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:
  Bridge Construction Bridge Design Concrete Bridges Concrete Bridges--Design And Construction High Strength Concrete High Strength Concrete--Testing Structural Analysis Structural Analysis (Engineering) Testing
• 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.
  
  
• Format:
  PDF
• Funding:
  2003-0063
• Collection(s):
  US Transportation Collection
• Main Document Checksum:
  urn:sha256:32e26606d97a33cd02a4b91bc26c4681946721eb7bce3d22fda6c148e4264883
• Download URL:
  https://rosap.ntl.bts.gov/view/dot/18193/dot_18193_DS1.pdf
• File Type:
  [PDF - 6.96 MB ]