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Advances in Concrete Construction
  Volume 6, Number 6, December 2018 , pages 631-643

Mechanical behaviour of steel fibre reinforced SCC after being exposed to fire
Tomasz Ponikiewski, Jacek Katzer, Adrian Kilijanek and Elżbieta Kuźmińska

    The focus of this paper is given to the investigation of mechanical properties of steel fibre reinforced self-compacting concrete after being exposed to fire. The research programme covered tests of two sets of beams: specimens subjected to fire and specimens not subjected to fire. The fire test was conducted in an environment mirroring one of possible real fire situations where concrete surface for an extended period of time is directly exposed to flames. Micro-cracking of concrete surface after tests was digitally catalogued. Compressive strength was tested on cube specimens. Flexural strength and equivalent flexural strength were tested according to RILEM specifications. Damages of specimens caused by spalling were assessed on a volumetric basis. A comparison of results of both sets of specimens was performed. Significant differences of all tested properties between two sets of specimens were noted and analysed. It was proved that the limit of proportionality method should not be used for testing fire damaged beams. Flexural characteristics of steel fibre reinforced self-compacting concrete were significantly influenced by fire. The influence of fire on properties of steel fibre reinforced self-compacting concrete was discussed.
Key Words
    concrete; fire; fibre; SCC; SFRC; mechanical properties
Tomasz Ponikiewski and Adrian Kilijanek: Silesian University of Technology, Faculty of Civil Engineering, Akademicka 5, 44-100 Gliwice, Poland
Jacek Katzer and Elżbieta Kuźmińska: Koszalin University of Technology, Faculty of Civil Engineering Environment and Geodetic Sciences, Śniadeckich 2, 75-453 Koszalin, Poland

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