A Boltzmann transformation method for investigation of water vapor transport in building materials

A Boltzmann transformation method that allows determination of water vapor transport properties of building materials as functions of relative humidity during a single experiment is presented. The method is tested at the laboratory measurements on autoclaved aerated concrete. Determination of diffusion coefficient by standard steady-state cup method is done as well, for the sake of comparison. The measured results are discussed with regard to the practical application of the method in materials research and building practice.