Application of ultra-high performance concrete to bridge girders.
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Application of ultra-high performance concrete to bridge girders.

Filetype[PDF-2.07 MB]


English
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Details:

  • Creators:
  • Corporate Creators:
    University of Nebraska--Lincoln. Dept. of Civil Engineering
  • Corporate Contributors:
    Nebraska. Dept. of Roads. Bridge Division
  • Subject/TRT Terms:
  • Publication/ Report Number:
  • Resource Type:
    Tech Report
  • Geographical Coverage:
    Nebraska
  • Corporate Publisher:
    Nebraska Transportation Center
  • Abstract:
    "Ultra-High Performance Concrete (UHPC) is a new class of concrete that has superior performance characteristics

    compared to conventional concrete. The enhanced strength and durability properties of UHPC are mainly due to optimized

    particle gradation that produces a very tightly packed mix, extremely low water to powder ratio, and use of steel fibers. The

    unique strength and durability properties of UHPC make it an attractive material for precast prestressed bridge girder

    construction. However, commercial UHPC mixes currently available in the US market cost about 10 times the cost of

    conventional concrete mixes, in addition to the need for special mixing and curing procedures that are not convenient to

    most precasters. The general objective of this project is to promote the use of UHPC in bridge construction. The specific

    objectives include: 1) review the various UHPC mixes developed in North America, Europe, and Japan and compare them

    in terms of economics and performance characteristics; 2) develop non-proprietary UHPC mix that are optimized in terms

    of the total cost of production while providing a final compressive strength of at least 18 ksi; 3) evaluate the mechanical

    properties of the developed mixes; and 4) investigate the application of the developed mixes to standard precast prestressed

    concrete bridge I-girders. The developed mixes consist of type III cement, fine sand, class C fly ash, silica fume, high

    range water reducer, and water. Steel fibers are eliminated due to their high cost and Grade 80 ksi welded wire

    reinforcement (WWR) is used instead to substitute for the loss in the tensile/shear capacity. The results of the laboratory

    tests and the full-scale girder tests indicated that the developed mixes are attainable using practical and affordable mixing

    and curing procedures and their mechanical properties are superior to those of the mixes currently used in Nebraska."

  • Format:
    PDF
  • Funding:
    P310
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