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Performance of self-consolidating concrete in prestressed girders.
  • Published Date:
    2010-04-01
  • Language:
    English
Filetype[PDF-4.05 MB]


Details:
  • Corporate Contributors:
  • Publication/ Report Number:
    FHWA/ALDOT 930-602
  • Resource Type:
  • Geographical Coverage:
  • OCLC Number:
    715302638
  • Edition:
    Technical report.
  • NTL Classification:
    NTL-HIGHWAY/ROAD TRANSPORTATION-Bridges and Structures ; NTL-HIGHWAY/ROAD TRANSPORTATION-MaterialsNTL-HIGHWAY/ROAD TRANSPORTATION-Construction and Maintenance ; NTL-HIGHWAY/ROAD TRANSPORTATION-Design ; NTL-HIGHWAY/ROAD TRANSPORTATION-Pavement Management and Performance ;
  • Format:
  • Abstract:
    A structural investigation of self-consolidating concrete (SCC) in AASHTO Type I precast,

    prestressed girders was performed. Six test girders were subjected to transfer length and

    flexural testing. Three separate concrete mixtures, two girders per mixture, were used to

    construct these specimens. A moderate-strength, conventional-slump concrete mixture, similar

    to the concrete used in typical ALDOT girders was evaluated versus moderate-strength SCC

    and high-strength SCC. No significant difference in transfer bond behavior was found between

    the full-scale SCC girders and the conventional concrete girders. High-strength SCC girders

    had shorter transfer lengths than moderate-strength (SCC and conventional) girders. After

    normalization to account for the difference in prestress magnitude and concrete strength, there

    was no discernible difference in the magnitude of the transfer lengths between the concrete

    types. After a composite, cast-in-place concrete deck was added to each girder, flexural

    testing was performed near each girder end, resulting in two flexural tests per girder.

    Embedment lengths were varied for each test in order to bracket the AASHTO strand

    development length. Results indicated that the use of SCC had no adverse effects on the

    overall flexural performance, and the flexural bond lengths were conservatively predicted by

    the relevant ACI and AASHTO expressions. Similarly, the SCC girders exhibited comparable

    service-level performance to the conventional girders. Based on the work performed in this

    study SCC should perform well in prestressed concrete girder applications.

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