HEAT-INSULATING CONCRETE Russian patent published in 2020 - IPC C04B28/04 C04B38/08 C04B111/20 

FIELD: construction.

SUBSTANCE: invention relates to construction materials and can be used in making articles in industrial and civil construction. Heat-insulating concrete is obtained from a mixture which contains, wt%: portland cement 41.00–42.00, sand with fineness modulus 2.1 12.40–12.80, foam glass fraction 0.63–2.5 mm with bulk density D=0.320 g/cm³ 19.40–19.60, microcalcite with a grain size of 100 microns a bulk density of D=1.145 g/cm³ 7.96–8.20, polycarboxylate polymer based on methacrylic acid ethyl ester with a bulk density D=0.55 g/cm³ and the hydrogen index value pH=5.5 0.28–0.30, chemical additive represented by an aqueous solution with density ρ=1.040 g/cm³ and a pH value of pH=6.5, consisting of an aqueous solution of a polycarboxylate polymer represented copolymer of allyl ether and maleic acid anhydride with a density ρ=1.025 g/cm³, pH value of pH=7.0, 50.2–51.9, silicic acid sol, based on nanodispersions of silicon hydrooxide with density ρ=1.02 g/cm³, pH value of pH=4.0, 41.6–42.2, sodium gluconate 3.9–4.2 and potassium hexacyanoferrate 2.6–3.4, 0.38–0.40, water 17.58–17.70.

EFFECT: creation of heat-insulating concrete with high compression strength and low value of heat conductivity coefficient.

1 cl, 1 ex, 2 tbl