Optimizing concrete mix designs to produce cost effective paving mixes.

Details

• Creators:
  Ramseyer, Chris C. ; Kiamanesh, Roozbeh
• Corporate Creators:
  University of Oklahoma. School of Civil Engineering and Environmental Science
• Corporate Contributors:
  Oklahoma. Dept. of Transportation. Planning & Research Division ; United States. Federal Highway Administration
• Subject/TRT Terms:
  • Fly ash
  • Concrete
  • Paving materials
  • Pozzolanic action
  • Reactions in concrete
  • Portland cement concrete
  • Activation (Chemistry)
  • Fly ash
  • Concrete
  • Mechanical activation
  More +
• Publication/ Report Number:
  FHWA-OK-08-11
• Resource Type:
  Tech Report
• Geographical Coverage:
  Oklahoma
• Edition:
  Final report; Oct. 2007-Oct. 2008.
• Corporate Publisher:
  Oklahoma. Dept of Transportation
• Abstract:
  This research is designed to determine the effect of the mechanically activated fly ash on fresh ; concrete properties and the ultimate strength of the hardened concrete. Six types of fly ash that are ; locally available in the state of Oklahoma were used in this research. The activation of the fly ash was ; performed with a modified ball mill to increase the hydration reaction rate of the fly ash particles. ; Two primary variables were studied in this research; Grinding duration and the percentage of fly ash ; as a portion of cementitious material. ; The fly ash was ground for 30 and 120 minutes. The ground fly ash was used as a cementitious ; material in the concrete in various proportions; 20, 40, and 60% of the weight. The strength of each ; mix was compared with plain Portland cement concrete and the concrete samples with un-ground fly ; ash to determine any changes. ; The results of this study show that the concrete with higher proportions of fly ash has higher ; workability, although the strength of the samples decreases in most cases if high volume of fly ash is ; used. However, the results indicate that grinding the fly ash can mechanically active the particles and ; not only improve the strength of the samples with high proportions of fly ash, but also increase the ; strength higher than traditional Portland cement concrete.
  More +
• Format:
  PDF
• Funding:
  ODOT Item Number 2199
• Download URL:
  https://rosap.ntl.bts.gov/view/dot/24278/dot_24278_DS1.pdf
• File Type:
  [PDF - 5.15 MB]
• Collection(s):
  US Transportation Collection
• Main Document Checksum:
  urn:sha-512:63c6008dd490e53d57665763c7c171fe50ef5ded9489a5b7ade72e331c0734998f9dee59c0d1ea28c6b03f9304a1e6cd08c9f806d604b9de92383f305529ffb5