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Evaluating the time-dependent and bond characteristics of lightweight concrete mixes for Kansas prestressed concrete bridges.

File Language:
English


Details

  • Creators:
    Holste, Joseph R. ; Peterman, Robert J. ; Esmaeily, Asad
  • Corporate Creators:
    Kansas State University. Dept of Civil Engineering
  • Corporate Contributors:
    Kansas. Dept. of Transportation. Bureau of Materials & Research
  • Subject/TRT Terms:
  • Publication/ Report Number:
    K-TRAN: KSU-08-2
  • Resource Type:
    Tech Report
  • Geographical Coverage:
    Kansas
  • OCLC Number:
    741355441
  • Edition:
    Final report; Sept. 2008-May 2011.
  • Corporate Publisher:
    Kansas. Dept. of Transportation
  • NTL Classification:
    NTL-HIGHWAY/ROAD TRANSPORTATION-Bridges and Structures ; NTL-HIGHWAY/ROAD TRANSPORTATION-Materials
  • Abstract:
    This report details results from testing that was conducted to determine the bond and time-dependent ; characteristics of two lightweight concrete mixes. The lightweight mixes were evaluated to possibly ; provide a more cost-effective solution to replacing some of Kansas’ older bridges. Testing included use ; of a conventional lightweight mix and a self-consolidating lightweight mix. Sixteen Inverted T-beams ; were cast at a prestress plant to determine prestress losses that had occurred in the two lightweight mixes. ; These losses were compared to ACI, PCI, and AASHTO code equations. Creep and shrinkage prisms ; were also cast and measured to accurately determine creep and shrinkage variables for the two lightweight ; mixes. Twelve flexural beams were cast at the prestress plant and tested at Kansas State University’s ; Civil Engineering Structural Mechanics Laboratory to experimentally evaluate the development lengths of ; the lightweight mixes and to compare results with the ACI code equations. ; This study found the compressive strengths of the plant-cast lightweight concrete mixes varied greatly ; from similar mixes in laboratory testing. Low concrete strengths caused the prestress losses to be greater ; than the predicted code values. Flexural beam testing revealed that several of the pretensioned beams ; failed suddenly due to strand slip, even though this was not the predicted failure mode.
  • Format:
    PDF
  • Funding:
    C1797
  • Download URL:
    https://rosap.ntl.bts.gov/view/dot/21512/dot_21512_DS1.pdf
  • File Type:
    Filetype[PDF - 4.06 MB]
  • Collection(s):
    US Transportation Collection
  • Main Document Checksum:
    urn:sha-512:2bc59a07cfbd514fa6a37a4d75b26626fa2dfb3c1e3bfc0a0b14ac1cc312c3993fd513babce828e0224880bae23788651c02d6315461093a71b31ba45077ace1
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File Language:
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