AN INVESTIGATION OF THE SUSCEPTIBILITY OF POST-TENSIONING CABLES TO STRESS-CORROSION CRACKING

Post-tensioning cables having ultimate tensile strength (UTS) of 270 ksi (1862 MPa) and satisfying ASTM Standard A-416 were stressed to 80 to 95 percent UTS and exposed to 3.5 percent sodium chloride and saturated calcium hydroxide solutions, where pH values ranged from 8 to 12.5. After 900 hours, since no failures were experienced, cables were forced to rupture. No appreciable reduction in strength resulted, except in cables that were artificially notched (strength losses were not due to corrosion). However, rapid failure at 95 percent UTS occurred when cables were immersed in a dilute hydrochloric acid solution where pH values ranged from 1 to 2. Time-to-failure at pH 2 averaged about 100 hours, whereas at pH 1 time-to-failure was about 1 hour. /Author/

  • Corporate Authors:

    Army Construction Engineering Research Laboratory

    P.O. Box 4005
    Champaign, IL  United States  61820
  • Authors:
    • Hahin, C
    • Gambill, J
    • Scott, J K
  • Publication Date: 1977-1

Media Info

  • Features: Figures; Tables;
  • Pagination: 11 p.

Subject/Index Terms

Filing Info

  • Accession Number: 00151951
  • Record Type: Publication
  • Report/Paper Numbers: CERL-TR-M-199 Final Rpt.
  • Files: TRIS
  • Created Date: Jun 22 1977 12:00AM