METHOD FOR MANUFACTURING MULTILAYER PANEL Russian patent published in 2001 - IPC

FIELD: construction engineering. SUBSTANCE: method is used for manufacturing heat-insulating structures with sandwich-type members in civil engineering and industrial buildings, for facing equipment, pipelines, for transport, fire-protection of structures, manufacturing fireproof ceilings, lifts, and safes. Made in advance are facing members for longitudinal beam of sheet material considering desired form of junction and billets of longitudinal bar of heat-resistant composite material. Heat-resistant composite material has following ingredients, mas.%: ash microspheres, 30-40; fluorsilicate sodium, 0.01-1.5; alkali metal salt, 0.6-1.8; oxygen-containing copper salt, 1.4-3.3; liquid glass, the balance. Prepared members are joint together in the course of hardening and for this purpose facing members are put into restricting mold whose profile corresponds to that of restricting members; mold is filled with liquid foam-silicate compound based on hollow ash microspheres which is used as fireproof filler and liquid glass, as binder of mentioned compound. Molding is effected under thermal treatment conditions at 300 C. Molded sandwich-members are assembled into multilayer panel. Junction points are filled either with liquid glass or foam-silicate compound said procedure is followed by material hardening. Assembled panel is bordered by contour reinforcement over perimeter. EFFECT: improved smoke and flame tightens; enhanced reliability of assembling and environment control characteristics; improved uniformity of panel. 5 cl, 2 ex, 1 tbl