METHOD OF PRODUCING POROUS AGGREGATE Russian patent published in 2015 - IPC C04B20/06 C04B20/10 

FIELD: chemistry.

SUBSTANCE: in a method of producing a porous aggregate, which includes preparation of a ceramic casting mixture, immersing aggregate particles into the mixture, drying said particles and firing, drying is carried out to moisture content of no more than 6%, firing is carried out at temperature of 850-1200°C and the aggregate used is natural vermiculite with particle size of 5-10 mm, wherein the mixture has the following composition, wt %: natural vermiculite 20-25, clay 24-30, water 45-50, colouring additive1-5. The method includes impregnating the porous aggregate with sodium ethyl siliconate or sodium methyl siliconate, followed by drying.

EFFECT: obtaining a light-weight, high-strength decorative porous aggregate.

2 cl, 3 ex