Silicate Brick Using Mineral Modifiers of Various Composition

The dynamic building materials market poses challenges to increase the competitiveness of piece goods. This also fully applies to autoclaved pressed materials, the quality assurance of which still requires efforts on the part of manufacturers. The aim of this work was a comprehensive assessment of the effect of a highly dispersed active mineral modifier based on natural raw materials of various genesis on the properties of silicate bricks. Silicate and aluminosilicate rocks of crystalline and amorphous structure (sand, granite, silica clay, perlite) are used as raw materials for obtaining a modifier. The regularities of the influence of the type and concentration of the modifier on the physical and mechanical characteristics of the molding mixture, raw brick and finished silicate brick have been established. It is shown that the mineral modifier, regardless of the raw material component, has a high activity in relation to CaO and a high adsorption capacity, which leads to an increase in the raw brick strength and density, a decrease in porosity and water absorption. Increase in strength and frost resistance. The boundary concentrations (optimal dosage) of the mineral modifier instead of sand were determined in the silicate mixture in terms of solid matter, which is 10–15% depending on the type of raw material used. The structural features of the samples are shown, which determine the formation of a strong consolidated composite: the addition of a mineral modifier, regardless of its composition, ensures the formation of a polymineral polymorphic structural composite with a developed structure of a newly formed substance, characterized by good adhesion to the aggregate.

V.V. NELUBOVA¹, Candidate of sciences (Engineering),
V.V. STROKOVA¹, Doctor of sciences (Engineering);
A.L. POPOV², Candidate of sciences (Engineering)

¹ Belgorod State Technological University named after V.G. Shoukhov (46, Kostyukova street, Belgorod, 308012, Russian Federation)
² North-Eastern Federal University in Yakutsk (42, Kulakovskogo Street, Yakutsk, 677007, Russian Federation)

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