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    Effect of Superplasticizers on Concrete-Steel Bond Strength

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    Issue Date
    1984-04
    Author
    Brettmann, Barie B.
    Darwin, David
    Donahey, Rex C.
    Publisher
    University of Kansas Center for Research, Inc.
    Type
    Technical Report
    Is part of series
    SL Report;84-1
    Published Version
    https://iri.ku.edu/reports
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    Abstract
    The effects of superp 1 asti ci zers on concrete-steel bond strength are studied. Key variables are degree of consolidation, concrete slump, both with and without a superplasticizer, concrete temperature, and bar position. #8 deformed reinforcing bars were used with a 2 in. cover and a 10 in. bonded length. Concrete slumps ranged from 1-3/4 in. to 9 in. Three specimen depths were used. All specimens were modified cantilever beam specimens. Based on the experimental results, high slump superplasticized concrete pro vi des a 1 ower bond strength than 1 ow slump concrete of the same strength. Superpl asti ci zed concrete pro vi des a higher bond strength than high slump regular concrete with the same slump and water-cement ratio. Vibration of high slump concrete increases the bond strength compared to high slump concrete without vibration. Bond strength decreases as the amount of concrete below a bar increases, but the greatest effect appears to occur with top-cast (i.e. upper surface) bars.
    URI
    http://hdl.handle.net/1808/20347
    Collections
    • Infrastructure Research Institute Scholarly Works [327]
    Citation
    Brettmann, B.B., Darwin, D., Donahey, R.C., "Effect of Superplasticizers on Concrete-Steel Bond Strength," SL Report 84-1, The University of Kansas Center for Research Inc., Lawrence, KS, April 1984, 35 pp

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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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