The technology of creating an armored belt on aerated concrete walls. How to make an armored belt in a house made of aerated concrete: all methods of manufacturing Correct armored belt for aerated concrete blocks

As a building masonry material, aerated concrete has gained popularity only in recent decades. Thanks to its unique physical and performance characteristics, this material has made significant adjustments to traditional construction technologies... These changes also apply to the arrangement of the rafter system.

1. The rafter legs can only rest on the armopoyas. In terms of its physical parameters, it must guarantee the strength and stability of the structure.
2. The reinforcing belt must be poured under all floors and ceilings. Neither reinforced concrete slabs nor floor beams can lie directly on the aerated concrete blocks.
3. It is strictly forbidden to fix the Mauerlat fastening studs or other load-bearing structural elements of the rafter system in the blocks. They can only be in the concrete tape.

Such stringent requirements are caused by the very low mechanical properties of aerated concrete blocks.

It is not worth dwelling on all the technical characteristics, only three of them affect the construction technology of the rafter system. Moreover, they are interconnected and cannot exist separately from each other. This refers to thermal conductivity, density and physical strength.

Low thermal conductivity is the main advantage of the material, especially nowadays when the cost of energy carriers is constantly increasing. Modern costs of maintaining structures in the winter period are large sums even for very wealthy compatriots. In this regard, foam blocks are considered the optimal masonry material for the construction of energy-efficient houses.

Only those materials with low thermal conductivity have low thermal conductivity. specific gravity... Air is considered the most effective heat insulator, the more it is, the less energy is lost. Accordingly, the more air chambers, the more effective heat saving, the better the masonry in this parameter.

But the more air, the lower the strength. As a result, foam blocks cannot withstand high mechanical loads, especially multidirectional shock loads. Among the existing masonry materials, the strength of aerated blocks is the lowest. All loaded structures must have a maximum abutment area, only in this way it is possible to reduce the point values ​​of the forces and increase the reliability and stability of buildings.

It is these links: low thermal conductivity - low weight - insufficient mechanical strength that require the mandatory use of a special reinforcing belt under the Mauerlat.

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Aerated concrete block

Two ways of filling the armopoyas

There are two perfectly different methods pouring a reinforcing belt, each of them has its own strengths and weaknesses.

The method of filling the armopoyas	Brief Description, Benefits and Challenges
	Along with ordinary blocks, the company produces special elements, including U-blocks. They have voids inside, into which concrete is poured for the reinforcing belt. These elements are used instead of traditional demountable formwork. The advantages of special blocks are that the process of manufacturing a reinforcing belt is much faster and easier. Disadvantages: it is necessary to work very carefully due to the fragility of the thin side walls, the width of the lower base of the armopoyas decreases. As for the cost of work, it is almost the same in all options. But taking into account the cost of lost time, special blocks are considered economically viable.
	The traditional method of making various concrete structures, not just armored belts. For formwork, planed boards with a thickness of at least 25 mm, strips, hardware and other materials are required to create a reliable structure. Formwork installation requires not only a lot of time, but also the special practical knowledge of the performers. After the hardening of the reinforcing belt, the wooden structure must be dismantled. These are all disadvantages, the only advantage traditional method- the effective width of the armopoyas increases. The final decision should be made by a professional architect based on the calculation of the maximum loads.

For the manufacture of an armored belt, construction reinforcement of a periodic profile with a diameter of 6–8 mm, soft iron wire and concrete are required.

Step-by-step instructions for installing a reinforcing belt

Initial data. Concrete is poured into special U-blocks, reinforcement from Ø6mm rods, galvanized steel pins are used for anchors. The manufacture of a reinforcing belt consists of several stages, each of which has a great influence on the final results.

Laying of special blocks for formwork

Step 1. Lift the U-Blocks onto the Facade Walls. To facilitate the work, it is recommended to immediately lay them out along the perimeter of the building, so then the laying is done much faster. Lift the blocks very carefully, remember that thin walls break off even with a slight blow.

Step 2. Start laying the last row of facade walls made of special blocks. The work is no different from the ordinary masonry algorithm, you constantly need to control the position of the blocks using a bubble level. The thickness of the solution is approximately one centimeter.

The solution should be prepared only from sifted sand; the presence of small stones in the mass is strictly prohibited.

If the whole block does not fit in a row, then it should be sawed off. This is done with a simple wood hacksaw with fine teeth.

Practical advice. Even before starting masonry work, you need to make the simplest devices for sawing off foam blocks.

Such a device greatly facilitates the process of adjusting the blocks to size. The cut is not only even, but always at right angles, which is very important when laying a wall.

Step 3. Replace the cut piece, if necessary, trim its planes and correct the dimensions.

Step 4. Connect the corner of the masonry under the armored belt. In this place, one block has a groove open to the outside; on the perpendicular side, on the contrary, it is closed. To correct the situation, you need to saw off the part of the block that covers the connection and insert it into the end of the wall.

In this way, lay out the entire row of blocks around the perimeter of the house, leave it for a day for the mortar to set.

There is no need to waste time while the wall is solidifying, start making a reinforcing belt from metal bars and fastening the studs in the blocks.

Rebar preparation

The standard length of the reinforcement is 6m; four rods are required to make the frame. Calculate the total footage and buy metal.

Step 1. Bend all the rods to a right angle in the middle of the length. Lift them to the house, approximately spread them around the perimeter of the building.

Step 2. Make the frames of the reinforcing belt, the side of the square is 10 × 10 cm. This value can be changed depending on the dimensions of the U-block.

Important. When determining the dimensions of the belt frame, it must be borne in mind that the rods from all sides must be poured with a layer of concrete at least two centimeters thick. If the reinforcement touches the walls of the block, then it does not reinforce the chord.

A frame made of reinforcement is easier to make if you use metal mesh cells with dimensions of 10 × 10 cm as a template. You need to cut out such cells, while leaving long ends at the corners. The armature is pressed against them and fixed with a wire.

Step 3. Place the reinforcement cage in the grooves of the blocks, check the position of the structure.

Using pieces of blocks or special plastic grips, make the necessary gaps on all sides, including the bottom.

If the length of the frame is not enough, then splic it with pieces of rods, you can fix the elements with ordinary plastic clamps.

Step 4. Install the metal studs for attaching the Mauerlat. It is recommended to use M16 studs, each about 33 cm long. But you can take an element with a smaller diameter, it all depends on the size of the roof and possible loads on the Mauerlat.

The length of the studs should take into account the following requirements:

• deepening into the gas block not less than 5 cm;
• the thickness of the armopoyas is at least 15cm;
• Mauerlat thickness 10-15cm;
• the height of the thread for the nut is approx. 3 cm.

