25 years of field exposure of pre-cracked concrete beams; combined impact of spacers and cracks on reinforcement corrosion

Mette Geiker, Tobias Danner, Alexander Michel, Andres Belda Revert, Oskar Linderoth, Karla Hornbostel

Research output: Contribution to journalArticlepeer-review

Abstract

The state of corrosion of three pre-cracked concrete beams was investigated after 25 years of marine exposure (atmospheric, tidal and submerged). The influence of inadequate plastic spacers was found to overrule the possible impact of bending cracks on reinforcement corrosion. Increased chloride ingress was detected in cracked areas, but very little corrosion was observed where cracks reached the reinforcement. Also, high chloride content was measured in uncracked parts of the beams, but no or very limited corrosion was observed outside spacers and a few cracks. It is hypothesised that corrosion, initiated early at weak spots (here at plastic spacers) can protect the remaining reinforcement from corrosion.

Original languageEnglish
Article number122801
JournalConstruction and Building Materials
Volume286
DOIs
Publication statusPublished - 2021

Subject classification (UKÄ)

  • Reliability and Maintenance
  • Construction Management

Free keywords

  • Cracks
  • Long-term marine exposure
  • Reinforced concrete
  • Reinforcement corrosion
  • Spacers

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