Theoretical studies of non-stationary mousture phisical processes in building envelope

The author has carried out theoretical studies of moisture physical processes occurring in the three-layer thicker walling. There are joint processes of heat and moisture inside the structure, often accompanied by phase changes of moisture in the porous structure of the building materials, depending on the physical properties of the material enclosing structures (density, thermal conductivity, moisture permeability, water vapor permeability, etc.). The author has designed the mathematical apparatus of non-stationary moisture in materials, depending on the ambient temperature changes. Empirical dependences of the partial pressure of saturated vapor in the air and the partial pressure of the material layers of the building envelope have been received in the result of the research. They can be implemented in the simulation to calculate the parameters of moisture physical processes in the protecting structures of buildings in an unsteady mode.