Large -sized shields are made with a metal frame, which is framed along the contour by a channel No. 14 or No. 16. A strip steel is welded around the perimeter, the purpose of which is the same as the corner.
The frame is sheathed from below and on top with boards with a thickness of 40 mm, which form the upper and lower planes. Between them, only and insulation layer of mineral wool are laid between them. Such a cover of the cover and shutter is reliable and ensures the sealing of the camera.
Combined thermal processing of the flooring of the stand and the supply of acute steam transmitted under the shield with the required sealing should with a common cycle at 16 hours. and isothermal heating at least 12 hours. Provide the receipt of 60-70% of the design brand of concrete. Under these conditions, the circulation of cameras will be quite real and can be accepted when calculating the productivity of the landfill. The unsatisfactory execution of hydraulic or sandy shutters, the presence of significant dead spaces under the shield leads in practice to lengthen the thermal processing cycle and a decrease in technical and economic indicators.
It is necessary to carefully perform work on the device of a stand from the prefabricated multi -route panels, in which, instead of heating registers from gas pipes, channels are used. The parts used for this must be checked, the stoves laid should not have cracks and other defects that violate the tightness of the channels. The channels that supply steam and divert condensate should also be carefully executed. When these requirements are not fulfilled, a steam leak occurs, bringing its total consumption to 1.5 g per 1 m of the product, instead of normal 0.4-0.5 g, and the heat treatment cycle lengthens up to 4 days.
When building objects, mobile buildings are often needed: cabins, toilets, cabs for staff.
