Icf

There are several types of formwork:

• Solid blocks of expanded polystyrene with small grooves for filling with concrete - practically not produced
• Solid polystyrene blocks with large grooves for filling with concrete in form more closely resemble panels connected with polystyrene foam ties - not recommended.
• Expanded polystyrene panels connected by locks (ties) made of polyethylene or polypropylene. After the concrete is poured, the screeds are used to fix the finish ( plasterboard , siding , fastening elements of the exterior brick wall are fastened to them).
• Expanded polystyrene panels with integrated rigid elements made of polypropylene or polyethylene improve the structural strength of the formwork, simplify the finish, with some deterioration in thermal resistance.

There are also variations of the 3rd type with integrated reinforcement elements - this somewhat worsens the flexibility of the building system with a possible increase in the pace of construction.

It should be noted that the evolving ICF system is constantly increasing the manufacturability of the construction and operation of buildings, with a constant increase in the cost of formwork itself.

The technology of fixed formwork completely repeats the technology of removable formwork.
1. Installation of formwork.
2. Reinforcement with steel reinforcement (there are already options for fiberglass reinforcement or the use of fiber concrete ).
3. Unfastening and leveling the formwork.
4. Pouring solution.
Unlike conventional removable formwork, the formwork remains and works as a heater (non-removable formwork does not carry any structural load!).

1. Polymer plaster (polymer plaster is necessary)
2. Drywall (fire safety requirements 25mm (2 layers))
3. Siding - mounted on embedded elements (including wooden "lining" under the "beam")
4. Decorative brick

1. The pace of construction - and as a result, a decrease in the cost of m².
2. Structural strength of buildings.
3. Easy finish.
4. Excellent energy saving performance.
5. Small area of ​​the walls.
6. Low weight of formwork - less injury at the construction site.
7. There is no need to store, transport and maintain formwork.
8. Minimum garbage yield at the construction site - trimming of permanent formwork can be folded with bulk insulation or recycled .
9. Architecture - buildings are cast from concrete, which in a liquid state can be given almost any shape (complex reinforcing elements may be necessary). Any project of brick or aerated concrete (foam concrete, cinder concrete, etc.) can be adapted to the technology of permanent formwork, while the building will significantly increase the useful area, since the wall thickness will be less.

1. To obtain a good pace of construction, it is necessary to use special. equipment (mixers, concrete pumps) when pouring "out of the bucket" the construction speed does not exceed the construction speed of aerated concrete . However, it should be noted that the speed of finishing the building is still higher than that of a building of aerated concrete, there is also no need to insulate the building and install a ventilated facade.
2. When using formwork type 1 and 2, the foam polystyrene lintels remain in the concrete wall, which significantly reduces the structural strength of the building, the building’s ability to resist the spread of fire, and is also inconvenient during operation (it is very difficult not to get into these lintels). In fixed formwork of 3-4 types, such qualities are absent.
3. The need for high-quality ventilation of the building.

The most promising is the third type of ICF, since it is not having problems 1 and 2 (the low structural strength of the building is poor fire resistance, and operational problems) of the type is not as expensive as the fourth.