The paper presents the research results of the influence of materials, which change a phase on the exterior surface of the outer shell, on forming of the heat flow mean value for one year, calculated on change of the exterior temperature per every three hours. The correlation between heat flow and characteristics of the phase-change material was studied. Such materials increase heat lag of the outer shell and allow reducing the amount of electric energy required to keeping of indoor climate. The paper presents the research results of the influence of materials, which change a phase on the exterior surface of the outer shell, on forming of the heat flow mean value for one year, calculated on change of the exterior temperature per every three hours. The correlation between heat flow and characteristics of the phase-change material was studied. Such materials increase heat lag of the outer shell and allow reducing the amount of electric energy required to keeping of indoor climate. Based on the implementation of the method of math planning of experiments the sufficient math model of the dependence of the heat flow density on the material coating thickness, latent heat of transition, heating capacity value and thermal conductivity before and after phase change was made. The mathematical model coefficients were interpreted and best values of very factors based on desirability function were determined. Based on these data the selection of the material with phase-change temperature of about 0 0C for Krasnoyarsk was made.

Keywords: energy efficiency, heat flow, heat saving, heat-storing material, phase-change heat storing, phase-change material

The influence of grain composition and active mineral addition of microsilicasuspension on properties of dry concrete mix was considered. The selection of the method of production of paving slabs with allowance for technological modes of vibropressing technology was made. The optimum dose of microsilicasuspension, having positive effect on the concrete quality, was defined.

Keywords: grain composition, dry mix, process of hydration, microsilica, paving slabs, heavy concrete, compressive breaking strength, abrasion capacity