Practical advice. When marking the installation locations of the studs, it is necessary to provide for the position rafter legs... The rafters should not rest on them, otherwise the wooden elements will have to be cut. This not only takes up extra time, but also negatively affects the stability of the structure.

Installation of studs is done in the following order.

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Electric drill

In the process of pouring concrete into the belt, it is necessary to constantly check the position of the studs.

Now comes the third stage of making a reinforcing belt.

Practical advice. If in the future it is planned to build a terrace near the house, then experienced craftsmen recommend immediately fixing metal studs in the reinforcing belt to fix it.

Drill holes in the blocks at a distance of about one meter, insert the studs into them, and screw the nuts from the concrete side. Always remember that no loaded elements can be fixed directly to aerated concrete blocks, and a concrete belt solves all problems.

Pouring with concrete

The mass can be produced independently in an electric concrete mixer. One part of the cement is given three parts of sand and four parts of crushed stone. The amount of water depends on the moisture content of the ingredients, but roughly corresponds to the amount of cement. If the load on the armopoyas is significant, it is recommended to increase the amount of cement by 20-25%.

Step 1. Prepare the concrete mix. To improve the quality, plasticizers can be added to it. They must be used according to the manufacturer's instructions.

Step 2. Gradually pour concrete over the reinforcement. Pay attention that the frame does not move and does not touch the planes of the block. If there is no electric vibrator, the compaction will have to be done manually. It is recommended to slightly move the reinforcement, due to such movements, the concrete adheres very tightly to the periodic profile and reliably holds it. And this is very important for any reinforced concrete structure, including an armored belt.

In order not to clog the thread of the studs, cover it with masking tape. It can then be easily removed; there is no need to clean the threads of adhered concrete.

Step 3. Before the concrete starts to harden, adjust the position of the studs with a bubble level. They must be in a strictly vertical position, if this condition is not observed, then big problems arise during the installation of the Mauerlat.

Step 4. Level the concrete surface with a trowel and under a level, the tape should be horizontal and as even as possible.

Important. You need to calculate your strength in such a way that the armopoyas is poured along the entire perimeter within one day. If you take a break, then the bearing capacity of the structure is significantly reduced.

You need to know that very liquid concrete shrinks a lot, the surface can sag and crack. The consistency of the mixture for the armopoyas should be the same as for pouring a shallow strip foundation.

It will take about 10-14 days for the concrete to harden; in hot weather, the surface of the armopoyas should be abundantly moistened and covered with plastic wrap. In houses made of foam blocks, it is recommended that a reinforced belt and Mauerlat be mounted not only under the rafter legs, but also around the entire perimeter. Due to it, the stability of the structure is significantly increased, it does not react so negatively to cyclic wind loads.

Video - Armopoyas for Mauerlat

Mauerlat is an element of the building's roofing system. The roof rafters are supported on this stable structure, which is located along the perimeter of the walls. Depending on the shape of the roof, you can attach the rafters different ways... you can find out all the subtleties and nuances of attaching the rafter legs, as well as familiarize yourself with the step-by-step technology.

What is an armopoyas on an aerated concrete wall? Types, advice on how to make it, taking into account the type of foundation and the range of wall materials. The purpose and nature of the interaction of this structural element with the wall of aerated blocks.

One of the advantages of aerated concrete wall blocks is the large size of the element. But this is fraught with the vulnerability of the masonry to uneven foundation settlements. In this case, not only the opening of the vertical seam can occur, but also the destruction of the blocks lying above. This is due to the fact that aerated concrete very poorly resists bending and tensile loads.

What is an armopoyas belt on aerated concrete for?

Reinforced belt on aerated concrete is an element of reinforcement of the solid wall. He, in turn, takes on the load arising from an uneven building. Usually masonry is made of piece blocks, connected with thin glue joints. The advantage of the reinforced belt is that it is made of monolithic concrete, which is reinforced with longitudinal and transverse reinforcement.

Concrete has a very high compressive strength. The reinforcement, in turn, works perfectly in tension. Reinforced concrete is able to withstand colossal bending loads that exceed the standard - without deformations. The wall above the armored belt experiences loads corresponding to minor belt deformations. Therefore, it does not crack or collapse. It's kind of powerful.

How is it done on lightweight concrete blocks

The device of a belt reinforced with reinforcement on the walls, in which a piece stone is bonded with a thick layer of mortar, is quite obvious. But the aerated concrete wall is placed on a thin adhesive layer. It is impossible to sink thick reinforcement into it. Therefore, an armored belt for aerated concrete is made in the form of a separate structural element that makes up a monolithic section of a wall made of blocks.
A problem arises with a significant difference in the heat transfer gradient between concrete and aerated block. Thanks to this, the monolithic belt will become not just a bridge, but a gate of coldness.

An important part of the armored belt on aerated concrete is on the outside. It reduces the width of the element. Aerated block manufacturers offer box-shaped elements. They are designed specifically for thermal insulation purposes, but traditional thermal insulation materials can be dispensed with, for example:

• sheet expanded polystyrene;
• polyurethane foam;
• hard basalt or stone wool.

The minimum thickness of the insulation should be ten centimeters, this is at the lowest thermal conductivity. Thus, the width of the belt will be equal to the thickness of the wall minus the insulation.

Where is solid wall reinforcement made of aerated concrete

The most critical sections of the wall in the dimensions of one floor are the first row of blocks and the last one. The elements of the floor or roof are laid on it. If you have decided on their device, then the aerated concrete wall must have at least two reinforced belts. As well as the construction of wall reinforcement - should be lighter. The height of the section of the belt is taken depending on its design and soil conditions.

Taking into account the load on the walls

Using standard box-shaped elements, the height of the belt will be equal to their depth. In other cases, it must be borne in mind that the greater the section height of the element, the greater bending loads it perceives without deformation. For example, the lower armored belt on aerated concrete along the belt prefabricated foundation can be made higher, twenty - thirty centimeters. The upper belt, which mainly distributes the loads from the elements of the floor or roof, may have minimum thickness, (sufficient for laying one layer of reinforcement).

If a monolithic reinforced concrete slab, a shallow foundation with upper and lower reinforcement, a reinforced concrete grillage of piles, or a monolithic tape with a reinforcing cage in the upper section are taken as the base for the aerated concrete box. That is, there is no need to arrange the lower belt of wall reinforcement. It is enough to reinforce the upper cut under the floor ceiling.

