FIELD: manufacture of building materials. SUBSTANCE: filler is prepared largely from aleurite rock, in which process raw material is formed, dried, and baked. More precisely, raw material is clay recovery waste with predominant particle size 0.005-0.05 mm containing , wt % of oxide: silicon 58.55, titanium 0.95, aluminum 18.18, iron 7.78, manganese 0.07, calcium 0.98, magnesium 2.05, sodium 0.46, potassium 3.59, phosphorus 0.18, calcination loss 7.21. EFFECT: reduced loose density of claydite granules and increased resource of raw material. 1 tbl, 3 ex
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