The paper presents a one-stage method of development results to obtaining effective structural and thermal insulation products based on cellular concrete with variatropic structure and the study of their properties. In addition, the paper presents the study's results on determining the influence of initial components quantitative ratio of the foam-aerated concrete mixture and technological regimes. For this purpose, a model system [Ca(OH)2;Al;H2O;NaF] has been created. The effect of the foam-aerated concrete mixture's form filling ratio (1.0÷0.7) and the perforation index of the form walls on the formation and properties of cellular concrete with a variatropic structure is studied. Influence of variatropic structure of cellular concretes on strength characteristics of products based on them is studied. It is confirmed that products based on cellular concrete with variable density from the periphery have sufficiently good thermal insulation properties due to the low density in the central zone. Concurrently, it meets all the required indicators of strength, hardness and erosion resistance due to the high density of the surface layer. At the same time, the absence of a sharp boundary prevents the zone appearance of contractive stresses and condensate accumulation. The experimental results confirm the possibility of obtaining products based on variatropic cellular concrete with the specified properties and producing building products and structural elements with higher strength indicators than similar products based on monotonic cellular concrete while maintaining material intensity.
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Bruyako et al. (2022) studied this question.