Corrosion Resistance of Grouted Post-Tensioning Systems

The increased popularity of post-tensioned bridge construction in the United States has led to concerns about corrosion and its impact on the life cycle of these bridges. New materials have been produced by commercial manufacturers and are being used in post-tensioning systems. New construction methods have also been developed and include procedures recommended by the Post-Tensioning Institute (PTI). One major problem that agencies face today is the difficulty of providing sufficient monitoring and inspection techniques for bonded post-tensioned structures. Condition surveys are often limited to visual inspections for signs of cracking, spalling, and surface rust staining. This limited technique can often overlook the deterioration of prestressing steel and can fail to detect the potential for very severe and sudden collapses. Using the recommendations from previous Center for Transportation Research (CTR) research, the research team designed and developed new specimens. To establish the corrosion resistance of the post-tensioning strands to be used in the new specimens, the researchers performed preliminary companion tests. These strands were then used in combinations with different duct, coupler, and anchorage types and were subjected to highly aggressive exposure for either 4 or 6 years. The specimens were monitored continuously and eventually autopsied to evaluate the final corrosion resistance of each strand, duct, coupler, and anchorage combination.

• Record URL:
  http://tti.tamu.edu/documents/0-4562-S.pdf
• Summary URL:
  https://library.ctr.utexas.edu/Presto/search/SearchResults_ClearCriteria.aspx?q=(catalog.ID=(32932))
• 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:
  • Breen, John E
  • Kreger, Michael E
  • Kilduff, Andrew L
  • Moyer, Kevin L
  • McCool, Gregory E
  • Ahern, Michael E
  • Kalina, Ryan D
  • MacLean, Sean
  • Luthi, Tanya
  • Icaza, Juan J
  • Diephuis, Jeffrey R
• Publication Date: 2014

Language

• English

Media Info

• Media Type: Digital/other
• Edition: Project Summary
• Pagination: 2p

Subject/Index Terms

• TRT Terms: Bridges; Corrosion resistance; Durability; Grout; Posttensioning; Specimens; Structural health monitoring
• Geographic Terms: Texas
• Subject Areas: Bridges and other structures; Design; Highways; Materials; I24: Design of Bridges and Retaining Walls;

Filing Info

• Accession Number: 01538286
• Record Type: Publication
• Report/Paper Numbers: 0-4562
• Files: TRIS, ATRI, USDOT, STATEDOT
• Created Date: Sep 25 2014 8:59AM