METHOD FOR MANUFACTURING THREE-LAYER BUILDING ITEMS Russian patent published in 2001 - IPC

FIELD: construction engineering. SUBSTANCE: method involves consecutive laying of concrete mixes for constructive concretes and heat-insulating layers in form and their vibroforming. Vibration action is effected simultaneously from two opposite sides of item using plane waves applied at 85-95 deg. to opposite layer border from source of vibration action; relation between action forces is proportional to that of average widths of layers contacting vibration action sources. EFFECT: improved monolithic character of item due to improved bearing capacity of layers and item as a whole. 8 cl, 1 dwg