The device of a monolithic concrete beam that is not a solid contour, for example, in the middle section of a wall, broken, also makes no sense. In these places, it is necessary to carry out constructive reinforcement of the masonry using a mesh and special frames for laying in a thin layer of mortar, or by sinking the reinforcement into the slotted pipes of gas blocks. This reinforcement does not create a continuous belt. But at the same time, it significantly increases the resistance of the masonry to local loads and local deformations.

Armopoyas device on aerated concrete

The structure is made of concrete grade M-200 and above and reinforcing bars of a periodic profile, with a diameter of 12 millimeters. A frame is assembled from them, connected by transverse reinforcement with a diameter of 4-6 millimeters. The frame consists of an upper and a lower row of rods with a height gap of 10-15 centimeters. They are placed in the same plane, with a step in the transverse direction of about ten centimeters. The rods are overlapped along the length with a knitting wire with an overlap of about fifteen centimeters. They are also fastened to it, with elements of transverse reinforcement.

The belt can be made from one layer of reinforcement. This can be done without assembling the lattice girder, but only by connecting the longitudinal reinforcement bars with the transverse ones. At the points of rotation and fracture of the wall contour, the rods overlap and are connected at the intersection points.

Laying the frame in the formwork

The frame is placed in the formwork or the cavity of the box block. In this case, it is necessary to provide a gap between the outer face of any reinforcing element and the inner face of the cavity or formwork. It should be at least three to five centimeters. This is necessary to create which will prevent corrosion of the reinforcement. To facilitate this task, special plastic elements in the form of support tables and stars will help. They will allow you to fix the rods at the required distance from the formwork. They can be purchased from all suppliers selling concreting materials.

Install a reinforcing cage and, if necessary, a heat-insulating facade layer into the formwork. Next, you need to fill it with concrete, carefully tamping it. The use of the vibrator head is limited by the insignificant depth of the armored belt on aerated concrete. The required embedded parts can be installed in it. For example, for mounting a Mauerlat or a roof. Level the surface of the laid material using a rule and a trowel.

After the initial strength of the concrete has been achieved for two to three days, the work cycle can be continued. After about a week, the formwork can be removed. In hot weather, concrete is spilled with water several times and protected with polyethylene. When frozen, concrete is sheltered from freezing.

In a similar way, monolithic lintels are made over window and doorways, with the only difference that instead of the underlying layer of masonry, the bottom of the formwork is used, which is fixed in the design position.

The armopoyas device increases the strength of the bearing walls and the resistance of the entire structure to various loads: uneven shrinkage of soils and an object, wind effects, seismic vibrations and temperature extremes.

Armopoyas device photo

Formwork for armopoyas. Types and methods of the device

Armopoyas is a monolithic reinforced concrete structure. The belt has an annular contour, settles on the walls, and has no breaks (gaps) in its body. The solution to the question: how to make the armopoyas correctly begins with the formwork device. The most affordable formwork material is board. The formwork for the armopoyas is made either from separate boards, or from ready-made wooden panels, connected to each other from the outside by wooden scraps. From below, the boards are attached to the wall with self-tapping screws. On top, the opposite walls of the formwork are connected wooden ties(on nails). The step of the screeds is 80 cm, but not more than 100 cm.

DIY armopoyas

Performing an armored belt with your own hands, you can use another option for its creation, in which not wooden structures, but U-shaped blocks of aerated concrete serve as formwork. Trough blocks are laid with the same width as the wall, and have a cavity inside for laying the connected reinforcement cage and concrete. It is especially advantageous to arrange a belt with such a "formwork" along the outer walls, because the side walls of the U-shaped blocks perform the functions of insulation and exclude the formation of cold "bridges". The disadvantage of tray blocks is the high price.

How to make an armopoyas efficiently

Geometric and specifications monolithic structures are determined by calculation. Usually the width of the belt is equal to the width of the wall, 30-50cm. Since the support of the prefabricated or monolithic floor on the walls is only 120 cm (in practice - 150-200 cm), then based on this, the width of the belt can be taken as a smaller size. The recommended height of the armopoyas is 30cm.

In cottages where it is planned to create light floors, installation in a belt of a flat frame is allowed. The ladder frame is prepared directly on the wall, directly in the formwork. It consists of 2 rods (3 rods for a wide wall) of a periodic profile (diameter by calculation), interconnected by transverse rods. The pitch of the rods is 50 cm. The armopoyas under the floor slabs carries higher loads. Therefore, the frame is made three-dimensional from 4 or 6 longitudinal reinforcing bars and tied with transverse wire clamps.

Armopoyas on aerated concrete

The frame on all sides must have a protective layer of concrete 4-5 cm. From below it is laid on props made of brick or concrete chips. It should be noted that an armored belt is arranged on aerated concrete not only along the outer walls, but also along the load-bearing interior walls... And if along the length of the wall the transverse rods and clamps can be connected with a knitting wire, then at the corners of the structure and in the places where the frame branches to the internal load-bearing walls, the connection of the longitudinal reinforcement and transverse elements is performed by welding. The level frame is set strictly horizontally.

Armopoyas under the Mauerlat

When device roof structure roof, its bottom row - Mauerlat, is attached to the load-bearing wall with special anchors and pins. The rafter system itself creates a bursting load, which can lead to deformation of the walls. Armopoyas under the roof provides wall strength, stable rigidity of the roofing system. It will be performed in the same way as for the installation of a monolithic belt for overlap. Armopoyas under the Mauerlat serves both to distribute the load on the entire surface of the wall, and to lay fasteners in it for the Mauerlat itself.

How to fill the armopoyas

The task: how to fill the armopoyas is solved at the final stage of the device of a monolithic structure. For pouring, you can use ready-made commercial concrete mix of the M200 (B15) brand. Another option is making concrete at the construction site. Cement M400, sand and crushed stone, are taken in a ratio of 1: 3: 5. All components are loaded into a concrete mixer, water is added to the desired consistency and mixed. It is important that the concrete is poured into the formwork continuously and not in parts. To remove air bubbles from the mixture, after pouring the concrete mixture, vibrate or intensively pierce the concrete along the entire length of the belt with a piece of reinforcement.

Armopoyas for brick aerated concrete

In practice, as an option for strengthening wall structures, sometimes an armored belt is made for aerated concrete from bricks. It is a conventional solid brick masonry, reinforced with reinforcement. Reinforcement is carried out with a masonry mesh made of wire: 4-5mm through each row of masonry in height. The mortar is used cement-sand in a ratio of 1: 4. The height of a brick belt is taken from 20 cm to 40 cm. The width of the belt can correspond to the width of the wall, but maybe narrower. Of course, an armored belt made of bricks cannot be called equivalent in strength characteristics to a reinforced concrete belt. However, it is reliable when building houses in areas with low seismic activity or for the construction of auxiliary facilities and outbuildings.

