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- W643203054 abstract "The increased popularity of post-tensioned bridge construction in the United States has led to concerns about corrosion and its impact on the life cycle of these bridges. New materials have been produced by commercial manufacturers and are being used in post-tensioning systems. New construction methods have also been developed and include procedures recommended by the Post-Tensioning Institute (PTI). One major problem that agencies face today is the difficulty of providing sufficient monitoring and inspection techniques for bonded post-tensioned structures. Condition surveys are often limited to visual inspections for signs of cracking, spalling, and surface rust staining. This limited technique can often overlook the deterioration of prestressing steel and can fail to detect the potential for very severe and sudden collapses. Using the recommendations from previous Center for Transportation Research (CTR) research, the research team designed and developed new specimens. To establish the corrosion resistance of the post-tensioning strands to be used in the new specimens, the researchers performed preliminary companion tests. These strands were then used in combinations with different duct, coupler, and anchorage types and were subjected to highly aggressive exposure for either 4 or 6 years. The specimens were monitored continuously and eventually autopsied to evaluate the final corrosion resistance of each strand, duct, coupler, and anchorage combination." @default.
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- W643203054 date "2014-01-01" @default.
- W643203054 modified "2023-09-27" @default.
- W643203054 title "Corrosion Resistance of Grouted Post-Tensioning Systems" @default.
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