BINDING AGENT BASED ON NEPHELINE SLAG FOR ROAD BUILDING Russian patent published in 2015 - IPC C04B28/04 C04B111/20 

FIELD: chemistry.

SUBSTANCE: binding agent based on nepheline slag contains: solidification activator and mineral additive, in accordance with invention as solidification activator it contains crushed with coarseness not more than 0.1 mm gypsum-containing wastes of aluminium production, and as mineral additive it contains dust of 4-5 fields of electric filters of sintering furnaces of alumina production with the following component ratio, wt %: nepheline slag 80-93, gypsum-containing wastes of aluminium production 5-15, dust of 4-5 fields of electric filters of sintering furnaces of alumina production 2-5.

EFFECT: increased frost resistance, acceleration of hardening and elongation of service term of road surface.

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