A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Corrosion Protection for Bonded Internal Tendons in Precast Segmental Construction
This report documents a series of accelerated corrosion tests on small-sized specimens typical of bonded internal post-tensioning tendons in segmentally constructed box girder concrete bridges. Thirty-eight macrocell specimens were subjected to a highly aggressive exposure and observed for four and one-half years. At that time, nineteen of the specimens were opened for detailed examination and all corrosion behavior recorded. The variables included were joint type (dry or epoxy), duct type (galvanized steel or plastic), grout type (3 grouts with differing additives) and level of joint compression (3 different levels). Half-cell potentials and macrocell corrosion currents were measured throughout exposure. While some substantial corrosion was found in dry joint specimens, the corrosion resistance of epoxy joint specimens was excellent.
Corrosion Protection for Bonded Internal Tendons in Precast Segmental Construction
This report documents a series of accelerated corrosion tests on small-sized specimens typical of bonded internal post-tensioning tendons in segmentally constructed box girder concrete bridges. Thirty-eight macrocell specimens were subjected to a highly aggressive exposure and observed for four and one-half years. At that time, nineteen of the specimens were opened for detailed examination and all corrosion behavior recorded. The variables included were joint type (dry or epoxy), duct type (galvanized steel or plastic), grout type (3 grouts with differing additives) and level of joint compression (3 different levels). Half-cell potentials and macrocell corrosion currents were measured throughout exposure. While some substantial corrosion was found in dry joint specimens, the corrosion resistance of epoxy joint specimens was excellent.
Corrosion Protection for Bonded Internal Tendons in Precast Segmental Construction
J. S. West (author) / R. P. Vignos (author) / J. E. Breen (author) / M. E. Kreger (author)
1999
96 pages
Report
No indication
English
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