The aim of this work is to carry out a numerical study on the coupled heat and mass transfers in a concrete element exposed to elevated temperature in order to explain the behaviour observed during experimental studies. Comparisons were drawn on numerical and experimental results on the thermo-hydrous behavior of a concrete element. Parametric analyses were carried out in order to underline main parameters involved in concrete behavior at high temperature. The numerical and experimental results included thermal gradient, water vapor pressure, relative humidity, concrete mass losses due to dehydration, water content for a concrete element heated from 20 to 600 °C. The results show high thermal gradients and high vapor pressure in the concrete element in addition to the damage due to concrete chemical transformations at high temperature.

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