EFFECT OF ELEVATED TEMPERATURE ON THE BOND STRENGTH OF EPOXY-COATED PRESTRESSING STRAND

This paper reports the results of an experimental investigation carried out to compare the effect of elevated temperatures (up to 200 deg F; 93 deg C) on the pull-out strength of epoxy-coated and uncoated strands embedded in concrete. The test results showed that for the epoxy-coated strands, there is a reduction in the bond strength which initiates at about 100 deg F (38 deg C) with about a 33% reduction at 160 deg F (71 deg C) and over 85% reduction at 200 deg F (93 deg C). It is recommended that detensioning of epoxy-coated strand should not be done at internal concrete temperatures greater than 160 deg F (71 deg C).

Language

  • English

Media Info

  • Features: Figures; References; Tables;
  • Pagination: p. 54-61
  • Serial:

Subject/Index Terms

Filing Info

  • Accession Number: 00726745
  • Record Type: Publication
  • Files: TRIS
  • Created Date: Oct 15 1996 12:00AM