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Use of innovative concrete mixes for improved constructability and sustainability of bridge decks.

File Language:
English


Details

  • Creators:
    Shrestha, Pankaj Narayan ; Harley, Amber ; Pendergrass, Benjamin ; Darwin, David ; Browning, JoAnn
  • Corporate Creators:
    University of Kansas. Dept. of Civil, Environmental and Architectural Engineering
  • Subject/TRT Terms:
  • Publication/ Report Number:
    K-TRAN: KU-11-8
  • Resource Type:
    Tech Report
  • Geographical Coverage:
    Kansas
  • Corporate Publisher:
    Kansas. Dept. of Transportation
  • Abstract:
    Bridge deck crack surveys were performed on twelve bridges on US-59 south of Lawrence, Kansas, to determine the effects of ; mixture proportions, concrete properties, deck type, and girder type on the crack density of reinforced concrete bridge decks. Of ; the twelve decks surveyed, eight are supported by prestressed concrete girders and four are supported by steel girders. Four of the ; decks supported by prestressed girders are cast on partial-depth precast deck panels, two are monolithic with synthetic fibers, and ; two have overlays. Of the four decks supported by steel girders, two have silica fume overlays (SFO) and two are monolithic. One ; of two decks with a silica fume overlay contains synthetic fibers in the overlay. Following the surveys, crack maps were plotted ; and analyzed and cracking trends were observed. The results for the US-59 bridge decks are compared with crack densities ; obtained in a study of low-cracking high-performance concrete (LC-HPC) bridge decks. ; The monolithic concrete bridge decks supported by prestressed concrete girders within this study exhibit less cracking than ; decks supported by steel girders. At an age of approximately three and a half years, the US-59 monolithic decks supported by ; prestressed girders with deck panels are not displaying significant cracking; most of the cracks are short transverse cracks aligned ; with the joints between the deck panels. The US-59 decks supported by prestressed girders with overlays exhibit significantly more ; cracking than the decks on prestressed girders without overlays. Bridge decks supported by steel girders without overlays have ; slightly higher crack densities than the decks with overlays. No benefits of using fibers in either the overlay or deck have been ; observed in this study, the sample size, however, is small. An increase in crack density was observed with an increase in average ; concrete slump for decks supported by both prestressed and steel girders. Decks with deck panels supported by prestressed girders ; exhibited an increased crack density with an increase in paste content.
  • Format:
    PDF
  • Funding:
    C1872
  • Download URL:
    https://rosap.ntl.bts.gov/view/dot/26715/dot_26715_DS1.pdf
  • File Type:
    Filetype[PDF - 6.08 MB]
  • Collection(s):
    US Transportation Collection
  • Main Document Checksum:
    urn:sha256:2b04a625bee990e7f322fb3971f7825baadb6dece52b5736558e1ff6c9ef9081
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