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Recent Innovations for Enhancing Durability of Post-Tensioning Systems in the USA

 Recent Innovations for Enhancing Durability of Post-Tensioning Systems in the USA
Author(s):
Presented at 17th IABSE Congress: Creating and Renewing Urban Structures – Tall Buildings, Bridges and Infrastructure, Chicago, USA, 17-19 September 2008, published in , pp. 556-557
DOI: 10.2749/222137908796293811
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After more then 50 years of post-tensioned bridge construction, several recent failures in the UK and Florida alerted both government agencies and the construction industry to improve the design, f...
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Bibliographic Details

Author(s):
Medium: conference paper
Language(s): English
Conference: 17th IABSE Congress: Creating and Renewing Urban Structures – Tall Buildings, Bridges and Infrastructure, Chicago, USA, 17-19 September 2008
Published in:
Page(s): 556-557 Total no. of pages: 9
Page(s): 556-557
Total no. of pages: 9
Year: 2008
DOI: 10.2749/222137908796293811
Abstract:

After more then 50 years of post-tensioned bridge construction, several recent failures in the UK and Florida alerted both government agencies and the construction industry to improve the design, fabrication, installation and testing of post-tensioning tendons. The largest supplier of post-tensioning materials in the USA, Dywidag Systems International (DSI), redesigned its hardware and revised installation procedures to protect tendons for years to come. Improved grout mixtures were developed using new methods intended to minimize voids and ensure adequate corrosion protection.