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TURNER-FAIRBANK HIGHWAY RESEARCH CENTER
Ben Graybeal, Ph.D., P.E. Structural Concrete Research Program Mgr.
Federal Highway Administration 202-493-3122
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TURNER-FAIRBANK HIGHWAY RESEARCH CENTER
• Benefits: – Reduced construction on critical path – Increased safety – Increased quality
• Challenges: – Transportation and Assembly – Connections
Significant Hurdle
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TURNER-FAIRBANK HIGHWAY RESEARCH CENTER
• Simplify Fabrication of Precast Components
• Simplify Field Construction Operations
• Create Robust Connections
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TURNER-FAIRBANK HIGHWAY RESEARCH CENTER
6” (152 mm)
6” (152 mm)
5.9” (150 mm) LAP
8” (2
03 m
m)
5.9”
(150
mm
) 1”
(2
5 m
m)
1.5” (38 mm)
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TURNER-FAIRBANK HIGHWAY RESEARCH CENTER
Traditional Studs Shortened Studs
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TURNER-FAIRBANK HIGHWAY RESEARCH CENTER Extended Stirrup Connection
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TURNER-FAIRBANK HIGHWAY RESEARCH CENTER
• Advanced cementitious composite material • High strength, high stiffness • Exceptional durability • Internal steel fiber reinforcement for added ductility • Self-consolidating
UHPC, UHPFRC, RPC Ductal, CoreTUFF, BSI, Densit, Cemtec, …
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TURNER-FAIRBANK HIGHWAY RESEARCH CENTER
• Compressive Strength – 18 to 25 ksi • Modulus of Elasticity – 6200 to 7200 ksi • Creep Coefficient – 0.5 to 0.8 • Sustained Tensile Capacity – 0.9 to 1.3 ksi • Rapid Chloride Permeability – 200 to 360 Coulombs • Freeze/Thaw Resistance – RDM > 95%
Source: FHWA Report FHWA-HRT-06-103 Material Property Characterization of Ultra-High Performance Concrete
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TURNER-FAIRBANK HIGHWAY RESEARCH CENTER
• NHI Webinars – November 18, 2010 and April 21, 2011 http://fhwa.adobeconnect.com/n134083201011 http://fhwa.adobeconnect.com/n134083201104
• TechNote: UHPC – FHWA HRT-11-038 – Aimed at DOTs and practitioners – General information on casting,
curing, testing, applications, inspection, etc.
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TURNER-FAIRBANK HIGHWAY RESEARCH CENTER
• NHI Webinars – November 18, 2010 and April 21, 2011 http://fhwa.adobeconnect.com/n134083201011 http://fhwa.adobeconnect.com/n134083201104
• TechNote: UHPC – FHWA HRT-11-038 – Aimed at DOTs and practitioners – General information on casting,
curing, testing, applications, inspection, etc.
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TURNER-FAIRBANK HIGHWAY RESEARCH CENTER
SR 23 over Otego Creek Oneonta, New York
6 in.
Closure Pour (UHPC) Precast Deck Panel 8 in.
96 in.
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TURNER-FAIRBANK HIGHWAY RESEARCH CENTER
SR 31 over Canandaigua Outlet Lyons, New York
61 in. 6 in.
Closure Pour (UHPC) Deck Bulb Tee Prestressed Girder
41 in.
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TURNER-FAIRBANK HIGHWAY RESEARCH CENTER
Highway 17 Bridge over Eagle River In Western Ontario, Canada
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TURNER-FAIRBANK HIGHWAY RESEARCH CENTER
U.S. 6 over Keg Creek Pottawattamie County, Iowa
SHRP2 R04 Demonstration Project Construction Scheduled for October 2011
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TURNER-FAIRBANK HIGHWAY RESEARCH CENTER