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Functional enhancement of concrete, giving it heat-resistant properties becomes possible while adding mill ground additions based on silicon carbide materials of the region. The selection of silicon carbide waste and secondary production materials as a filler for the production of concrete with heat-resistant properties was based on the following principles: dispersion, the chemical composition, phase composition that reflect the chemical activity of the material in relation to the concrete binder. The thermal resistance of concrete has increased fivefold. In forming concrete structures with addition of silicon carbide occurs embedding into the structure of hydrates fine powder silicon carbide cyclone dust, with the chemical processes behaviour in the boundary contact zone between binder and filler. The increase of thermal resistance can attribute the resulting concrete composition to the category of heat-resistant concretes, and that significantly expands the functionality of concrete.

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The article presents the results of calculations on changing the thermophysical properties of the connectivity node of the outer wall and the balcony plate resting on the cantilever fixed steel beams. A variant of insulation of steel beams with super-thin liquid insulation under the reconstruction of existing brick buildings with single-layer brick walls is proposed. The graphical analysis of the problem was carried out. The results of calculations of temperature with linear thermophysical properties show that the method of steel beams insulation within the conditions of reconstruction of residential buildings makes it possible to increase the building life. When using super-thin thermal insulation coatings, it is possible to reduce the local freezing of the balcony plate.

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