The relevance of the use of gas-filled concrete in construction is reflected. The problems of forming high-quality cellular structures are listed. It is noted that in aerated concrete, these problems are successfully solved by prescription methods, and to obtain high-quality foam concrete, it is necessary to take into account the energy characteristics of the interaction between the dispersed gas phase packed in foam films and the cement-sand slip. The most important factors of controlling the structure of foam concrete mixtures are revealed. It is proposed to consider foam concrete mixtures as a complex hierarchically multilevel system, the properties of which depend in a decisive way on the interaction between water and surfactant molecules. The process of moving surfactant molecules from the volume of the liquid phase to the gas-liquid interface is theoretically considered. The results of experimental studies of the effect of fiber consumption on the kinetics of plastic strength of mixtures, the density of the resulting concretes, and the measure of their loss of the dispersed gas phase during the phase transition from a viscous state to an elastic one are presented. Based on the experimental results and scientific generalizations, a conclusion is formulated about the causes and conditions for the preservation of the dispersed gas phase in the structure of foam concrete mixtures.

Keywords: foam concrete mixture, dispersed gas phase

A brief historical overview of the evolution of requirements for the performance properties of wall materials is given. It is shown that the list of types of wall materials used is regulated by the level of urbanization of society and modern requirements for energy and resource conservation. An analysis of the types of defects that occur in multilayer walls of buildings during their operation has shown that the most important cause of their occurrence is an incorrect combination of materials with different porosity. The importance of taking into account the "single-layer" factor in construction, which allows ensuring the quality of construction and operation of buildings in Russia's diverse and difficult climatic conditions, was noted. Information is provided on the product range and operational advantages of non-autoclaved fiberfoam concrete as a material suitable for the construction of single-layer walls and capable of improving their protective and acoustic properties.

Keywords: safe use of premises, energy-efficient construction, gas-filled concrete, multilayer walls, mold, fiberfoam concrete, strength, thermal conductivity

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