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    Interlaboratory study of standard methods for testing multiwire steel prestressing strand

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    2020 Lequesne, Collins, Lucon, Darwin, Poudel; Interlaboratory study of standard.pdf (886.5Kb)
    Issue Date
    2020-07
    Author
    Lequesne, Rémy D.
    Collins, William N.
    Lucon, Enrico
    Darwin, David
    Poudel, Ashwin
    Publisher
    Precast/Prestressed Concrete Institute
    Type
    Article
    Article Version
    Scholarly/refereed, publisher version
    Metadata
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    Abstract
    An interlaboratory study involving 19 laboratories was conducted to quantify the precision of ASTM A1061-16, Standard Test Methods for Testing Multi-Wire Steel Prestressing Strand, which describes methods for measuring yield strength, elastic modulus, elongation, breaking strength, and relaxation. Relaxation measurements were outside the project scope. Yield strength, elastic modulus, and breaking strength results showed low variability, with reproducibility limits less than 4%, 10%, and 3% of the mean reported values, respectively. Elongation results exhibited high variability, resulting in a reproducibility limit close to 50% of the mean reported value. Compliance with the requirements of the standard was an issue, with 74%, 82%, 32%, and 100% of laboratories submitting valid results for yield strength, elastic modulus, elongation, and breaking strength, respectively. Strand fracture location was sensitive to the type of grips used for testing. Several changes to ASTM A1061 are proposed to improve clarity and precision.
    URI
    http://hdl.handle.net/1808/32686
    DOI
    https://doi.org/10.15554/pcij65.4-03
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    • Civil, Environmental & Architectural Engineering Scholarly Works [117]

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    785-864-8983

    KU Libraries
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    Lawrence, KS 66045
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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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