Alternate Corrosion Resistant Protection System for Post- Tensioned Bridge Members

The development of new post-tensioning materials and systems in recent years has made some of the durability research in this area obsolete. The current research is evaluating the corrosion resistance of both existing and potential post-tensioning materials as well as examining construction practices for the new systems. The research is funded by the Federal Highway Administration (FHWA) and Texas Department of Transportation (TXDOT). The new post-tensioning systems being investigated include combinations of strand, duct (with and without couplers), bearing plated and electrical isolation. The experimental program includes both long-term exposure tests and accelerated corrosion tests. The long-term program is modeled after previous post-tensioning durability research at the University of Texas. To provide continuity between the two projects and comparable results, this research used construction practices, exposure methods and monitoring conditions similar to those used in the previous research, with the exception that the current specimen uses only one-eighth of the materials used in previous specimens. The compact specimens should yield data fully comparable to that from the larger specimens of the previous project. This presentation focuses on the design and fabrication of the long-term exposure specimens. The accelerated testing of the materials and evaluation of construction practices will be completed in 2013 and report submitted.

Language

• English

Project

• Status: Active
• Funding: $1170144.00
• Sponsor Organizations:

  Federal Highway Administration

  1200 New Jersey Avenue, SE
  Washington, DC  United States  20590
• Project Managers:

  Virmani, Paul

• Performing Organizations:

  University of Texas at Austin

  Austin, TX  United States  78712
• Start Date: 20030101
• Expected Completion Date: 0
• Actual Completion Date: 20131101
• Source Data: RiP Project 26821

Subject/Index Terms

• TRT Terms: Bridge members; Construction management; Corrosion; Corrosion protection; Materials tests; Posttensioning
• Uncontrolled Terms: Field exposure conditions
• Geographic Terms: Texas
• Subject Areas: Bridges and other structures; Construction; Economics; History; I30: Materials;

Filing Info

• Accession Number: 01461326
• Record Type: Research project
• Source Agency: Federal Highway Administration
• Files: RIP, USDOT
• Created Date: Jan 3 2013 1:43PM