Corrosion characteristics of unprotected post-tensioning strands under stress.

Details

• Creators:
  Fernandez, Joseph ; Hutchison, Michael ; Sagüés, Alberto A. ; Mullins, Gray
• Corporate Creators:
  University of South Florida. Dept. of Civil and Environmental Engineering
• Subject/TRT Terms:
  • Corrosion protection
  • Posttensioning
  • Reinforced concrete
  • Piles (Supports)
  • Tensile strength
  • Bend tests
  • Reinforcing steel
  • Rusting
  • Tendons (Materials)
• Publication/ Report Number:
  BDK84-977-22
• Resource Type:
  Tech Report
• Geographical Coverage:
  Florida
• Corporate Publisher:
  Florida. Dept. of Transportation
• Abstract:
  An investigation was conducted to determine the effect of stress condition ; and environmental exposure on corrosion of post-tensioned strands during ungrouted periods. ; Exposures for periods of up to 4 weeks of stressed, as-received strand placed in tendon ducts ; embedded in concrete and sealed with caps to represent normal practice and without any ; trapped water did not result in any appreciable deterioration as evaluated by visual ; appearance, standardized mechanical tensile testing, limited reverse bend testing, and ; exploratory hydrogen pickup measurements. These results were observed at both an inland ; and a seashore test site. There was, however, notable surface rusting and indications of ; hydrogen pickup by the strand if water was trapped in the ducts or if the steel was exposed to ; moderate salt spray precipitation and especially so with both factors concurrently. Evaluation ; of significance of findings on current practice is presented.
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• Format:
  PDF
• Download URL:
  https://rosap.ntl.bts.gov/view/dot/27343/dot_27343_DS1.pdf
• File Type:
  [PDF - 22.47 MB]
• Collection(s):
  US Transportation Collection
• Main Document Checksum:
  urn:sha256:0ee7254f9a31ab29f05225800856dd3dbc07a315372906a50d60414789d291eb