Modeling of 3D moisture distribution in heated concrete: From continuum towards mesoscopic approach

•In-situ neutron tomography experiments on heated concrete are used for the first time in this paper to support the results (temperature and 3D moisture distribution) of a fully coupled thermo-hydro-mechanical model.•The influence of the experimental boundary condition on the moisture distribution is explored.•A 3D mesoscale extension of the model taking into account explicitly the concrete components (aggregates, cementitious matrix etc.) is proposed.