METHOD OF PRODUCING DRY CONCRETE FILLER AND AREA FOR PRODUCING DRY CONCRETE FILLER Russian patent published in 2013 - IPC C04B40/00 B28B15/00 

FIELD: chemistry.

SUBSTANCE: invention relates to production of concrete filler and the industry of building materials and can be used in producing concrete or mortar used in making concrete and reinforced concrete articles and structures for prefabricated and monolithic construction. The method of producing dry concrete filler involves separating the 0-40 fraction, re-grinding in a grinding apparatus the product of grinding the fraction larger than 20, and separating and dispersing the 0-20 fraction. Further, the product of grinding the 0-40 fraction is activated in two steps. The first activation step is carried out in a drying apparatus and the second step is carried out in a grinding apparatus: particles of the 2.5-40 fractions are cubed and particles of the 0-2.5 fractions are granulated. When separating the 0-20 fraction, along with known fractions 15-20; 10-15, the 3-10; 0-3 fraction is selected and the 0-3 fraction is dispersed on an air classifier with separation of the 1.25-3 fraction; along with known fractions 0.63-1.25; 0.31-0.63; 0.16-0.31, 0-0.16. An area for producing dry concrete filler using the disclosed method is also described.

EFFECT: obtaining high-quality dry concrete filler with high environmental friendliness of production.

2 cl, 1 dwg