Warming armopoyas

To prevent the reinforced belt from becoming a "bridge" of cold and in order to avoid the formation of condensation on it, it is necessary to insulate the armopoyas. Therefore, a monolithic or brick belt, most often, is performed not over the entire width of the wall, but with an indent from its outer edge. It is important to maintain the minimum width of the reinforced belt equal to 20 cm for concrete and 25 cm for bricks. The resulting longitudinal niches are filled with heat-insulating material, which are aerated concrete partition blocks laid on spoons (10 cm), expanded polystyrene plates and other materials.

Reinforced monolithic or brick belt gives building construction houses made of aerated concrete blocks with increased strength. And for all household members, he becomes the guarantor of a safe, long and happy stay in a new home.

For the construction of a house, various materials are used, which have their own functional characteristics. One of the options for building materials are aerated concrete blocks. The material has enough advantages, but at certain stages and places of laying it needs to be strengthened. An auxiliary element in the process is the construction of a reinforced concrete belt.

What is an armopoyas?

Is closed structural element buildings made of monolithic reinforced concrete, which exactly follows the contours of the building along the entire perimeter. It can be used both for load-bearing walls and for interior walls. The reinforcing belt has other names such as seismic and unloading.

What is it needed for?

• Increases the level of resistance of the walls of the building from harmful atmospheric influences.
• Aerated concrete blocks under pressure from the roof can undergo some degree of deformation from strong pressure on them, and the armored belt stiffens the entire structure.
• In cases of building a house on a site with loose soil or in a seismically hazardous area, the walls may crack from uneven shrinkage of the foundation. The unloading belt promotes uniform shrinkage.
• The blocks have a fragile structure and during the construction of the roof it is not recommended to fasten the timber to them with anchors, because the point load exceeds the stability indicators. A qualitative basis for this is an armored belt.

What is it?

The structural element of the building - armopoyas, is a metal frame (in the form of various geometric shapes- parallelepiped, square), filled with concrete or glue mixture. After the concrete has completely solidified, the structure becomes a monolithic formation with a base (aerated concrete blocks) and allows further construction work.

Methods for arranging an armored belt

1. The most common way of constructing a reinforcing belt is fixed directly to the walls of the building.
2. The formwork for the reinforced concrete belt can be special U-shaped aerated concrete forms, in which the process of constructing the frame and pouring concrete does not differ from the method using wooden planks. On the one hand, it is quick and convenient, but on the other hand, it is very expensive.
3. A reinforcing belt can be performed with the help, but using a reinforcing mesh as a rigid fastening.

Types of armopoyas

For each stage of the construction of a building, there is a type of reinforcing belt - it all depends on the need for their use:

• Foundation belt ().
• Basement belt (seismic).
• Interfloor belt.
• The main belt for the construction of the roof, for fastening.

Required materials and tools

Tools:

• Concrete mixer.
• Wooden boards and nails.
• Shovel - bayonet and "worm".
• Hand saw or electric jigsaw.
• Hammer.
• Welding machine and electrodes.
• Pliers.
• Building level.

Materials:

• Sand.
• Cement of the M400-500 brand.
• Elimination.
• Metal rods with a diameter of 10-12mm.
• Knitting wire (elastic).

Installation of armopoyas on aerated concrete

The construction of a reinforcing belt is not an easy process and requires certain skills. All parameters should be taken into account and the materials should be chosen correctly. It consists of several stages:

• Formwork construction.
• Reinforcement cage fabrication and installation.
• Pouring concrete.

Detailed step-by-step guide

Formwork construction

1. For the construction of wooden formwork you will need wooden planks of various widths, but with a thickness of at least 20mm, in order to prevent the possible bursting effect in knotty places. If possible, you can use wooden shields.
2. The lower part of the boards is attached directly to the aerated concrete blocks. Long nails (150-180mm) can be hammered through the boards or self-tapping screws can be tightened.
3. The following boards are fastened to the original base by connecting them together edged board from the outside along the length (perpendicular).
4. Identical joints of the boards occur from the outside and inside of the walls along the entire perimeter.
5. In the process of constructing the formwork, it is necessary to constantly check the level of the upper plane of the boards, because this is the boundary for the future concrete mixture. Differences in the plane relative to the zero mark from the level threaten with additional construction work.
6. To prevent the parallel planes of the wooden formwork from spreading in different directions from the concrete pressure during the pouring of concrete, jumpers are installed between them. The jumpers should have a pitch of 800-1000mm.

Manufacturing and installation of a reinforcing cage

1. It should be noted that the construction of the metal frame takes place directly in the formwork, because it is impossible to place the frame in assembled form due to the partitions and the significant weight of the structure itself.
2. So that the frame is in a "suspended" state and its elements do not adjoin aerated concrete blocks, the remains of bricks or other construction waste are placed under it.
3. The calculation of the side elements of the metal frame (stiffening rods) assumes an indent from the formwork of 50 mm on each side.
4. To start the process, two long metal rods are laid in parallel on the bottom of the formwork, and the constrictions (connectors) are welded between them. If a welding machine is not used, the joints are tightened with a bandage wire.
5. Bars are welded or tied perpendicularly to the created base "ladder". To create a full-fledged reinforcing "cage" - the upper part is attached to the rods in the same way with the lower version.
6. Along the entire length of the frame and especially at the corners of the building, reinforcement should be reinforced with additional adjoining rods. The more jumpers and additional elements in the frame, the better.

Pouring concrete into a metal frame

Before starting to pour the constructed frame - you need to make sure that the capacity of the concrete mixer, the amount of materials for concrete - are sufficient so that there are no gaps. After all, the main condition for creating a high-quality belt is the continuity of the supply (pouring) of concrete. If the process corresponds to the technology, cracks will never appear in the armored belt and the integrity of the structure is guaranteed.

Concrete components:

• Cement М400-500.
• Sand.
• Fractional screening (5 × 6 or 5 × 7mm).
• The ratio of the proportions is 1: 3: 5 and plus water in the required amount.

The prepared mortar is gradually poured into the formwork and to prevent the formation of "air cushions" on the surface it is necessary to walk hand tool- vibrating plate. With its help, the concrete mixture will penetrate into all parts of the formwork.

The poured concrete formwork cannot be dismantled in the first two days (natural bonding of the mixture). After the deadline has passed, dismantling is necessary, but it is impossible to start further work, because the final strength of the armored belt is reached 15-20 days after pouring.

Modern prices

• 1 running meter of a rod (12mm) - 80-100 rubles.
• Dressing wire (100m) - 250-300 rubles.
• Sand (1000kg) - 800 rubles.
• Screening (1000kg) - 1700 rubles.
• Cement (50kg) - 450-500 rubles.

