The purpose of this work is a comparative analytical assessment of the axial compressive strength of foam concrete depending on its density grade, taking into account strength losses in the presence of surface-active substances, porosity, and strength characteristics of the matrix material. The values specified in GOST 25485-89 and calculated according to the proposed analytical laws and regulatory data are compared. The effect of the foaming reagent on the strength of the foam matrix was evaluated in accordance with GOST 30744-2001 on standard samples-beams 40x40x160 mm in size from the control cement test without additives and with additives of synthetic and protein foaming agents of different concentrations in the sealer (from 0.3 to 3%). The degree of influence of the foaming agent on the strength of the finished foam concrete prepared using classical technology was performed on samples-cubes of 100x100x100 mm in size according to GOST 10180-90. The article presents the results of a study of uniaxial compression strength calculated for cellular concrete depending on the density grades known from these regulatory documents and other sources. Analytical expressions for determining the strength calculated for cellular concrete with an average density of 300-900 kg/m3 are presented. The proposed approach, based on the assessment of the initial data – the strength class of the binder, porosity, matrix strength, type and concentration of the foaming agent-allows us to predict the final strength of foam concrete products of this average density. Their rational accounting will help in the production of construction products of the maximum possible strength at a given density. This will expand the use of foam concrete in construction.

The use of buildings frame elements formed from thin-walled unclosed profiles located in a monolith-ic foam concrete array is considered. This technical solution provides a number of advantages in comparison with the standard version of metal frames, including increasing the overall stability of lightweight profiles

The static operation of the building frame elements formed from thin-walled open profiles located in a monolithic foam concrete array is considered. This arrangement increases the overall stability and fire resistance of the floor beams.

The article considers a method for optimizing the composition of foam concrete based on determining the optimal water-solid ratio for the required average density of foam concrete. The concept of accurate calculation of the composition of light grade foam concrete by density, based on the implementation of experimental data and their complete computer processing, is proposed. At the same time, the properties of the components of the foam mixture and their influence on the quality of the finished product are most fully manifested. The concept is implemented using the Excel program in the Office Suite. In production conditions, thanks to this program, you can quickly work out the compositions of foam concrete of various densities. This is a good help for technologists and specialists of enterprises that produce commercial foam concrete and products made from it.

процесс электрохимической активации затворителя цементного раствора и определены его оптимальные параметры.