COMPOSITE MIXTURE FOR WINTER REPAIR OF ROAD SURFACES BASED ON ASH-SLAG MIXTURE Russian patent published in 2020 - IPC E01C7/10 

FIELD: construction.

SUBSTANCE: invention relates to the field of road construction, in particular to materials for repair of coatings in winter conditions, made on-site. Invention comprises composite mixture for winter repair of road surfaces. Composite mixture is suitable for repair works at air temperature up to minus 20 °C. Mixture is made directly in repair place by mixing of two components. First component is a solution of sodium liquid glass with density of 1.25–1.30 g/cm³, containing carbamide in amount of not less than 10 % by weight and sodium hydroxide in amount required to reduce liquid glass module to 2.0–2.1. Second component is a prepared dry composition of ash-slag mixture from boilers with liquid slag removal, ash-slag mixture from boilers with dry slag removal and Portland cement M400 in ratio 10:70:20 by weight. Deviation of components is not more than 2 % of total weight of mixture. Composite mixture after mixing of components with ratio of 3:1 is suitable for pouring into defective place of coating. After curing the composite mixture allows returning the road section into operation.

EFFECT: technical result is reduced time of repair of road surfaces in winter conditions, possibility of repairing at air temperature to minus 20 °C, high strength of repair material.

1 cl