In accordance with the current exchange rate of the ruble - prices may vary and prices are relative. It is also necessary to take into account that if the work is carried out by hiring specialized workers, it should be added to the general estimate for the procurement of materials - + 45-50% for their wages.

Dimensions / thickness of the armopoyas

In accordance with the established norms, the thickness of the belt corresponds to the width of the wall of the building being erected (30-60 cm). The height of the belt may vary, but builders recommend 25-35cm.

Changes in overall dimensions are quite acceptable, because buildings have different characteristics, and only an armored belt can guarantee the strength of the walls.

Aerated concrete without armopoyas

In 95%, it is not recommended to erect buildings without strengthening their walls with a reinforcing belt, because the service life is reduced significantly. At the slightest vibrations caused by soil shrinkage or natural phenomena, buildings are slightly deformed and crack in the walls (this is a draft).

What to replace?

Considering the fact that a reinforced concrete structure (armopoyas) is a rather expensive structural element when building a house, it can be replaced with a less cheap brick. As a rule, it is used which in the masonry process performs two functions - giving an aesthetic appearance and reinforcement of aerated concrete blocks.

How to replace?

Instead of a reinforced concrete structure, you can use brickwork. In this process, the quality of the brick does not matter, because in the future its surface will be refined - plastered.

Armopoyas is performed as usual, but with one addition - metal grid(0.5-07mm) fits between the rows. In this way, the possibility of the slightest movement (deformation) between the bricks is prevented. This method may be 70% equivalent to a real armored belt, but it will give confidence.

• It is not recommended to perform work of pouring a concrete layer at temperatures below -5-10 ° C.
• All work should be carried out by master builders, not "shabashniki".
• It is necessary to monitor the quality of materials and their compliance with GOST (provided by the manufacturer).

Conclusion

Building a house from aerated concrete blocks - ALWAYS must be equipped with an armored belt, and in some cases more than one. This belt will preserve the integrity of the building for a long time.

Armopoyas is a monolithic reinforced concrete structure that runs along the perimeter of the entire building in order to increase the resistance of the structure to external and internal loads. It can be shrinkage of the house, natural phenomena, interior decoration and much more, which causes deformation of the walls. Armopoyas for aerated concrete is usually installed between floors under the floor beams and directly under the roof, this is necessary so that the walls can withstand the weight of the roof and no cracks form.

It is considered mandatory when building a house from aerated concrete blocks, for several reasons:

• During the construction of the roof truss structure, anchors and studs are used to fasten the Mauerlat to the wall. This results in a point load, which the aerated concrete cannot withstand.
• If you lay the beams of the rafter system directly on aerated concrete, without creating a reinforced belt, this can lead to many problems. If the slightest deviation of the roof level occurs, cracks will appear.
• The seismic belt is a rigid frame that also distributes the load on the whole house evenly. This is important when hanging rafters are used in the rafter system.

In order for the structure to be strong and durable, the unloading belt must be done sequentially, while observing many rules.

Materials, tools, work sequence

To create such a device, you will need the following materials:

• Water.
• Gas blocks, for example.
• Boards.
• Armature.
• A rock.
• Concrete mix.
• Net.
• Shards of bricks or rubble.
• Insulation.
• Wall chasers, electric and manual.
• Cross-sections.
• Aerated concrete rigging.

The following tools will also be needed:

• Roulette.
• Self-tapping screws.
• Mallet.
• Anchor bolts or studs.
• Vibrating machine.
• Concrete mixer.
• Notched trowel.
• Level.
• Spacers, fasteners.

First you need to make an accurate calculation. Usually, the thickness of the seismic belt is equal to or narrower than the wall, and the height is 30 cm. Depending on the size of the house and the load, the diameter of the reinforcement and its required amount are calculated.

Formwork

To fill the structure with concrete, a removable formwork, most often it is made of boards, the thickness of which is 2 cm or more. U-blocks, bricks are also suitable, but we will focus on the classic version.

Reinforcement is placed and fastened into the formwork, which is poured with concrete mortar, it is easy to prepare it with your own hands using a concrete mixer, because a large amount of mortar will be needed.

To equip the formwork, they usually use knitting wire and spacers, which are made of wood 15 cm long. simple option formwork is considered a frame made of planks. They are spliced ​​together from the outside with pieces of wood. From above, the box must be connected with transverse ties so that it can withstand the concrete pouring and does not collapse. The lower part of the entire wooden structure must be screwed to the wall with self-tapping screws. As a result of all the work, a niche should remain, which is filled with insulation. This is necessary so that the loss of heat through the unloading belt is minimal.

Reinforcement cage

The frame is equipped in several ways: a couple of rods or four (then in section it will look like a square). You can calculate this based on what the load will be. If the building does not have heavy concrete floor blocks, then two rods may be sufficient. It is not recommended to use welding to fasten the reinforcement. It is best to tie it with a special wire directly in the formwork. You can do this in advance, but it will be problematic to lift such a structure in assembled form. The frame must be placed evenly, this is checked with a level. It is important that the reinforcement is at least 5 cm away from the walls of the formwork.

The correct filling of the unloading belt is of great importance, it is monolithic, so it must be filled in one go. Many people order ready-made concrete, but it must have a grade of at least M200. When making a mortar on your own, it is necessary to mix crushed stone, sand and cement, in a ratio of 5: 3: 1, and bring the mortar to the desired consistency by adding water, it is best to rent a concrete mixer.

The most important thing is that the concrete is poured only once, multiple layers cannot be poured. If it is not possible to prepare the required amount of solution immediately, then vertical cutoffs are set. When the next portion is ready for pouring, the partition is removed, and the junction must be abundantly wetted with water.

To remove voids that could have formed inside the mixture in the formwork, the bayonet method is usually used - pierce the solution with a piece of reinforcement several times. When everything is done, you need to wait 3-4 days and disassemble the formwork.

In order to quickly and efficiently create an armored belt, the main thing is to understand how to reinforce it correctly. Everything can be done within a few days, to a greater extent it depends on the professionalism and the number of workers. Reinforcement of walls from aerated concrete blocks is sometimes mandatory; without a monolithic belt, a structure can quickly collapse.

Armopoyas in a house made of aerated concrete, bricks (other block materials) during construction serves as additional protection of walls and other supporting structures from deformation and movements. In other words, this belt is nothing more than a reinforced concrete structure designed to strengthen the walls and foundations of a house from various loads that arise under the influence of both external and internal factors. External factors include the impact of wind, ground movements, features of the site's topography and, of course, the seismic activity of the earth. Internal factors include the redistribution of the load from the bearing elements, the connection of the columnar elements (foundation), the installation of additional fasteners and structures.

