The Compatibility of Finishing Layer and Substrate of External Surface of Buildings Walls in Environment of Variable Humidity and Temperature

Abstract

External surface of building walls is continuously effected by the natural climate phenomena of variable intensity and the factors occurring due to the anthropogenic activity. The heat and mass exchange between outside air and walls is the most distinct in a relatively thin (1 - 3 cm) surface layer. The activity of physical processes, substantial variations of temperature and moisture and the effects of various origins are particularly distinct in the above layer. Durability of the surfaces depends on the prevailing climate effects and on a complex of physical and mechanical values of the materials used. The complex and partial methods have been worked out for application at investigation of destruction processes. Partial methods have been applied in the cases of investigation of the physical and mechanical characteristics, which are necessary to be evaluated before direct weather durability test in the climatic chamber along the program of simulated effects. It is established that the paint under consideration should be grouped according to their nature and character of macrostructure and ground layer to be covered by paint according to their capillary structure and moisture deformations.