FIELD: construction.
SUBSTANCE: in method of finely dispersed amorphous silica production, including grinding of siliceous rock with further annealing, siliceous rock is represented by opal-cristobalite rock, which has been dried previously to moisture of 1-5%, ground down to particle size of 0-5 mm, annealing - with temperature of gases at the entrance to furnace of 650-1000°C, then - supply of annealed material with temperature of 70-90°C to activator mill with its grinding till specific surface of 200-4000 m2/kg.
EFFECT: provision of homogeneous product of annealing in composition, elimination of underburning and overburning of initial raw materials, improved strength of concrete and mortars, improved resistance to corrosion.
1 dwg
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Authors
Dates
2010-04-27—Published
2009-02-16—Filed