For a more detailed study of the issue, we will consider the process of installing an armored belt using the example of a house made of aerated concrete. However, this technology is applicable to other types of houses, where the walls can be made of bricks, expanded clay blocks and any other block materials. But, first of all, let us determine the factors acting on the walls and figure out why an armored belt is needed in this or that case.

Why do you need an armopoyas in the house

To understand the principle of operation of a reinforcing protective structure, we will consider it within the framework of building a house. Any stone or block material works better in compression than in tension. Tensile and torsional loads can arise both as a result of building settlement, when soil heaving at the foundation, and for other reasons. It can also be caused by an incorrect calculation of the bearing capacity, as a result of which the walls in various sections will receive both compressive and more critical tensile loads. These masonry sections may not be structurally ready for them. As a result, the walls will crack. By adding reinforcement with concrete at the top of the masonry between floors, we will additionally protect the walls from destruction.

Take, for example, a house made of aerated concrete and consider a diagram. In the lower part, it is almost always performed, which is still the same protective belt. Correctly performed warping copes well with the loads, so there should be no problems at this level. Using an interfloor armored belt, we add reinforcement to the structure that can cope with stresses. In this case, the wall itself becomes more rigid and conditionally works like an I-beam. The monolithic belt also resists lateral loads from the wind and bursting loads from the roof many times better. In the sum of all these properties, the seismic resistance of the house also increases, which is a mandatory requirement for any residential building in earthquake-prone areas. We considered a multi-storey scheme, however, the armopoyas is also applicable in a one-story house with or without an attic. In this case, in conjunction with the foundation, a belt for the Mauerlat is used.

Armopoyas also redistributes point loads well. This is especially important for materials that are not ready to work with local point loads - these are gas silicate blocks and other similar materials. Therefore, in a house made of aerated concrete, it is imperative to perform reinforcement for reinforced concrete floor slabs. A similar principle of redistribution of loads and wooden base for rafter legs. But, at the same time, in order to qualitatively fix the Mauerlat to a structurally weak wall, an armored belt is needed. The under-roof belt will increase both the structural rigidity of the walls, and will also allow solving the issues of fastening the roof structures.

Calculation of a reinforced belt

Armopoyas - the main stages of manufacturing

Rebar frame

The assembly of the frame begins with the installation of the reinforcement on upper part walls. When laying, it is necessary that it subsequently be recessed in concrete at least 40 mm from the outer boundaries of the monolithic belt. Working with aerated concrete, for convenience, you can drive control pieces of reinforcement into it. And already to the segments, attach the frame with a given indent from the top of the masonry. To tie the reinforcement together, you need a soft knitting wire. To set the dimensions of the frame, it is recommended to create a square of four pins or bend from a solid rod (cross clamp). These clamps are primarily attached to the sections driven into the wall at regular intervals - usually 250-300 mm... If you do not drive in the control pins, then special pads will be required - clamps to raise the frame itself. Therefore, consider the appropriateness of this or that method. Having completed this work, we turn to the reinforcement fasteners.

The lower row of longitudinal reinforcement is wound into frames - clamps and connected with wire. The top row is attached in the same way (the longitudinal reinforcement should be inside the clamp). As discussed above, the required minimum is two fittings at the bottom and two at the top. For additional rigidity, the number of reinforcement and the configuration of the frame can be changed. Naturally, this will affect material costs. But if it is necessary, you should not neglect the calculation. We also note that the length of the segments or solid squares (transverse clamps) is related to the thickness of the armored belt. For example, the thickness of the belt is 300 millimeters, then the dimensions of the transverse clamps are 220X220 millimeters (taking into account that the height of the belt is also 300 millimeters). That is, we leave indents from the edges of at least 40 millimeters.

Formwork

Consider the formwork. What options for installing a monolithic belt in a private house can be:

• Using factory-made or home-made U-blocks as formwork.
• Formwork from.

U-blocks made of aerated concrete are used as permanent formwork for the installation of reinforced monolithic lintels overlapping openings in walls and partitions, as well as for the installation of monolithic reinforced strapping belts that impart spatial rigidity to the entire building and redistribute the load from the floors. U-shaped blocks are elements of non-removable formwork for reinforced concrete. The diameter of the reinforcement and the class of concrete for filling the U-block are selected by calculation, depending on the perceived load. When choosing these elements as formwork, consider the method of insulating the concrete tape. It is advisable to insulate the block from the outside, but if this is impossible in certain cases, lay the insulation inside (given the internal factory dimensions, this is not the best option).

With a possible thickness of the outer wall of 375-400 millimeters, it can have the following structure:

• Outside - a block with a thickness of 100-150 mm.
• Further in order - we insulate the armopoyas to cut off the cold bridge. Instead of extruded polystyrene foam with a thickness of 50-100 mm, you can use high-density mineral wool, which is used in the "wet facade" technology.
• Reinforcing frame.
• On the inner side of the wall, blocks with a thickness of 50-100 millimeters are used as permanent formwork. The remaining space is filled with concrete.

The advantages of this type of formwork include the speed of its installation. To strengthen the structure, you can additionally use screeds from bars or reinforcement connecting the indoor and outdoor unit.

It performs several functions: it gives shape to concrete, protects it from spreading and subsequently serves as an excellent insulation.

The advantages of this formwork method:

• Ease of formwork assembly. Ready-made blocks, including corner joints, are produced.
• High speed of installation.
• It makes it easier to lay the reinforcement, because there are special grooves for it.
• It is easier to control the dimensions of the concrete tape.
• The concrete will harden in the formwork, which will protect it from rapid drying, sudden changes in temperature.
• Extruded polystyrene foam is a waterproofing material.

It might seem like this technology is very expensive. But if we take into account the cost of insulation, the cost of assembling and dismantling conventional wooden formwork, then the difference becomes insignificant. Alternatively, you can make this formwork not from factory blocks, but yourself from expanded polystyrene. But that would be a more time consuming option.

For an armored belt in an aerated concrete house, it is the most laborious to manufacture. At the first stage, you need to make shields from the boards. To do this, put them together and connect them together using wooden blocks and nails.

At the second stage, ready-made shields are installed along the perimeter of the future reinforced belt. The concrete solution will create pressure on the walls of the formwork, therefore, in order for the formwork not to move apart, it is imperative to fasten the entire structure with clamps.

