Basic techniques for the damage assessment of concrete members after fire

Generally, concrete structures behave very well during a fire. After a fire, it could be of economical interest to reuse the structure after appropriate repair based on reliable assessment of the strength properties. This paper demonstrates how the strength may be assessed from drilled cores by measuring the weight increase of the concrete after water immersion. Furthermore, the effect on the remaining strength of a change of heating rate, duration at target temperature, water cooling and post-cooling storage is studied. Considering the effect of the storage period, a stress/strain model is developed for both traditional and self-compacting concrete.

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