Design of ultra high performance concrete as an overlay in pavements and bridge decks.

Details

• Creators:
  Khayat, Kamal H. ; Valipour, Mahdi
• Corporate Creators:
  Missouri University of Science and Technology. Center for Transportation Infrastructure and Safety
• Corporate Contributors:
  United States. Department of Transportation. Research and Innovative Technology Administration
• Subject/TRT Terms:
  • Bridge decks
  • Overlays (Pavements)
  • Ultra high performance concrete
  • Fiber reinforced concrete
  • Mix design
  • Fly ash
  • Granulated slag
  • Silica fume
  • Bond strength (Materials)
  • Flexural strength
  More +
• Publication/ Report Number:
  NUTC R321;Project #00040520
• Resource Type:
  Tech Report
• Geographical Coverage:
  Missouri
• Corporate Publisher:
  Missouri University of Science and Technology. Center for Transportation Infrastructure and Safety
• Abstract:
  The main objective of this research was to develop ultra-high performance concrete (UHPC) as a reliable, economic, low carbon foot ; print and durable concrete overlay material that can offer shorter traffic closures due to faster construction. The UHPC was optimized ; using supplementary cementitious materials (SCMs), proper combinations of aggregates, and adequate selection of fiber types and ; contents. Three types of SCMs, including silica fume, Class C and F fly ash, and ground granulated blast-furnace slag (GGBS) were ; used to optimize cement paste with high packing density. The optimized pastes were then used to produce UHPC materials with ; various contents of fine aggregates and fibers to prove the feasibility of using the UHPC for bonded overlay. The optimized materials ; were evaluated for workability, rheology, mechanical properties, and shrinkage, as well as their performance was compared to the ; reference UHPC. In addition, the robustness of the optimized UHPC mixtures to variations of the mixing and curing temperatures was ; also examined. Bond behavior and the effect of overlay thickness of the developed UHPC materials were also investigated in this ; study. ; The experimental study reported herein proved that the optimized UHPC mixtures can develop comparable performance to the ; commercially available UHPC proportioned with 100% silica sand and 25% silica fume replacement, which was used as the reference ; UHPC. Given the mix design of the reference UHPC, the UHPC mixtures developed in this study could be more environmental ; friendly and cost-effective overlay materials compared to the reference UHPC. It is important to note that the optimized UHPC ; materials can develop adequate mechanical properties without any accelerated curing or special treatment, which contributes to a ; reduction of overall construction cost of the overlay. The developed UHPC mixtures had equal to or lower drying shrinkage than the ; reference UHPC. ; The bond strength between the substrate concrete and the UHPC overlay was shown to be greater than that of the substrate concrete, ; and the use of the UHPC overlay led to significant increase in flexural strength and toughness over the monolithic beam cast with ; conventional concrete, regardless of the overlay thickness. These results indicate the feasibility of using the UHPC as a bonded ; overlay.
  More +
• Format:
  PDF
• Funding:
  DTRT06-G-0014
• Download URL:
  https://rosap.ntl.bts.gov/view/dot/27955/dot_27955_DS1.pdf
• File Type:
  [PDF - 4.65 MB]
• Collection(s):
  University Transportation Centers ; US Transportation Collection
• Main Document Checksum:
  urn:sha-512:cd28de56b00372f63c73ac678d5b357f2eeba5c261306485adbfb9e7647666078602a872cf616cac9be3b916ec837626313db2740a2852c8f9bbf80ec6ecdf4f