Comparison of conventional and internally cured concrete bridge decks in Utah : Mountain View corridor project.

Details

• Creators:
  Guthrie, W. Spencer ; Yaede, Joseph M. ; Bitnoff, Amanda C.
• Corporate Creators:
  Brigham Young University. Dept. of Civil and Environmental Engineering
• Corporate Contributors:
  United States. Federal Highway Administration
• Subject/TRT Terms:
  • Concrete curing
  • Concrete bridges
  • Bridge decks
  • Fine aggregates
  • Moisture content
  • Cracking
  • Compressive strength
  • Permeability
  • Modulus of elasticity
  • Field tests
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• Publication/ Report Number:
  UT-15.02
• Resource Type:
  Tech Report
• Geographical Coverage:
  Utah
• Corporate Publisher:
  Utah. Dept. of Transportation
• Abstract:
  The objectives of this research were to 1) monitor in-situ moisture and diffusivity for both conventional concrete ; and concrete containing pre-wetted lightweight fine aggregate (LWFA), 2) compare deck performance in terms of ; early-age cracking, compressive strength, and chloride ingress, and 3) compare concrete properties in terms of ; compressive strength, chloride permeability, elastic modulus, and water content in the laboratory using cylinders ; cast in the field at the time of deck construction. The research involved field and laboratory evaluations of four ; newly constructed bridge decks located in northern Utah, two constructed using conventional concrete and two ; constructed using pre-wetted LWFA to promote internal curing. Data from sensors embedded in the concrete decks ; indicate that the volumetric moisture content and electrical conductivity of the internally cured concrete were higher ; than those of the conventional concrete during the 2-year monitoring period. Laboratory data indicate that the ; internally cured concrete was weaker at 1 year following deck construction, passed less current in rapid chloride ; permeability testing, had a lower modulus in free-free resonant testing, and had a higher gravimetric moisture ; content than the conventional concrete. In the field, the internally cured concrete was weaker at 2 years in Schmidt ; rebound hammer testing and exhibited greater chloride concentrations at both 1 and 2 years than the conventional ; concrete. The conventional concrete bridge decks had more reflection cracking from the joints between the ; underlying pre-cast half-deck panels than the internally cured concrete decks.
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• Format:
  PDF
• Funding:
  2513570
• Download URL:
  https://rosap.ntl.bts.gov/view/dot/28762/dot_28762_DS1.pdf
• File Type:
  [PDF - 18.12 MB]
• Collection(s):
  US Transportation Collection
• Main Document Checksum:
  urn:sha256:80164d005445fb7f11f314c250a4cd7d50ca6608802041807239caa20aedc710