METHOD FOR MANUFACTURE OF CURVED THREE-LAYERED WALL PANEL Russian patent published in 2002 - IPC

FIELD: construction, in particular, manufacture of products of prefabricated reinforced concrete. SUBSTANCE: method consists in successive placement of reinforcement rigging and flexible bracings of the aperture shaper (whenever necessary) and falsework board on a heated concave bottom, plate, feeding of concrete of the outer structural layer into the shaped cavity under the action of vibration during 60 to 90 s with and amplitude of vibrations within 0.3 to 1.8 mm, with a subsequent curing for 30 to 60 min. Then, the board is removed and the heat-insulating layer, reinforcement and concrete of the inner structural layer are laid, the outer surface is smoothed out, rubbed down. The panel is covered with a heat-insulating canopy, the panel is cured until it acquires the form dismantling strength at a temperature of 90 to 94 C under the canopy at a rate of heating of the outer and inner layers within 7 to 12 C/h and 3 to 10 C/h. Then the falsework is removed. EFFECT: enhanced quality of surface finish. 4 cl, 4 dwg