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    Lightweight Aggregate as Internal Curing Agent to Limit Concrete Shrinkage

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    Browning_ACI_2011.pdf (632.9Kb)
    Issue Date
    2011
    Author
    Browning, JoAnn
    Darwin, David
    Reynolds, Diane
    Pendergrass, Benjamin
    Publisher
    American Concrete Institute
    Type
    Article
    Published Version
    https://iri.ku.edu/reports
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    Abstract
    The effectiveness of prewetted, vacuum-saturated (PVS) lightweight aggregate (LWA) as an internal curing agent to reduce concrete shrinkage is evaluated for curing periods of 7 and 14 days. Normalweight aggregate is replaced by LWA at volume replacement levels ranging from 8.9 to 13.8%. Some mixtures contain a partial replacement of portland cement with slag cement while maintaining the paste content at approximately 24.1% of concrete volume. Comparisons are made with mixtures containing low-absorption granite and high absorption limestone normalweight coarse aggregates. At the replacement levels used in this study, PVS LWA results in a small reduction in concrete density, no appreciable effect on concrete compressive strength, and a substantial decrease in concrete shrinkage for drying periods up to 365 days. Increasing the curing period from 7 to 14 days reduces concrete shrinkage. Thirty and 60% volume replacements of portland cement by slag cement result in reduced shrinkage when used with a porous LWA or normalweight aggregate. After 30 and 365 days of drying, all mixtures with LWA exhibited less shrinkage than the mixtures with either low- or high-absorption normalweight aggregates.
    URI
    http://hdl.handle.net/1808/23331
    Collections
    • Infrastructure Research Institute Scholarly Works [324]
    Citation
    Browning, J., Darwin, D., Reynolds, D., and Pendergrass, B., “Lightweight Aggregate as Internal Curing Agent to Limit Concrete Shrinkage,” ACI Materials Journal, Vol. 108, No. 6, Nov.-Dec. 2011, pp. 638-644.

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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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