Permanent formwork: what it is and how to apply?
Classical formwork for the foundation of a residential suburban home - no more than a temporary structureMade of boards or chipboard, less OSB.
But permanent formwork made of synthetic materials (primarily polystyrene foam) - a modern waste-free method of pouring the foundation and wall construction.
Permanent formwork - two sheets of polystyrene foam, connected to each other and forming a cavity into which the concrete is poured and fittings.
It looks as follows:
The most common form of foundations and houses of permanent formwork - a rectangle, but the technology allows to erect and pediments, and oval building (photo)
The main plus of permanent formwork of polystyrene foam - simultaneous warming of the wall and its "molding" (Styrofoam blocks make the wall smooth).
When erecting formwork use boards after hardening of concrete they will have to be dismantled. In addition, the tree does not insulate heat, and therefore blocks of polystyrene - a much better material.
However, there is in addition to the forms of polystyrene and plastic formwork. The price for it above, but higher strength and a casing.
The second advantage polystyrene foam forms - their ability to protect concrete from moisture. During the rainy season it is especially important.
The third advantage formwork of polystyrene foam is that it makes it possible to maintain the concrete structure and ensure its uniform freezing.
However, there is a concrete formwork of polystyrene foam and disadvantages:
- The building of such a construction is not subject to restructuring;
- it is necessary to lay all vnutristenovye communication in advance;
- Pouring concrete in the formwork can be at a temperature above 5 ° C;
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