METHOD FOR MODIFYING CELLULOSE-CONTAINING LIGHTWEIGHT CONCRETE AGGREGATE Russian patent published in 2021 - IPC C04B18/24 C04B20/10 

FIELD: building materials.

SUBSTANCE: invention relates to the field of building materials, namely to the manufacture of structural and heat-insulating products and structures from lightweight concrete - wood concrete using plant waste, namely Sosnovsky hogweed, as a filler. A method for modifying a cellulose-containing lightweight concrete aggregate from plant raw materials based on Sosnovsky hogweed includes drying the stems of Sosnovsky hogweed to a moisture content of 2%, crushing them to a size of 0.01 - 5 mm, placing the crushed stems in a vacuum chamber and vacuuming at a vacuum from 0.133 to 0.266 bar in for 1 - 2 min, followed by treatment for 1 min with a liquid modifier in the form of an aqueous suspension containing, wt.%: fire retardant - ammonium polyphosphate 15.5, water-soluble organosilicon hydrophobizator "Aquasil" 1.3, dispersed intercalated graphite with particle sizes from 0.01 to 1 mm 6.2, water 77.

EFFECT: reduction of flammability and water absorption of cellulose-containing filler - Sosnovsky cow parsnip - while reducing the time of its processing, improvement of ecology and termination of contamination of fertile soils.

1 cl, 1 tbl, 2 ex