Evaluation of Corrosion Resistance of Improved Post-tensioning Materials after Long-term Exposure Testing

Ten full-scale post-tensioned beam specimens were subject to 4 years of aggressive cyclic ponded saltwater exposure. Three of those specimens were additionally exposed to saltwater spray once per month on one anchorage face. Non-destructive monitoring was conducted during the exposure period. This consisted of half-cell potential measurements, AC impedance measurements (for specimens with fully encapsulated tendons), and regular visual inspections. Chloride samples were extracted from the specimens at the end of exposure. After 4 years, the specimens were autopsied, and all reinforcing elements from the middle of each specimen were examined for corrosion and damage. Anchorage regions were also autopsied and examined for corrosion. Duct systems included galvanized metal ducts, plastic ducts, and encapsulated duct systems. Strand types included conventional strand, hot dipped galvanized strand, copper clad strand, and stainless steel strand. Complete observations are presented.

• Record URL:
  http://www.utexas.edu/research/ctr/pdf_reports/0_4562_4.pdf
• Record URL:
  https://rosap.ntl.bts.gov/view/dot/37875
• Supplemental Notes:
  • Project Title: Corrosion Resistance of Grouted Post-Tensioning Systems.
• Corporate Authors:

  University of Texas, Austin

  Center for Transportation Research, 1616 Guadalupe Street
  Austin, TX  United States  78701-1255

  Texas Department of Transportation

  Research and Technology Implementation Office, P.O. Box 5080
  Austin, TX  United States  78763-5080

  Federal Highway Administration

  1200 New Jersey Avenue, SE
  Washington, DC  United States  20590
• Authors:
  • Kalina, R D
  • MacLean, S
  • Ahern, M E
  • Breen, J E
  • Wood, S L
• Publication Date: 2011-10

Language

• English

Media Info

• Media Type: Digital/other
• Edition: Technical Report
• Features: Appendices; Figures; Photos; References; Tables;
• Pagination: 185p

Subject/Index Terms

• TRT Terms: Accelerated tests; Anchorages; Beams; Chlorides; Corrosion; Ducts; Encapsulation; Galvanized metals; Laboratory tests; Plastics; Posttensioning; Reinforcing materials; Tendons (Materials)
• Uncontrolled Terms: Chloride exposure; Half-cell potentials
• Subject Areas: Bridges and other structures; Highways; Maintenance and Preservation; Materials; I34: Steels and Metals; I60: Maintenance;

Filing Info

• Accession Number: 01374500
• Record Type: Publication
• Report/Paper Numbers: FHWA/TX-11/0-4562-4, Report 0-4562-4
• Contract Numbers: 0-4562
• Files: NTL, TRIS, USDOT, STATEDOT
• Created Date: Jul 3 2012 3:29PM