Title:
Durability of Post-Tensioned Concrete Structures
Author(s):
Clifford L. Freyermuth
Publication:
Concrete International
Volume:
13
Issue:
10
Appears on pages(s):
58-65
Keywords:
bridges (structures); durability; post-tensioning; research; prestressed concrete; prestressing steels; General
DOI:
Date:
10/1/1991
Abstract:
In general, durability performance of post-tensioned concrete bridges in the U.S. has been excellent to date, and recent improvements in corrosion protection materials for tendons and stay cables are expected to provide long-term durability in future bridges. Known, documented tendon failures caused by corrosion have been largely restricted to parking structures--which comprise about 40 percent of unbonded post-tensioned construction--in corrosive environments; however, serious durability problems have been experienced by parking structures of all structural types. Such deterioration can be avoided in post-tensioned concrete parking structures in aggressive environments with careful implementation of Post-Tensioning Institute procedures with a relatively small increase in costs.