This article presents a study of the dependence of the deflation of fine grain dust on the air flow rate, as well as other factors affecting it. This study is important for the summary calculation of the dispersion of emissions of harmful substances from unorganized sources of enterprises into the atmospheric urban air, as well as for the selection of dust suppression measures and a better understanding of the processes of dust propagation.

Keywords: grain dust, dispersed composition, aerodynamic characteristics, specific deflation, dust propagation, atmospheric air

The paper discusses specific reasons for strengthening footings and reinforcing foundations and explores the principal technologies for installing auger cast piles used for reconstruction of building systems. In order to identify the key benefits of using auger cast piles, the existing technologies are analyzed based on the study of domestic and foreign patents. The main principles are set out underlying an economically sound, technically and technologically justified choice of foundation reinforcement technology.

Keywords: reconstruction, bearing capacity, strengthening, reinforcement, piles, anchors, patent search, drawbacks and benefits

The focus of attention is on the possibility of replacing exterior envelope structures for reconstruction of industrial buildings with the aim of increasing the plant areas. The operating procedures are shown alongside the material characteristics ensuring energy efficiency of reconstruction. The paper underlines that the justification of the optimal choice of a process setup / technology solution is an important stage in building reconstruction.

Keywords: three-layer envelope structures, fiber-reinforced foamed concrete units, composite foams, insulating properties, lightweight, efficiency