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:
  • Girders
  • High performance concrete
  • Prestressed concrete bridges
  • 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."
  More +
• Format:
  PDF
• Funding:
  P310
• Download URL:
  https://rosap.ntl.bts.gov/view/dot/25282/dot_25282_DS1.pdf
• File Type:
  [PDF - 2.07 MB]
• Collection(s):
  US Transportation Collection
• Main Document Checksum:
  urn:sha-512:5b5a053d8b2b1a65bdfee7fb85daccecd4dd66b60e91cca90f32c4f2fc9bb073e92050a32527f795f986d4dcc0f094a3a9b39f125a6a468a07025528cde1b0a5