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    Effect of Corrosion Inhibitors on Concrete Pore Solution Composition and Corrosion Resistance

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    O’Reilly_2013.pdf (452.2Kb)
    Issue Date
    2013-09
    Author
    O’Reilly, Matthew
    Darwin, David
    Browning, JoAnn
    Xing, Lihua
    Locke, Carl E., Jr.
    Virmani, Y. Paul
    Publisher
    American Concrete Institute
    Type
    Article
    Article Version
    Scholarly/refereed, publisher version
    Published Version
    https://iri.ku.edu/papers
    Rights
    Copyright © 2013, 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 in the July-August 2014 ACI Materials Journal if the discussion is received by April 1, 2014.
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    Abstract
    Three commercially available corrosion inhibitors—calcium nitrite, a solution of amines and esters, and an alkenyl-substituted succinic acid salt—are evaluated in conjunction with conventional reinforcement in concrete based on corrosion rate, metal loss, the critical chloride corrosion threshold (CCCT), pore solution analyses, and concrete compressive strength. All three inhibitors increase time to corrosion initiation and decrease corrosion rate, but are less effective in cracked concrete than in uncracked concrete. Of the three inhibitors, the alkenyl-substituted succinic acid salt results in the greatest decrease in corrosion rate, but exhibits the lowest CCCT—below that measured in concrete with no inhibitor. The compressive strengths of concretes containing the amine-ester inhibitor and the alkenyl substituted succinic acid salt were 15% and 60% lower, respectively, than concrete without an inhibitor. For the latter inhibitor, pore solution analyses indicated elevated sulfate contents at 1 and 7 days, which may explain the low CCCT and strength. Paste containing the amine-ester inhibitor had an elevated sulfate content at 7 days.
    URI
    http://hdl.handle.net/1808/31321
    Collections
    • Infrastructure Research Institute Scholarly Works [324]
    Citation
    O'Reilly, M., Darwin, D., Browning, J., Xing, L., Locke Jr., C.E., and Virmani, P., "Effect of Corrosion Inhibitors on Concrete Pore Solution Composition and Corrosion Resistance," ACI Materials Journal, Vol. 110, No. 5, September-October 2013, pp. 577-585.

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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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