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    Bond of Reinforcement to Superplasticized Concrete

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    Darwin_1986.pdf (652.2Kb)
    Issue Date
    1986
    Author
    Brettmann, Barie B.
    Darwin, David
    Donahey, Rex C.
    Publisher
    American Concrete Institute
    Type
    Article
    Article Version
    Scholarly/refereed, publisher version
    Published Version
    https://iri.ku.edu/reports
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    Abstract
    The effects of superplasticizers on concrete-steel bond strength were studied. Key variables were degree of consolidation; concrete slump, both with and without a superplasticizer; concrete temperature; and bar position. No. 8 deformed reinforcing bars were used with a 2-in (51mm) cover and a 10 in. (254 mm) bonded length. Concrete slumps ranged from 1 3/4 in to 9in. (44 to 229 mm). Three specimens depths were used. All specimens were modified cantilever beam specimens. The experimental results show that high-slump superplasticized concrete provides a lower bond strength than low-slump concrete of the same strength. Vibration of high-slump concrete increases the bond strength compared to high-slump concrete without vibration. The current ACI top-bar requirements appear to be unconservative for top-cast bars with less than 12 in. (305 mm) of concrete below the bar and are possibly overconservative for nontop-cast bars with more than 12 in. 305 (mm) of concrete below the bar when low-slump concrete is used.
    URI
    http://hdl.handle.net/1808/23425
    Collections
    • Infrastructure Research Institute Scholarly Works [282]
    Citation
    Brettmann, B.B., Darwin, D., Donahey, R.C., "Bond of Reinforcement to Superplasticized Concrete," ACI Journal Vol. 83, No. 12, January-February 1986, pp. 98-107.

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    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
     

     

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