GRANULAR NANO-STUCTURE-FORMING FILLER BASED ON HIGHLY SILICEOUS COMPONENTS FOR CONCRETE MIXTURE, COMPOSITION OF CONCRETE MIXTURE FOR OBTAINING CONCRETE BUILDING PRODUCTS AND CONCRETE BUILDING PRODUCT Russian patent published in 2013 - IPC C04B20/00 C04B28/04 B28B3/00 C04B111/20 

FIELD: chemistry.

SUBSTANCE: invention relates to industry of building materials and can be applied for obtaining concrete building products in industrial and civil construction. Granular nano-structure-forming filler based on highly siliceous components for concrete mixture, produced from silica-containing raw material, in form of granules with size 0.5-10 mm, which consist of core and formed on its surface protective coating from dry dust-like mixture of jointly milled quicklime and sodium silicofluoride with their weight ratio 0.85-0.95:0.05-0.15 with the following solidification to strength not less than 0.12 MPa, where core is obtained by granulation of silica-containing rock mixture, milled to passing through sieve with cell 0.315 mm, and swollen perlite sand with size of particles to 0.16 mm, in ratio 0.60-0.95:0.05-0.40 by weight, fastened by alkaline-containing binding agent, which consists of water solution of alkali metal hydroxide and Na silicate with density 1.2-1.3 g/cm³ (alkaline:silicate=0.85-0.95:0.05-0.15 by weight) in quantity 5-20% of mixture. Concrete mixture, which contains, wt %: said filler 20-50, cement 10-15, sand 25-50, water - the remaining part. Concrete building product, obtained from claimed mixture.

EFFECT: elimination of aggregation in the process of milling, reduction of density and heat-conductivity with increase and preservation of product strength, reduction of power consumption.

3 cl, 1 ex, 2 tbl