METHOD TO PRODUCE POROUS FILLER Russian patent published in 2015 - IPC C04B20/06 C04B20/10 

FIELD: construction.

SUBSTANCE: in method of porous filler production providing for preparation of a ceramic casting slurry, submersion of filler particles into the slurry, their drying and annealing, the filler is unburnt haydite gravel of fraction 20-40 mm, drying is carried out to moisture of not more than 6%, annealing at temperature of 900-1100°C, besides, the slurry has the following composition, wt %: montmorillonite clay 35 or 40, water 45 or 50, quartz sand 5 or 10, dyeing additive 5 or 10.

EFFECT: production of light, strong and decorative porous filler.

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