FIELD: manufacture of building materials.
SUBSTANCE: invention concerns porous granulated heat-retention materials serving as especially light-weight filling material for industrial and civil-construction concretes. Raw mix for preparation thereof contains, wt %: microsilica 41.20, sodium hydroxide solution (45.22% Na2O) 21.38, waterproofness-imparting organosilicon liquid (concentration 26.2%) 0.21-0.62, and water - the balance.
EFFECT: reduced crude granule heat treatment time, lowered temperature of hydrothermal treatment of raw mix, reduced loose density and bulk water absorption, and increased porosity of granulated material.
2 cl, 2 tbl
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