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SHRP 2 - R04 ABC Demonstration Bridge Design and Construction AASHTO Committee on Construction San Francisco, CA August 16, 2012

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Iowa ABC Demonstration Project Two Week Closure US Highway 6 Bridge over Keg Creek 6 miles east of Council Bluffs, IA Normal construction duration 14-16 weeks ABC construction duration 14 days

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Project Innovations Precast modular bridge system (including precast approach pavement) Superstructure units create a semi- integral abutment for rapid construction Durable, moment-resisting UHPC joint between deck panels First bridge in US with full, moment- resisting UHPC joint at the piers

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UHPC UHPC Particle Packing UHPC Constituents: Portland cement silica fume fine, uniformly graded sand crushed quartz steel fibers water superplasticizers

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14-Day ABC Timeline 123 4 56789 10 111213 14

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Bridge Farm Concept

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Precast Abutments and Piers

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Superstructure Modules

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Deck Joint Forming

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Deck Concrete Placement

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Drilled Shaft Construction

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Abutment Details Precast Abutment Construction Single piece barrel section SCC to fill pile pockets Temporary support of backwall until SCC reaches 3500 psi

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Semi- Integral Abutment

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Abutment Construction

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SCC Concrete for Abutments

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Precast Piers

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Precast Pier Connections

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Column Assembly and Bracing

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Capbeam Assembly

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Modular Superstructure

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Pier Joint Detail C Pier 1 L C Pier 2 L

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PT Retrofit for Modules

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Module Transport

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Module Assembly

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Deck Joint Reinforcing

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UHPC Mixing

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UHPC Placement

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FHWA/HFL Workshop

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SHRP 2 - R04 ABC Demonstration Bridge Design and Construction Questions?