The effectiveness of cement grout as corrosion protection system for post-tensioned concrete tendens has been under debate due to significant corrosion damage, several failures of individual tendens and few collapses of non-typical structures. After a comprehensive research program, developed at the Ferguson Structural Engineering Laboratory, the long term beam corrosion test series indicated negative durability effects due to the use of mixed reinforcement, galvanized steel ducts, and typical galvanized d uet splices. Cracks had a direct negative effect on specimen performance and grout voids were found to be detrimental to the durability of both galvanized ducts and strand. On the other hand, positive effects were found with the use of high performance concrete, high post-tensioning levels, and plastic ducts.
|Original language||English (US)|
|Title of host publication||Structural Concrete and Time - Proceedings of the fib Symposium|
|Editors||Angel A. Di Maio, Claudio J. Zega|
|Publisher||Symposium Secretariat, fib Symposium Argentina 2005|
|Number of pages||8|
|ISBN (Electronic)||9872166013, 9789872166014|
|State||Published - 2005|
|Event||2005 fib Symposium on Structural Concrete and Time - La Plata, Argentina|
Duration: Sep 28 2005 → Sep 30 2005
|Name||Structural Concrete and Time - Proceedings of the fib Symposium|
|Other||2005 fib Symposium on Structural Concrete and Time|
|Period||9/28/05 → 9/30/05|
Bibliographical noteFunding Information:
The authors gratefully acknowledge the financial support provided by the Texas Department of Transportation. Any opinions expressed in this paper are those of the authors, and not necessarily those of the sponsor.