Effect of UV and UV–Ozone Treatment of Polyolefin Fibers on Toughness of Fiber Concrete Composite

    Volume 2, Issue 1

    ISSN: 2165-3984

    CODEN: ACEMOAD

    Published Online: 20 March 2013

    Page Count: 11


    Payrow, Pouria
    Nixaz Consulting, Toronto, ON

    Nokken, Michelle R.
    Dept. of Building, Civil and Environmental Engineering, Concordia Univ., Montreal, QC

    Banu, Dorina
    Nixaz Consulting, Toronto, ON

    Schmidt, Rolf
    Dept. of Chemistry and Biochemistry, Concordia Univ., Montreal, QC

    DeWolf, Christine E.
    Dept. of Chemistry and Biochemistry, Concordia Univ., Montreal, QC

    Feldman, Dorel
    Dept. of Building, Civil and Environmental Engineering, Concordia Univ., Montreal, QC

    (Received 13 June 2012; accepted 19 February 2013)

    Abstract

    Ultraviolet (UV) irradiation and a combination of UV irradiation and ozone treatment of polyolefin fibers were investigated for possible improvement of mechanical properties in concrete composites. In both treatment methods, various fiber exposure durations were used, and surface modification was monitored by measuring the water contact angle. Untreated and treated fibers were added to concrete at 0.32 % by volume, and the specimens were tested for flexural strength according to ASTM International specifications. Fiber surface treatment by UV alone was found to be an unattractive technique based on the results of flexural tests and contact angle measurements. Ten minutes of UV and ozone surface treatment of fibers was found to improve the composite peak stress by 11 % and the toughness by 4 %; longer periods of exposure led to lower flexural strength results, perhaps as a result of fiber deformation or degradation.


    Paper ID: ACEM20120014

    DOI: 10.1520/ACEM20120014

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    Author
    Title Effect of UV and UV–Ozone Treatment of Polyolefin Fibers on Toughness of Fiber Concrete Composite
    Symposium , 0000-00-00
    Committee C09