Title:
Mechanical properties of steel fibre reinforced concrete exposed at high temperatures
Author(s):
Matteo Colombo, Marco di Prisco, Roberto Felicetti
Publication:
RILEM
Volume:
43
Issue:
4
Appears on pages(s):
475-491
Keywords:
Steel fibre reinforced concrete (SFRC), High temperature, Bending, Uniaxial tension, Uniaxial compression, Residual strength, Thermal Damage
DOI:
Date:
4/6/2010
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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