bibliography
Events
Show: Batimat Reed Expositions, the international construction show, takes place every two years in Paris (odd-numbered years). http://www.batimat.com
European Corrosion Federation Congress: EUROCOR (session: Corrosion of steel in concrete)
Le Pont" symposium organized by Association Le Pont and AFGC
...Standards and norms
- Béton, spécification, performances, production et conformité - NF EN 206-1 - 2014
- Cement – Part 1: composition, specifications and conformity criteria for common cements (classification index: P15-101-1) - NF EN 197-1 - 2001
- Cement – Part 2: conformity assessment (classification index: P15-101-2) - NF EN 197-2 - 2001
- Corrosion of metals and alloys – Key terms and definitions - ISO 8044 - 1999
Directory
Center français de l'anticorrosion (CEFRACOR), Construction-Building Commission http://www.cefracor.org
Organisme professionnel de prévention du bâtiment et des travaux publics (OPPBT) (Professional organization for building and public works prevention) http://www.oppbt.fr
...
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