Ultra-high performance concrete for Michigan bridges, material performance : phase I.

Details

• Creators:
  Ahlborn, Theresa M. ; Peuse, Erron J. ; Misson, Donald Li
• Corporate Creators:
  Michigan Technological University. Department of Civil and Environmental Engineering
• Corporate Contributors:
  Michigan. Dept. of Transportation. Construction and Technology Division
• Subject/TRT Terms:
  • High strength concrete
  • Concrete bridges
  • Bridge design
  • Bridge construction
  • Testing
  • Structural analysis
  • High strength concrete--Testing
  • Concrete bridges--Design and construction
  • Structural analysis (Engineering)
• Publication/ Report Number:
  RC-1525
• Resource Type:
  Tech Report
• Geographical Coverage:
  Michigan
• Edition:
  Final report.
• Corporate Publisher:
  Michigan. Department of Transportation
• Abstract:
  One of the latest advancements in concrete technology is Ultra-High Performance Concrete (UHPC). UHPC is ; defined as concretes attaining compressive strengths exceeding 25 ksi (175 MPa). It is a fiber-reinforced, denselypacked ; concrete material which exhibits increased mechanical performance and superior durability to normal and ; high strength concretes. UHPC has great potential to be used in the bridge market in the United States. However, to ; gain acceptance by designers, contractors, and owners this material needs to be tested according to American ; Society for Testing and Materials (ASTM) International and American Association of State Highway Transportation ; Officials (AASHTO) standards, and new practices must be developed. ; The focus of this research was to investigate how the age at which UHPC undergoes a steam (thermal) treatment ; affects some mechanical and durability properties. Four mechanical properties (compressive strength, modulus of ; elasticity, Poisson’s ratio, and flexural characteristics) and properties related to durability (chloride ion penetration ; resistance, freeze-thaw durability, and coefficient of thermal expansion) were investigated. The testing was ; conducted with differing curing conditions and at different ages to examine how these factors influence each of the ; measured properties. Specimens, independent of age at thermal treatment, yielded compressive strengths of over 30 ; ksi, modulus of elasticity values in excess of 8000 ksi, and a Poisson’s ratio of 0.21. Flexural characteristics were ; dependent on curing regime. Testing consistently validated that UHPC had negligible chloride ion penetration, a ; high resistance to freeze-thaw cycling (durability factor of 100), and coefficient of thermal expansion values similar ; to that of normal strength concretes for both ambient cured and thermally treated specimens. Additional results ; revealed UHPC’s autogenous healing properties while undergoing freeze-thaw cycling, low variability between ; batches, and the reproducibility of results between different U.S. laboratories. ; Lastly, recommendations were developed for future testing of UHPC durability properties and a preliminary lifecycle ; cost comparison showed that the low life-maintenance costs of UHPC can offset higher initial costs, especially ; as the use of UHPC in the U.S. increases and the initial cost of the material decreases.
  More +
• Format:
  PDF
• Funding:
  2003-0063
• Download URL:
  https://rosap.ntl.bts.gov/view/dot/18193/dot_18193_DS1.pdf
• File Type:
  [PDF - 6.96 MB]
• Collection(s):
  US Transportation Collection
• Main Document Checksum:
  urn:sha256:32e26606d97a33cd02a4b91bc26c4681946721eb7bce3d22fda6c148e4264883