METHOD OF PROCESSING PUZZOLANES Russian patent published in 2013 - IPC C04B20/00 C04B7/12 C04B18/10 C04B40/00 

FIELD: process engineering.

SUBSTANCE: invention may be used for making concrete mixes, mortars and other mixes containing cement. Method of processing puzzolanes including slag and flue ash such as Class F and/or Class C comprises subjecting puzzolanes to high-intensity grinding in appropriate grinders. Note here that low-density hollow particles as larger particles of slag get decomposed to activate surface of said particles to make finished product feature the following distribution of particles by sizes (in wt %): ≤5 micron - 15-25, ≤10 micron - 30-40, ≤30 micron - 90-95. Invention is developed in its subclaims.

EFFECT: higher activity of puzzolanes and strength of construction materials.

7 cl, 3 tbl