Icf

Insulating Concrete Forms - permanent formwork made of granular EPS polystyrene ICF technology was first patented in the USA in the late 60s of the 20th century Over 40 years, fixed formwork made of expanded polystyrene evolves from small blocks of expanded polystyrene with a minimum volume for concrete, to building systems more reminiscent of a conventional removable formwork panel locks, harness, scaffolding, etc. - Content - 1 Classification - 2 Technology - 3 Finishing - 4 Positive qualities - 5 Negative qualities - 6 Prospects for development - Classification
There are several Only the types of formwork:
Solid blocks of expanded polystyrene with small recesses for filling with concrete - practically not produced
Solid blocks of expanded polystyrene with large recesses for filling in concrete are more reminiscent of panels connected by screed in expanded polystyrene - it is not recommended to use
Expanded polystyrene panels connected by locks with ties made of polyethylene or polypropylene. After pouring concrete, the ties are used to fasten the finish; drywall, siding, fastening elements are fastened to them. walls made of finishing bricks
Expanded polystyrene panels with integrated rigid elements made of polypropylene or polyethylene, the structural strength of the formwork is improved, the finish is simplified, with some deterioration of the thermal resistance
There are also variations of the 3rd type with integrated reinforcement elements - this somewhat worsens the flexibility construction 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 construction and operation and buildings, with a constant increase in the cost of the formwork itself - Technology
The technology of fixed formwork fully repeats the technology of removable formwork
1 Installation of formwork
2 Reinforcement with steel reinforcement, there are already options for reinforcing with fiberglass or using fiber-reinforced concrete
3 Fastening and leveling the formwork
4 Filling with mortar
Unlike conventional removable formwork, the formwork remains and works as a heat insulation material without any structural load! The fixed formwork does not bear!
Finishing
1 Polymer plaster what kind of polymer plaster is needed? 2 Drywall according to fire safety requirements 25mm 2 layers
3 Siding - mounted on embedded elements including wooden “lining” under “beam”
4 Decorative brick
Positive qualities
1 The pace of construction - and as a result the reduction in the cost of m²
2 Structural strength of buildings
3 Ease of decoration
4 Excellent energy-saving characteristics
5 Small wall area
6 Lightweight formwork - less risk of injury construction site
7 No need to store, re clean and maintain the formwork
8 Minimum debris output at the construction site - scraps of fixed formwork can be folded with bulk insulation or recycled
9 Architecture - buildings are cast from concrete, which in a liquid state can be imparted to almost any shape may require complex reinforcing elements Any project made of brick or aerated concrete, foam concrete, slag concrete, etc. can be adapted to the technology of fixed formwork, while the building area will significantly increase the usable area, since the thickness of we will have less
Negative qualities
1 In order to get 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 It should be noted that the building’s finishing speed is still higher than a building made of aerated concrete, there is also no need to insulate the building and mount a ventilated facade
2 When using formwork types 1 and 2 in the concrete wall, jumpers made of polystyrene foam remain, which significantly reduces the construction the strength of the building, the building’s ability to resist the spread of fire, and it’s also inconvenient during operation, it’s very difficult not to get into these jumpers. There are no 3-4 types of fixed formwork, there are no such qualities
3 The need for high-quality ventilation of the building
Prospects for development
The most promising is the third type of ICF, since it has no problems 1 and 2; low structural strength of the building; poor resistance to fire, and operational problems of the type are not as expensive as the fourth one


Icf

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