Comparative Study of Mechanical and Corrosion Resistance Properties of Bridge Post-Tensioning Strands
This report summarizes the exploration of new methods of protection for the strands used in post-tensioning of concrete bridges. Companion small-scale tests of strand or grout and strand were conducted. The tests included mechanical testing to determine modulus of elasticity, yield strength, and ultimate strength. In addition a number of passive corrosion exposure tests and accelerated active corrosion tests were run. These accelerated tests included both linear polarization resistance tests and potentiodynamic tests. Strand types investigated included conventional steel strand, hot dip galvanized strand, stainless steel strand, copper-clad strands, stainless-clad strands, and flow-filled epoxy-coated strand. The results indicated that the epoxy-coated strand dominated the others in corrosion resistance and met all mechanical property requirements. The stainless-clad and stainless steel strand were only slightly behind the epoxy-coated in corrosion resistance but need improvement in mechanical properties. The stainless-clad strand met the mechanical requirements for Grade 250 but not Grade 270.
- Record URL:
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Supplemental Notes:
- Project Title: Corrosion Resistance of Grouted Post-Tensioning Systems.
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Corporate Authors:
University of Texas, Austin
Center for Transportation Research, 1616 Guadalupe Street
Austin, TX United States 78701-1255Texas Department of Transportation
Research and Technology Implementation Office, P.O. Box 5080
Austin, TX United States 78763-5080Federal Highway Administration
1200 New Jersey Avenue, SE
Washington, DC United States 20590 -
Authors:
- Kalina, R D
- Lean, S Mac
- Breen, J E
- Publication Date: 2011-8-15
Language
- English
Media Info
- Media Type: Web
- Edition: Technical Report
- Features: Figures; Photos; References; Tables;
- Pagination: 74p
Subject/Index Terms
- TRT Terms: Accelerated tests; Concrete bridges; Copper; Corrosion resistance; Corrosion tests; Epoxy coatings; Galvanized metals; Mechanical tests; Posttensioning; Stainless steel; Steel; Tendons (Materials)
- Uncontrolled Terms: Linear polarization resistance
- Subject Areas: Bridges and other structures; Highways; Materials; I24: Design of Bridges and Retaining Walls; I34: Steels and Metals;
Filing Info
- Accession Number: 01376190
- Record Type: Publication
- Report/Paper Numbers: FHWA/TX-11/0-4562-3, Report 0-4562-3
- Contract Numbers: Project 0-4562
- Files: TRIS, USDOT, STATEDOT
- Created Date: Jul 24 2012 8:21AM