Application of ultra-high performance concrete to bridge girders.

Details

• Creators:
  Tadros, Maher K. ; Morcous, George
• Corporate Creators:
  University of Nebraska--Lincoln. Dept. of Civil Engineering
• Corporate Contributors:
  Nebraska. Dept. of Roads. Bridge Division
• Subject/TRT Terms:
  Concrete Bridges Girders High Performance Concrete Prestressed Concrete Bridges
• Publication/ Report Number:
  SPR-P1(08)P310 ; 26-1120-0037-001
• 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
• Collection(s):
  US Transportation Collection
• Main Document Checksum:
  urn:sha256:57ad3656e751da664ac5594aa48ecc7ab2bdb524619753a92ff882739d79b29e
• Download URL:
  https://rosap.ntl.bts.gov/view/dot/25282/dot_25282_DS1.pdf
• File Type:
  [PDF - 2.07 MB ]