Making a Transition to the LRFD Bridge Specifications

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SCC at Auburn University
SCC in Drilled Shafts
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Current Limitations

• Test Standards
• Limited experience
• Cost implications
• Structural design specifications
• Construction specifications

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Guidelines and Specifications

• PCI Interim Guidelines for Self-Consolidating
  Concrete
• ACI Committee 237 Self-Consolidating Concrete
  Emerging Technology Series
• ACI Committee 211 Proportioning SCC
• ASTM Test Methods Slump Flow, Column
  Segregation, J-Ring

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DOT Acceptance of SCC

• Alabama
• California
• Colorado
• Delaware
• Florida
• Hawaii
• Illinois
• Iowa
• Kansas
• Maine
• Maryland

• Minnesota
• Nebraska
• Nevada
• New Hampshire
• New Jersey
• New York
• Ohio
• Oregon
• Pennsylvania
• South Carolina

• Tennessee
• Texas
• Washington
• Utah
• Virginia

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Innovative Bridge Research and Construction (IBRC)

• Colorado Nebraska
• Hawaii New Hampshire
• Kansas South Carolina
• Michigan Virginia

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NCHRP Study

• NCHRP Project 18-12 SCC for PC, PS Concrete
  Bridge Elements
• Deliverables
• Develop properties and performance criteria
• Provide mix design recommendations
• Recommend Test Methods
• Fresh and Hardened Properties
• Durability characteristics
• Structural Design and Construction Specifications

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Performance Specifications

• Workability
• Slump flow gt 24
• Remain flowable ? 90 minutes
• Withstand a slope of 3
• Pumpable ? 90 minutes through pipes ? 100 Yds long

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Performance Specifications

• Mechanical Properties
• 28 day comp. Strength Similar to HPC
• Creep and Shrinkage Similar to HPC
• Durability
• Freeze-thaw resistance ? HPC
• www.fhwa.dot.gov/bridge

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Closing Remark

• Design SCC to meet project needs
• Work and Experiment together
• Designer
• Specification Writer
• Materials Engineer
• Contractor
• Subcontractor/Supplier
• SCC has major technical and economic
  advantages

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Can we afford not to considerSCC?
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Good HPC But poor consolidation!
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Good HPC, But poor consolidation!
SCC would have cost too much?
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Drilled shafts with congested reinforcement
High slump concrete would not do it.
SCC will work!
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Think SCC in your next project!

• Intricate and complex forms
• Congested reinforcement
• Architectural surfaces
• Precast/Prefabricated elements
• Quality and high productivity

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Experience the excitement ofSelf-Consolidating
Concrete!