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Foundation

August 12, 2017 18:06

Permanent formwork for the foundation - instruction

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Building technologies develop every day.They penetrate into all stages of the construction of buildings and, of course, did not escape his attention, and the scope of the construction of the foundation grounds.

The construction of each building after the preparation of the project begins with the construction of the foundation.Very often it is made with a wooden formwork, but modern technology allows the use of innovative methods and use of permanent formwork.What is it and how to build a foundation using a permanent shuttering their own hands?

Permanent formwork for the foundation

Fixed timbering for the foundation

Methods Construction of foundations using permanent formwork was invented and began to be implemented about 15 years ago.At the same time all the main stages of the construction of the foundations remain the same, the changes are only at the stage of formation of the formwork.Let us recall briefly how being built monolithic concrete strip foundation.

What you need to consider in the construction of the formwork for the foundation?

the beginning of each project is the foundation.Calculation of the foundation design is made on the basis of two main conditions - bearing capacity of the soil of your site and the severity of the building being erected.Depending on this calculated base area and grade of concrete used.

After settling of the foundation should be clearing the construction site and its layout.It is very hard work, because of its proper conduct depends on the geometry of the whole building being erected.

Classic concrete strip foundation is laid in the formwork, which, in turn, is placed in a trench dug in the ground.At the bottom of the trench stacked sequentially sand and crushed stone pillows.

And here begins the visible differences between the removable and permanent formwork.Removable formwork - it is rather complicated joinery construction consisting of a plurality of elements.In order to properly build it, you need to have solid technological skills.

But permanent formwork is going just as well-known children's designer "Lego".In addition, permanent formwork is not necessary to dismantle, as it plays in the foundation of another important role - it is an insulating layer.In the classical thermal insulation is necessary to lay further formwork - the next stages of work.When using permanent formwork you get "two in one", that is, and stop for a concrete solution and a layer of insulation.

Naturally, the use of permanent formwork does not relieve you of the need to build a reinforcing belt inside formwork.They are made of metal rods connected to a cell like.The bars in the crossing areas are welded to each other or connected by knitting wire.

The construction of permanent shuttering

design permanent formwork

As the advantages of permanent formwork can be noted that it absolutely does not absorb water.So you can be confident in maintaining correct proportions poured concrete solution.

As insulator some types of permanent formwork protected from fire, and they are extremely stable in a humid environment.

But it may be noted and disadvantages of this design.First of all - is the high cost.But at the same time, it is worth remembering that using permanent formwork you can save on heat-insulating layer.

Video - foundation using permanent formwork part 1

Video - construction of the foundation with the help of permanent shuttering part 2

types of permanent formwork

Designers have developed several types of permanent formwork.Let's see what you can provide the modern construction industry.

classic type of permanent shuttering are slabs of Styrofoam.Despite its lightness - they are quite strong, are excellent heat insulators and at the same time not prevent the required air circulation.

Plates made ​​of polystyrene foam

slabs of expanded polystyrene

The next type is the form of a mixture of wood chips and cement.This type of permanent formwork boasts excellent sound quality.To conserve heat in such plates are small air bubbles between the slivers of wood.Despite the fact that the design used is essentially short-lived tree - its special processing allows a stove for a long time to maintain its quality.In addition, this specially treated wood chips does not ignite and does not absorb moisture.

Fibrolite permanent formwork is a product of the chemical industry.It consists of magnesite, which is mixed with wood shavings.If magnesite replace Portland cement - such a plate is essentially repeats the previous design.This type of permanent formwork has an excellent resistance to fire, these boards serve as a reliable barrier to steam and keep warmth of your home.

Fibrolite permanent formwork

Fibrolite permanent formwork

construction technology with the use of permanent formwork

addition to the construction of foundations - permanent formwork is also widely used in the construction of walls.Moreover, in some cases, such use is basic.

So, in order to build a wall with the use of permanent formwork - it must be installed on hydroisolated foundation.Plates are fixed on the left protruding from the foundation reinforcement bars.These bars are the basis for the formation of the new series of reinforcing mesh with adjacent bars should be connected overlap.

When installing the first row of permanent formwork carefully vyverte future location of doorways and places abutting the interior walls.

Then gradually increase the grid of reinforcing bars and both permanent formwork wall.In fact, you are preparing the groundwork for the creation of a kind of sandwich - construction, where two layers of insulating material will restrict the concrete casting with a metal frame.

The process of pouring concrete in permanent formwork

pouring concrete in the process of permanent formwork

the same technology should be used when filling in the concrete solution of permanent formwork, which in the formation of any concrete casting.It is advisable to fill the entire volume at once.If this does not work, the concrete must be placed in layers.In any case, the raw concrete mass must be processed to prevent the occurrence of air column in its void.This can be done both with the help of specialized equipment - vibrators, and just pierce the concrete mass with a sharp object.

Frame permanent formwork

Framework permanent formwork

If you are building a concrete wall with a permanent shuttering, in the course of their construction also need to closely monitor the Place of utilities and forming the building structure elements.It is best to lay the place of their penetration and construction in advance, so you do not hammer away at a frozen concrete.

Concrete filled in permanent formwork - photo

Concrete bathed in permanent formwork - photo

If you buy high-quality, resilient blocks of permanent formwork, carefully prepare and fastening means securely established structure - the construction of the foundation or walls with permanent formwork can be quite affordable process.

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