OBSERVATIONS AND TESTING OF POST-TENSIONED BEAMS EXPOSED TO SEVERE WEATHERING FOR 33 YEARS

To determine the most effective end-anchorage protection for post-tensioned beams, twenty air-entrained post-tensioned concrete beams were fabricated and placed at the Treat Island severe-exposure station in 1961. The beams were fabricated using four types of post-tensioning systems with twelve different types of end-anchorage protection over external and recessed anchorages. End-anchorage protection was applied to the beams using six different types of joint preparation: bush-hammering, epoxy adhesive on sandblasted concrete surface, retarding agent, sandblasted, sandblasted with primer, and no preparation. End protections were made from three different mixtures: portland-cement concrete, epoxy concrete, and sand-cement mortar. The twenty post-tensioned test beams have been inspected annually by the Corps and biennially by other interests. The main findings are that the flush (recessed) anchorage protection using portland-cement concrete is the superior detail.

• Corporate Authors:

  American Concrete Institute (ACI)

  38800 Country Club Drive
  Farmington Hills, MI  United States  48331
• Authors:
  • Schupack, M
  • O'Neil, E F
• Conference:
  • Proceedings, Third CANMET/ACI International Conference on Performance of Concrete in a Marine Environment
  • Location: St. Andrews by-the-Sea, New Brunswick, Canada
  • Date: 1996-8-4 to 1996-8-9
• Publication Date: 1996

Language

• English

Media Info

• Pagination: p. 383-407

Subject/Index Terms

• TRT Terms: Air entrained concrete; Anchorages; Beams; Concrete; Concrete tests; Posttensioning; Reinforcing steel; Weathering
• Uncontrolled Terms: Concrete beams
• Subject Areas: Highways; Materials; I32: Concrete;

Filing Info

• Accession Number: 00728886
• Record Type: Publication
• Report/Paper Numbers: SP-163
• Files: TRIS
• Created Date: Nov 5 1996 12:00AM