Influence of fly ash, slag cement and specimen curing on shrinkage of bridge deck concrete.

Details

• Creators:
  Varner, Robert L.
• Corporate Creators:
  Burns Cooley Dennis, Inc.
• Corporate Contributors:
  United States. Federal Highway Administration
• Subject/TRT Terms:
  Bridge Decks Concrete Bridges Concrete Curing Cracking Fly Ash Shrinkage Slag Cement
• Publication/ Report Number:
  FHWA/MS-DOT-RD-14-247
• Resource Type:
  Tech Report
• Geographical Coverage:
  Mississippi
• Corporate Publisher:
  Mississippi. Dept. of Transportation
• Abstract:
  Cracks occur in bridge decks due to restrained shrinkage of concrete materials. Concrete materials shrink as
  
  cementitious materials hydrate and as water that is not chemically bonded to cementitious materials
  
  migrates from the high humid environment of the concrete to an environment with lower humidity.
  
  Reinforcing steel and structural supporting members provide restraint to this shrinkage which causes tensile
  
  stress in the concrete. When these tensile stresses exceed the tensile strength of the concrete, cracks occur
  
  and provide relief for these stresses. MDOT engineers wanted to determine the usefulness of supplementary
  
  cementitious to reduce shrinkage of concrete materials and subsequent cracking. This research project
  
  investigates length change of concrete as influenced by supplementary cementitious materials including
  
  Class C fly ash, Class F fly ash, and slag cement. The use of liquid membrane and 7-day, 14-day, and 28-
  
  day moist curing periods were also investigated to determine the influence of curing on length change of
  
  standard prism specimens.
  
  
• Format:
  PDF
• Funding:
  Project No. 106266 167000
• Collection(s):
  US Transportation Collection
• Main Document Checksum:
  urn:sha256:1e1676bcf6027cfc5bb50f0f7d106dbc8085650d496c7ae80c6b728dec636401
• Download URL:
  https://rosap.ntl.bts.gov/view/dot/29389/dot_29389_DS1.pdf
• File Type:
  [PDF - 2.93 MB ]