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:
  • Fly ash
  • Slag cement
  • Concrete curing
  • Concrete bridges
  • Bridge decks
  • Shrinkage
  • Cracking
• 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.
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• Format:
  PDF
• Funding:
  Project No. 106266 167000
• Download URL:
  https://rosap.ntl.bts.gov/view/dot/29389/dot_29389_DS1.pdf
• File Type:
  [PDF - 2.93 MB]
• Collection(s):
  US Transportation Collection
• Main Document Checksum:
  urn:sha256:1e1676bcf6027cfc5bb50f0f7d106dbc8085650d496c7ae80c6b728dec636401