In
this work one described different types of diffusion, which proceed in
capillary-porous medium. Next one presented theoretical expressions, which
described dependence between coefficients of volumetric and surface diffusion
and temperature. One introduced idea of effective water vapour diffusion
coefficient taking into account both analysed mechanisms of water vapour
transport and one gave relation coupling it with coefficients of volumetric
diffusion and diffusion in adsorptive film of liquid. One presented results of
experimental research of dependence of effective diffusion coefficient of
gypsum on temperature and sorption isotherm of gypsum. On the basis of obtained
results one estimated surface diffusion coefficient of gypsum.