KUKU

KU ScholarWorks

  • myKU
  • Email
  • Enroll & Pay
  • KU Directory
    • Login
    View Item 
    •   KU ScholarWorks
    • Engineering
    • Infrastructure Research Institute Scholarly Works
    • View Item
    •   KU ScholarWorks
    • Engineering
    • Infrastructure Research Institute Scholarly Works
    • View Item
    JavaScript is disabled for your browser. Some features of this site may not work without it.

    Bond of Epoxy-Coated Reinforcement to Concrete: Bar Parameters

    Thumbnail
    View/Open
    darwin_epoxy.pdf (1.390Mb)
    Issue Date
    1990-01
    Author
    Choi, Oan Chul
    Hadje-Ghaffari, Hossain
    Darwin, David
    McCabe, Steven L.
    Publisher
    University of Kansas Center for Research, Inc.
    Type
    Technical Report
    Is part of series
    SL Report;90-1
    Published Version
    https://iri.ku.edu/reports
    Metadata
    Show full item record
    Abstract
    The effects of coating thickness, deformation pattern, and bar size on the reduction in bond strength between reinforcing bars and concrete caused by epoxy coating are described. Tests include beam-end and splice specimens containing No. 5, No. 6, No. 8, and No. 11 bars with average coating thicknesses ranging from 3 to 17 mils. Three deformation patterns are evaluated. All bars are bottom-cast. Beam-end specimens have covers of 2 bar diameters, while splice specimens have covers that depend on bar size and are less than 2 bar diameters. The results are compared with the splice tests that were used to establish the epoxy-coated bar provisions in the 1989 ACI Building Code and 1989 AASHTO Bridge Specifications. Epoxy coatings are found to significantly reduce bond strength, but the extent of the reduction is less than used to select the development length modification factors in the ACI Building Code and AASHTO Bridge Specifications. Coating thickness has little effect on the amount of bond strength reduction for No. 6 bars and larger. However, the thicker the coating, the greater the reduction in bond strength for No. 5 bars and smaller. In general, the reduction in bond strength caused by an epoxy coating increases with bar size. The magnitude of the reduction depends on the deformation pattern: bars with relatively larger ribbearing areas are affected less by the coating than bars with smaller bearing areas. This is the first in a series of reports. Subsequent reports will address the effects of concrete cover, bar position, concrete strength, and transverse reinforcement.
    URI
    http://hdl.handle.net/1808/20404
    Collections
    • Infrastructure Research Institute Scholarly Works [324]
    Citation
    Choi, O.C., Hadje-Ghaffari, H., Darwin, D., and McCabe, S.L., "Bond of Epoxy-Coated Reinforcement to Concrete: Bar Parameters," SL Report 90-1, The University of Kansas Transportation Center, January 1990, 46 pp.

    Items in KU ScholarWorks are protected by copyright, with all rights reserved, unless otherwise indicated.


    We want to hear from you! Please share your stories about how Open Access to this item benefits YOU.


    Contact KU ScholarWorks
    785-864-8983
    KU Libraries
    1425 Jayhawk Blvd
    Lawrence, KS 66045
    785-864-8983

    KU Libraries
    1425 Jayhawk Blvd
    Lawrence, KS 66045
    Image Credits
     

     

    Browse

    All of KU ScholarWorksCommunities & CollectionsThis Collection

    My Account

    LoginRegister

    Statistics

    View Usage Statistics

    Contact KU ScholarWorks
    785-864-8983
    KU Libraries
    1425 Jayhawk Blvd
    Lawrence, KS 66045
    785-864-8983

    KU Libraries
    1425 Jayhawk Blvd
    Lawrence, KS 66045
    Image Credits
     

     

    The University of Kansas
      Contact KU ScholarWorks
    Lawrence, KS | Maps
     
    • Academics
    • Admission
    • Alumni
    • Athletics
    • Campuses
    • Giving
    • Jobs

    The University of Kansas prohibits discrimination on the basis of race, color, ethnicity, religion, sex, national origin, age, ancestry, disability, status as a veteran, sexual orientation, marital status, parental status, gender identity, gender expression and genetic information in the University’s programs and activities. The following person has been designated to handle inquiries regarding the non-discrimination policies: Director of the Office of Institutional Opportunity and Access, IOA@ku.edu, 1246 W. Campus Road, Room 153A, Lawrence, KS, 66045, (785)864-6414, 711 TTY.

     Contact KU
    Lawrence, KS | Maps