Volume 42, Issue 2 (March 2014)

    Curling Control in Concrete Slabs Using Fiber Reinforcement

    (Received 15 April 2012; accepted 13 August 2013)

    Published Online: 2014

    CODEN: JTEOAD

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    Abstract

    Curling of concrete remains a major concern in flatwork and its mitigation is critical for crack control, durability, and mechanical performance, not to mention the aesthetics. This report describes a study on concrete slabs that were subjected to a controlled environment of sustained heat and humidity. The resultant curling was evaluated by means of strain gauges placed along the length and breadth of the slab. In addition to the reference plain concrete mix, three fiber reinforced mixes were cast with cellulose microfibers incorporated at a volume fraction up to 0.3 %. The results show that plain concrete will crack and thereby ease the amount of curl whereas the addition of fibers at low dosage rates (<=0.2 %) leads to crack control and consequently, a visible increase in curling. However, at 0.3 % volume fraction, cellulose fibers were able to arrest cracking and also reduce the curl with respect to the reference plain mix.


    Author Information:

    Banthia, N.
    Department of Civil Engineering, Univ. of British Columbia, Vancouver, BC

    Bindiganavile, V.
    Deptartment of Civil and Environmental Engineering, Univ. of Alberta, Edmonton, AB

    Azhari, F.
    Department of Civil Engineering, Univ. of British Columbia, Vancouver, BC

    Zanotti, C.
    Department of Civil Engineering, Univ. of British Columbia, Vancouver, BC


    Stock #: JTE20120111

    ISSN: 0090-3973

    DOI: 10.1520/JTE20120111

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    Author
    Title Curling Control in Concrete Slabs Using Fiber Reinforcement
    Symposium , 0000-00-00
    Committee C09