Title:
Studies of the Bissell Bridge Post-Tensioning Tendons After 35 Years
Author(s):
Morris Schupack
Publication:
Concrete International
Volume:
16
Issue:
3
Appears on pages(s):
50-54
Keywords:
bridges (structures); corrosion resistance; demolition; grout; post-tensioning; prestressing steels; superstructures; Structural Research
DOI:
Date:
3/1/1994
Abstract:
The demolition of the post-tensioned superstructure of the 35-year-old, 14 to 120 ft (36.6 m) span Bissell Bridge provided the opportunity to evaluate the performance of the grouted wire tendons. Tendons grouted with a portland cement grout, without added chlorides, performed well and were generally free of corrosion if the sheaths were mostly grout filled. Tendons grouted with chloride-laden grout suffered severe wire and sheath corrosion with numerous wire failures. Tendons that were never grouted or contained large grout voids showed no corrosion to severe corrosion.