ASH MINERAL MIX FOR ASH GRAVEL Russian patent published in 2011 - IPC C04B14/04 C04B18/04 

FIELD: construction.

SUBSTANCE: ash mineral mix for ash gravel contains, wt %: sand with fraction of up to 3 mm 10-15, ash from burning of waste water residue with specified surface of 200-300 m²/kg, apparent density of 0.7-0.8 m³, content of SiO₂ 50-60% and pH 12-13.5 60-65, portland cement of not less than 400 9-12, oil road bitumen 8-10; water 10-15 of mix weight.

EFFECT: wider base of raw materials for manufacturing of construction ash materials by application of ash from burning of waste water residue provided that specified ash utilisation volumes increase, improved environmental condition by reduction of stored ash volumes on landfill and usage of this ash to manufacture ash gravel, and reduced level of heavy metal salts leaching into environment.

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