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    Corrosion-Induced Concrete Cracking for Uncoated and Galvanized Reinforcing Bars

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    Issue Date
    2018-11
    Author
    Darwin, David
    O'Reilly, Matthew
    Farshadfar, Omid
    Browning, JoAnn
    Locke, Carl, Jr.
    Publisher
    American Concrete Institute
    Type
    Article
    Article Version
    Scholarly/refereed, publisher version
    Published Version
    https://iri.ku.edu/papers
    Rights
    Copyright © 2018, American Concrete Institute. All rights reserved, including the making of copies unless permission is obtained from the copyright proprietors. Pertinent discussion including author’s closure, if any, will be published ten months from this journal’s date if the discussion is received within four months of the paper’s print publication.
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    Abstract
    Corrosion-related cracking in reinforced concrete is caused by expansive corrosion products and the resulting tensile stresses. While the amount of corrosion to cause cracking has been studied for uncoated conventional reinforcement, significantly less is known about the corrosion loss at cracking for galvanized reinforcement. Conventional and galvanized bars were cast in chloride- contaminated concrete. Clear cover to the bar ranged from 0.5 to 2 in. (12.7 to 51 mm). Specimens were tested both with and without the use of impressed current to drive corrosion. It was found that galvanized reinforcement requires greater corrosion losses to crack concrete than conventional steel reinforcement. Visual observations at autopsy suggest that the cracking of the concrete specimens containing galvanized reinforcement was not due to zinc corrosion products, but rather to corrosion products from intermetallic iron-zinc layers or from the underlying steel. Further study is needed to determine the exact nature of these corrosion products. Tests using impressed current may be used to establish the corrosion loss required to cause cracking.
    URI
    http://hdl.handle.net/1808/29634
    DOI
    https://doi.org/10.14359/51706839
    Collections
    • Infrastructure Research Institute Scholarly Works [324]
    Citation
    O’Reilly, M., Farshadfar, O., Darwin, D., Browning, J., and Locke, C., “Corrosion-Induced Concrete Cracking for Uncoated and Galvanized Reinforcing Bars,” ACI Materials Journal, Vol. 115, No. 6, Nov. 2018, pp. 825-832.

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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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