HYDROPHOBIC GRANULATED FILLER FOR CONCRETE MIXTURE, COMPOSITION OF CONCRETE MIXTURE FOR OBTAINING DECORATIVE CONCRETE FACADE PRODUCTS, DECORATIVE CONCRETE FACADE PRODUCTS Russian patent published in 2018 - IPC C04B20/10 C04B28/04 C04B40/02 C04B111/20 C04B111/27 

FIELD: building.

SUBSTANCE: group of inventions refers to the production of building materials and can be used to produce decorative concrete facade products hardening with heat and moisture treatment. Hydrophobizing granular aggregate for the concrete mix is made in the form of granules of 0.16–2.5 mm in size, consisting of a core and a shell, where the core is obtained by rolling with agitation in a paddle mixer of finely ground diatomite by spraying with a mixture of 50 % aqueous sodium hydroxide solution and an aqueous solution of sodium silicate at the following diatomite ratio, sodium hydroxide and aqueous sodium silicate solution: 0.67–0.82:0.09–0.165:0.09–0.165, and the protective shell is formed on the wet surface of the core by dusting in a dry pulverized mixture of a white portland cement with a pigment in a paddle stirrer, and then screening out the resulting granules and their spraying with ethyl-silicate-40 at the following ratio of white portland cement, pigment and ethyl silicate-40: 0.75–0.85:0.01–0.07:0.14–0.18. Concrete mixture for the manufacture of decorative concrete facade products includes, by mass.%: said filler 10–40, white portland cement 20–25, quartz sand 28–48, superplasticizer Polyplast SP-1 0.07–0.17, inorganic pigment 0.5–1.5, fibrous fiber 0.1–0.15, water – the rest. Decorative concrete facade product made from the said concrete mixture.

EFFECT: increase frost resistance, compressive strength, stretching during bending and splitting.

3 cl, 1 tbl, 1 ex