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The effect of exposure to elevated temperatures on the fracture energy of plain concrete

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Abstract

Results are given for the fracture energy of concrete preheated to temperatures in the range of 20°C–600°C, then tested at room temperature in three-point bending, for both slowly-cooled specimens and those delivered a thermal shock. Fracture energy measurement techniques are discussed, and comparisons made across previous studies. The results suggest a significant difference between residual and ‘hot’ capacities, along with a temperature dependence on the ductile-brittle transition.

Résumé

On présente des résultats concemant l'énergie de fracture de bétons préchauffés de 20 à 600°C, puis essayés à température ambiante en flexion 3 points, à la fois sur des éprouvettes refroidies lentement et sur des éprouvettes ayant subi un choc thermique. On discute les techniques de mesure de l'énergie de fracture et on compare les résultats avec ceux obtenus dans des études antérieures. Les résultats laissent entrevoir une différence importance entre les capacités résiduelles et les capacités «à chaud», ainsi qu'une dépendance de la transition ductile-fragile par rapport à la température.

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Authors and Affiliations

  1. Department of Civil Engineering, The University of Queensland, 4072, Queensland, Australia

    Graham Baker

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  1. Graham Baker
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Baker, G. The effect of exposure to elevated temperatures on the fracture energy of plain concrete. Mat. Struct. 29, 383–388 (1996). https://doi.org/10.1007/BF02486347

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