The article presents the coefficients of the constructive quality of fine-grained concrete and structural foam concrete with different percentages of micro-silica in the mixture.

The article presents testing results of non-autoclave structural and heat-insulating foam concrete, made on the basis of astringents of different grades and with different fillers. It has been experimentally established that the best filler for foam concrete is microsilica due to its high specific surface area and low bulk density in comparison with the sand. The use of high-quality binders in foam concrete mixtures allows to increase not only the strength of foam concrete, but also the content of microsilica up to 70% with respect to mixtures at lower brands of Portland cement.

Presents the results of testing foam concrete on different brands of binders and with different fillers.

Аннотация. В статье приведены результаты испытаний пенобетона неавтоклавного твердения с применением разных модифицирующих добавок.Ключевые слова: микрокремнезём, гиперпластификатор, пенобетон, модифицирующие добавки, жидкое стекло, клей поливинилацетатный.Abstract. The article presents the results of tests of foam concrete of non-autoclaved hardening using different modifying additives.

The phenomenon of the steric effect in cement mortar of a hardening matrix of foam concrete is considered. The amount of reduction in compressive strength in a matrix of foam concrete of heat-insulating grades by density.