Pouring with concrete

In general, this stage should not cause difficulties. The only inconvenience is the delivery of concrete to the very top of the wall. The quality of the concrete must not be lower. At self-production mortar using cement M-500 will help the following proportion - a bucket of cement / three buckets of sand / five buckets of rubble... It is recommended to use thick concrete - so it does not press hard on the formwork. It should not be forgotten that the concrete must be properly compacted. After pouring concrete, cover it with foil. Thus, you will reduce moisture evaporation. It usually takes about two days for the concrete to fully set, after which the formwork can be removed (provided that it is collapsible).

Video: armopoyas in aerated concrete house

This video demonstrates the device of a Mauerlat reinforced belt on aerated concrete walls. In this case, the formwork is made of board panels. When viewing, pay Special attention reinforcement connections at corners. It is better to additionally tie the studs for fastening the roof to the frame reinforcement and not waste energy on useless reinforcement in a fragile gas silicate block.

As a conclusion, we note that the armopoyas in the house made of aerated concrete and any other block material is waterproofed before further stages of work. It is up to you to decide whether it is expedient or not. Naturally, considering the foundation belt, it must in any case be covered with insulation, since there is moistened soil nearby. With belts above the foundation, with the right device walls, concrete moisture should not be. But nevertheless, it will not be superfluous to separate the Mauerlat belt with waterproofing from the wooden structures of the rafter system.

Aerated concrete is a warm, inexpensive and easy-to-install material. That is why it is considered a very good alternative to brick. However, in terms of strength, blocks made of such a material, the latter, unfortunately, are significantly inferior. Therefore, the laying of walls from this material has some of its own nuances. Firstly, it must be done in a very a solid foundation, secondly, during construction, the evenness of the structure should be carefully checked. The third condition for the reliability of aerated concrete walls is a device from above along the entire perimeter of a reinforced concrete armored belt. We will talk about it in this article.

Purpose of the structure

An armored belt for aerated concrete is poured specifically to prevent cracking of the walls under the pressure of the roof. In addition, this design is used for more reliable fastening of the Mauerlat. One of the disadvantages of aerated concrete is that it does not hold fasteners very well. Of course, you should arrange an armored belt, strictly adhering to the prescribed technology.

Device methods

You can make an armopoyas for walls made of aerated concrete correctly and with your own hands in two ways - using wooden formwork or special additional blocks. The first filling option is more complicated technologically. The construction device using blocks is a very simple procedure, but it will cost more.

How to make an armored belt using formwork?

With this method of constructing a reinforcing structure, the following materials will need to be prepared:

Material	Specifications	What is it needed for
Edged board	Minimum 2.5cm thick	Formwork manufacturing
Beams	40x40mm	Formwork manufacturing
Nails		Fastening boards to the wall
Wire	Flexible	For stiffening the formwork structure
Expanded polystyrene	20mm	Warming armopoyas

From tools you will need a drill and a hacksaw

The height of the armopoyas is usually 40 cm. Therefore, each side of the formwork will have to be knocked down from two boards 20 cm wide. Thick plywood can also be used instead of boards.

Important: It is necessary to install the formwork immediately along the entire perimeter of the wall. There should be no horizontal joints in the concrete.

They fasten the formwork panels to the walls with self-tapping screws, or simply nail the elements with long nails. From above between the shields, spacers from a 40x40 bar are installed, spacers of the same length are cut out, equal to the width of the armopoyas. They are installed between the boards with a step of 1.5 meters. In order for the armored belt on aerated concrete to turn out to be absolutely even, the structure should be stiffened. To do this, the opposite bars holding the shields together (they should protrude about 20 cm above the surface) are intercepted with a wire and twisted with an iron rod, tightly pressing the walls against the spacers.

Tip: From the inside of the house, the formwork board (from the inside) can be laid with sheets of expanded polystyrene. Concrete has a much higher degree of thermal conductivity than aerated concrete and therefore, without insulation, the armopoyas will become a cold bridge, which will worsen the operational characteristics of the building. After pouring the armored belt and removing the formwork shield, the expanded polystyrene can be fixed to the concrete with dowels, "fungi" or in some other way.

Fill

An armored belt is being arranged for a building made of aerated concrete with its obligatory reinforcement. To make the structure more reliable, a 12mm rod is used. The frame from it is tied with a knitting wire. Welding is not allowed, as the metal inside the concrete will quickly begin to rust.

The frame is installed inside the formwork on 30mm blocks or special plastic supports. The filling itself must be done in one go. If this cannot be done, a layer is pre-poured along the entire perimeter of the formwork without interruption. The next one will need to be filled no later than 12 hours later.

Armo-belt device using blocks

With this installation of the armopoyas, everything is extremely simple. The blocks are installed on the walls in the usual manner. Further, their central empty part is reinforced and also poured with concrete.

Well, we hope that now you understand how to make an armored belt for aerated concrete. This design is mandatory for houses of this type. Filling it, as you can see, is not difficult, while the walls will turn out to be much more reliable and durable.

Video on the topic "How to make an armopoyas on aerated concrete with your own hands":

Remove from wooden barrel steel hoops and it will fall apart. Remove the reinforced belt from the house and the building will not stand for a long time. This is a simplified but very visual explanation of the need to strengthen the walls. Anyone who is going to build a solid house will find useful information about the purpose, types and device of armored belts.

What is this structure and what functions does it perform? Armopoyas is a tape made of monolithic reinforced concrete, which is laid on several levels of a building under construction.

The filling of the reinforced belt is carried out in the foundation, under the floor slabs and under the Mauerlats (support beams of the rafters).

This amplification method performs four important functions:

1. Increases the spatial rigidity of the building.
2. Protects the foundation and walls from cracks caused by uneven settlement and frost heaving of the soil.
3. Prevents heavy floor slabs from pushing through fragile gas and foam concrete.
4. Reliably connects the roof truss system to the lightweight block walls.

The main material for increasing the rigidity of the walls was and remains reinforced concrete. For small outbuildings, you can use a less powerful brick armored belt. It consists of 4-5 rows of brickwork, the width of which is equal to the width of the bearing wall. In the seam of each row, a grid with a cell of 30-40 mm made of steel wire with a diameter of 4-5 mm is laid on the mortar.

In what cases is an armopoyas needed?

For walls

Strengthening the walls with a reinforced belt is not always required. Therefore, you do not need to waste money on its device in the following cases:

• solid soil (rocky, coarse or coarse sand, not saturated with water) lies under the base of the foundation;
• walls are built of bricks;
• under construction cottage which is covered with wooden beams rather than reinforced concrete panels.

If the site contains weak soils (dusty sand, loam, clay, loess, peat), then the answer to the question of whether a reinforcing belt is needed is obvious. You cannot do without it in the case when the walls are built from expanded clay or cellular blocks (foam or aerated concrete).

