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Mechanical properties of steel fibre reinforced concrete exposed at high temperatures

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Abstract

Steel fibre reinforced concrete (SFRC) is an advanced cementitious composite where fibres can act as a profitable replacement for diffused reinforcement, like welded steel mesh, especially for thin cross sections. In this case fire becomes a very important condition in the design. Previous experimental research has shown the benefits in fire resistance of steel fibres, when structural elements are bent. A careful mechanical characterization of a SFRC used for prefabrication after thermal cycles at high temperature is here presented. Three different tests are considered: four point bending, uniaxial compression and fixed-end uniaxial tension. In the paper the decay of peak and post-cracking strengths versus temperature increase for uniaxial compression, uniaxial tension and bending are discussed.

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Acknowledgments

The authors thank Magnetti Larco-Building for the technical support in the cast of the specimens. The research was financially supported by the Italian Ministry for the Education, University and Research (PRIN 2004).

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Authors and Affiliations

  1. Department of Structural Engineering, Politecnico di Milano, Milan, Italy

    Matteo Colombo, Marco di Prisco & Roberto Felicetti

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  1. Matteo Colombo
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  2. Marco di Prisco
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  3. Roberto Felicetti
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Correspondence to Matteo Colombo.

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Colombo, M., di Prisco, M. & Felicetti, R. Mechanical properties of steel fibre reinforced concrete exposed at high temperatures. Mater Struct 43, 475–491 (2010). https://doi.org/10.1617/s11527-009-9504-0

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