Monitoring of Early Stage Prestress Change of Long Span Steam-Cured Concrete Box Girder with Pretension Method
In this study, the early-stage change of prestressing force was measured by using effective stress-meters and strain gauges, which was installed on a steam cured 50m-long span pretensioned box girder. During the steam-curing period, the total of 15% loss in prestressing force was measured. It was the temperature rise of concrete and a reaction system that induced such amount of prestressing force. Also, the global change of concrete stress was also checked during the fabrication of a box girder. The result showed that the sufficient compressive stress was introduced due to the special feature of steam curing.
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Corporate Authors:
Federal Highway Administration
1200 New Jersey Avenue, SE
Washington, DC United States 20590National Concrete Bridge Council
Portland Cement Association, 5420 Old Orchard Road
Skokie, IL United States 60077-1083Missouri Department of Transportation
105 West Capitol Avenue
Jefferson City, MO United States 65102American Concrete Institute (ACI)
38800 Country Club Drive
Farmington Hills, MI United States 48331 -
Authors:
- Choi, Kyu-Yong
- Song, Geun-Yong
- Kang, Dong-Ok
- Cha, Su-Won
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Conference:
- 2008 Concrete Bridge Conference
- Location: St. Louis MO, United States
- Date: 2008-5-4 to 2008-5-7
- Publication Date: 2008
Language
- English
Media Info
- Media Type: CD-ROM
- Features: Figures; Photos; Tables;
- Pagination: 8p
- Monograph Title: HPC: Safe, Affordable, and Efficient
Subject/Index Terms
- TRT Terms: Box girder bridges; Compressive strength; Concrete curing; Girder bridges; Long span bridges; Prestressed concrete; Prestressed concrete bridges; Steam curing; Stress gages
- Subject Areas: Bridges and other structures; Design; Highways; Materials; I24: Design of Bridges and Retaining Walls; I32: Concrete;
Filing Info
- Accession Number: 01105356
- Record Type: Publication
- Files: TRIS, USDOT, STATEDOT
- Created Date: Jul 30 2008 8:11AM