These are fragile materials. They do not withstand ground movements and point loads from floor slabs. Armopoyas eliminates the risk of wall deformation and evenly distributes the load from the slabs to the blocks.

For (the wall thickness is not less than 30 cm, and the strength grade is not lower than B2.5), an armored belt is not needed.

For Mauerlat

The wooden beam on which the rafters rest is called the mauerlat. It cannot push through the foam block, so it may seem to someone that an armored belt is not needed for it. However, the correct answer to this question depends on the material from which the house is built. Mounting a Mauerlat without an armored belt is allowed for brick walls. They securely hold the anchors with which the Mauerlat is attached to them.

If we are dealing with light blocks, then the armopoyas will have to be poured. B, and the anchors cannot be securely fixed. Therefore, a very strong wind can tear the Mauerlat away from the wall along with the roof.

For the foundation

Here the approach to the problem of amplification does not change. If the foundation is mounted from FBS blocks, then the armopoyas is definitely necessary. Moreover, it must be done in two levels: at the level of the sole (base) of the foundation and at its upper cut. This solution will protect the structure from intense loads arising from the rise and settlement of the soil.

For rubble concrete strip foundations, reinforcement with a reinforced belt is also required, at least at the level of the sole. Rubble concrete is an economical material, but not resistant to ground movements; therefore, it needs reinforcement. But the monolithic "tape" does not need an armored belt, since its basis is a steel volumetric frame.

There is no need for a device of this structure for a solid foundation slab, which is poured under buildings on soft soils.

For what types of interfloor floors do you need an armopoyas?

Under panels that rely on expanded clay concrete blocks, gas or foam concrete, a reinforced belt must be done without fail.

It is not necessary to pour it under a monolithic reinforced concrete floor, since it evenly transfers the load to the walls and firmly binds them into a single spatial structure.

Armopoyas under wooden floor, which rests on light blocks (aerated concrete, expanded clay, foam concrete) is not required. In this case, it will be enough to fill the support platforms made of concrete with a thickness of 4-6 cm under the beams in order to exclude the risk of pushing the blocks.

Someone may object to us, pointing out a number of cases when the armopoyas under the wooden floor of the floor is poured. However, in this case, amplification is required not because wooden beams on concrete cushions they are able to push through the masonry, and to increase the spatial rigidity of the building boxes.

How to make an armopoyas correctly?

The technology for the device of a reinforced stiffening belt is no different from the method of pouring a monolithic foundation.

In general, it consists of three operations:

• Reinforcement cage manufacturing;
• Formwork installation;
• Pouring with concrete.

Certain subtleties and nuances in the work appear depending on the location of the armopoyas.

Reinforced belt for foundation

Answering the question of how to make a reinforced belt under the foundation (level 1), let's say that its width should be 30-40 cm more than the width of the supporting part of the main concrete "tape". This will significantly reduce the building's ground pressure. Depending on the number of storeys of the house, the thickness of such a stiffening belt can be from 40 to 50 cm.

The reinforced belt of the first level is made for all load-bearing walls of the building, and not just for the outer ones. The frame for it is made by knitting reinforcement clamps. Welding is used only for preliminary connection (tacking) of the main reinforcement into a general spatial structure.

Armoias of the second level (on the foundation)

This design is essentially a continuation of the strip foundation (rubble concrete, block). To reinforce it, it is enough to use 4 rods with a diameter of 14-18 mm, tying them with clamps with a diameter of 6-8 mm.

If the main foundation is, then there are no problems with installing the formwork under the armopoyas. To do this, you need to leave free space in it (20-30 cm) for installing the reinforcing cage, taking into account the protective layer of concrete (3-4 cm).

The situation is more complicated, since no formwork is placed for them. In this case, wooden spacers should be used, which support the formwork panels from below. Before installation on the boards, trim boards are stuffed, which protrude beyond the dimensions of the formwork by 20-30 cm and do not allow the structure to move to the right or left. To connect the formwork panels, short cross-beams are nailed along the top of the boards.

The fastening system can be simplified by using threaded rods. They are put in pairs in the formwork panels at a distance of 50-60 cm. Having tightened the studs with nuts, we get a sufficiently strong and stable structure for pouring concrete without wooden supports and crossbars.

This system is also suitable for formwork, which requires an armored belt for floor slabs.

Studs, which will be filled with concrete, need to be wrapped in glassine or a little machine oil should be applied to them. This will facilitate the task of removing them from the concrete after it has hardened.

Armopoyas for floor slabs

Ideally, its width should be equal to the width of the wall. This can be done in the case when the facade will be completely revetted with slab insulation. If it is decided to use only plaster solution for decoration, then the width of the armopoyas will have to be reduced by 4-5 centimeters in order to leave room for foam or mineral wool. Otherwise, in the zone of laying the stiffening belt, a through bridge of cold will appear of a very solid size.

Making an armored belt on aerated concrete, you can use another solution. It consists in installing two thin blocks along the edges of the masonry. A steel frame is placed in the space between them and concrete is poured. The blocks act as formwork and insulate the belt.

If the thickness of the aerated concrete wall is 40 cm, then for this purpose, partition blocks 10 cm thick can be used.

With a smaller wall thickness, you can cut out a cavity for an armored belt in a standard masonry block with your own hands or buy a ready-made aerated concrete U-block.

Reinforced belt under the Mauerlat

The main feature that distinguishes the armo-belt under the Mauerlat from other types of reinforcement is the presence of anchor pins in it. With their help, the timber is firmly fixed to the wall without the risk of tearing off or shifting under the influence of wind loads.

The width and height of the reinforcing cage must be such that, after the structure has been embeddable, at least 3-4 cm of a protective layer of concrete remains between the metal and the outer surface of the belt on all sides.

If the house is built from block materials, then it is often exposed to natural influences. In particular, the building settles, the soil swells around it, etc. Well, strong winds and long showers negatively affect the integrity of the structure. To protect against such influences, a do-it-yourself armopoyas made of concrete is created on top of the walls. In our article I would like to talk about the manufacturing technology of the reinforcing belt, as well as its purpose.

The purpose and design of the armopoyas

Reinforcing belt (seismic belt) - increases the reliability of the house and prevents cracks. They, in turn, are formed when the ground moves or is exposed to atmospheric precipitation. Such an element helps to evenly distribute the loads from heavy structures located above it.

For example, concrete floors are laid just on top of a reinforcing belt. Many are mistaken in thinking that wooden floors do not need to be. This is far from the case - this element is needed to close the walls of any house. In this case, the type of overlap is irrelevant. After all, as you know, houses are built for long centuries, and not for a short time.

Armopoyas device: stages of work and their features