About the authors
| First name, Middle name, Last name, Scientific degree, Scientific rank, Current position. Full and brief name of the organization, The organization address. | Kupriyanov V.N. – doctor of technical sciences, professor E-mail: This e-mail address is being protected from spambots. You need JavaScript enabled to view it Yuzmuhametov A.M. – post-graduate student E-mail: This e-mail address is being protected from spambots. You need JavaScript enabled to view it Safin I.Sh. – candidate of technical sciences, associate professor E-mail: This e-mail address is being protected from spambots. You need JavaScript enabled to view it Kazan State University of Architecture and Engineering The organization address: 420043, Russia, Kazan, Zelenaya st., 1 |
| Title of the article | Influence of moisture on heat conductivity of walling materials. the state of the issue |
| Abstract. | Problem statement. Thermal characteristics of building materials of walling are significantly altered because of changes in humidity of the materials throughout the year. Changing the value of the thermal conductivity is mostly dependent on the moisture content. Results. The researches of influence of various factors on the coefficient of thermal conductivity efficiency were conducted by many scientists. The famous research works deal with the impact of the material structure, porosity, pore size, temperature, moisture, ice content and other factors. However, many aspects of the problem remain unknown. For example, while studying the influence of moisture of the materials on their thermal properties, the influence of high moisture of the material (volume or mass) on the thermal conductivity coefficient is studied. Whereas the information about the influence of low humidity values associated with the sorption of moisture from humid air and water vapor diffusion through the building walling is very limited. Conclusions. The research indicated that the increase of moisture of the material enhances the coefficient of thermal conductivity, but the degree of change in the thermal conductivity of different materials is different in various ranges of humidity. The thermal conductivity coefficient of construction materials is investigated without paying attention to the moisture in the porous structure of the material, namely, adsorbed, pellicular, capillary moisture etc. The majority of researches on thermal conductivity coefficient does not take into account the type of bond between moisture and building material, Whereas our study allows to determine the thermal performance of building walling, depending on the type of operating moisture within a wide range of its alteration. |
| Keywords. | heat conductivity, temperature, sorption, desorption, moisture, capillaries, porosity. |
| For citations: | Kupriyanov V.N., Yuzmuhametov A.M., Safin I.Sh. Influence of moisture on heat conductivity of walling materials. the state of the issue // Izvestiya KGASU. 2017. №1(39) P.102-110. |
