ABSTRACT
Variations of sorption moisture in the surface layer of enclosures result in moisture-caused deformations which must be evaluated together with sorption-desorption processes in the construction. The dependence of the basic building materials of enclosure constructions upon change in material moisture with variation of relative humidity of the air was investigated by way of experiments. The influence of sorption moistening values upon moisture-caused deformations of materials is not described in literature and standards. Therefore, the usual deformations measuring methods had to be amended by measuring moisture deformations in various models and by setting sorption moisture. According to the methods described in this article, the dependence of deformations of various construction materials upon moisture and changes therein were investigated. Analysing of moisture-caused deformations of materials with different capillary structures enables us to provide in a very concise form-some references concerning volume and nature of deformations.
