Such an armored belt is used for the construction of aerated concrete walls. Reinforcing brick belt

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

What is an armored belt?

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

What is it needed for?

• Increases the level of resistance of building walls from harmful atmospheric influences.
• Aerated concrete blocks under the pressure of the roof can be subject to some degree of deformation from strong pressure on them, and the armored belt gives rigidity to the entire structure.
• If a house is built on a site with loose soil or in a seismic zone, the walls may crack due to uneven shrinkage of the foundation. The unloading belt promotes uniform shrinkage.
• The blocks have a fragile structure and it is not recommended to attach beams to them with anchors when installing the roof, because the point load exceeds the stability indicators. A high-quality basis for this is an armored belt.

What does it represent?

The structural element of the building, the armored belt, is a metal frame (in the shape of various geometric shapes- parallelepiped, square), filled with concrete or adhesive mixture. After the concrete has completely hardened, the structure becomes a monolithic formation with a base (aerated concrete blocks) and allows further construction work to be carried out.

Methods for constructing an armored belt

1. The most common way to construct a reinforcing belt is to attach it directly to the walls of the building.
2. The formwork for a reinforced concrete belt can be special U-shaped aerated concrete forms, in which the process of constructing a frame and pouring concrete is no different from the method using wooden boards. On the one hand, it is fast and convenient, but on the other, it is very expensive.
3. The reinforcing belt can also be made using, but using as a rigid fastening, a reinforcing mesh.

Types of armored belt

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

• Foundation belt ().
• Base belt (seismic).
• Interfloor belt.
• The main belt for roof construction, 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 grade M400-500.
• Dropout
• Metal rods with a diameter of 10-12mm.
• Wire for knitting (elastic).

Installation of armored belt on aerated concrete

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

• Construction of formwork.
• Manufacturing and installation of reinforcement frame.
• Pouring concrete.

Detailed step-by-step guide

Construction of formwork

1. For construction wooden formwork You will need wooden boards of various widths, but with a thickness of at least 20mm, in order to prevent the possible effect of bursting 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. You can drive long nails (150-180mm) through the boards or tighten self-tapping screws.
3. The following boards are fastened to the original base by connecting them together with an edged board from the outside along the length (perpendicularly).
4. Identical board connections occur on the outer and inner sides of the walls along the entire perimeter.
5. During the construction of 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 level from the level threaten additional construction work.
6. To ensure that the parallel planes of the wooden formwork do not creep apart during the pouring of concrete different sides from concrete pressure - jumpers are installed between them. The jumpers should have a pitch of 800-1000mm.

Manufacturing and installation of reinforcement cage

1. It should be noted that the construction of a metal frame occurs directly in the formwork, because it is impossible to place the assembled frame due to partitions and the significant weight of the structure itself.
2. To ensure that the frame is in a “suspended” state and its elements are not adjacent to the aerated concrete blocks, the remains of bricks or other construction debris are placed under it.
3. Calculation of side elements metal frame(stiffening rods) assumes a distance from the formwork of 50 mm on each side.
4. To begin the process, two long metal rods are laid parallel to the bottom of the formwork, and constrictions (connectors) are welded between them. If a welding machine is not used, the joints are tied together with dressing wire.
5. Rods are welded or tied perpendicularly to the created “ladder” base. To create a full-fledged reinforcement “cage”, the upper part is attached to the rods in a similar way to the lower version.
6. Along the entire length of the frame and especially at the corners of the building, the reinforcement should be strengthened with additional adjacent rods. The more jumpers and additional elements in the frame, the better.

Pouring concrete onto a metal frame

Before you start pouring the constructed frame, you need to make sure that the capabilities of the concrete mixer and 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 supply (pouring) of concrete. If the process complies with the technology, cracks will never appear in the armored belt and the integrity of the structure is guaranteed.

Components of concrete:

• Cement M400-500.
• Sand.
• Fractional screening (5×6 or 5×7mm).
• The proportions are 1:3:5 plus water in the required amount.

The prepared solution is gradually poured into the formwork and to prevent the formation of “air cushions” on the surface it is necessary to walk with a hand tool - a vibrating plate. With its help, the concrete mixture will penetrate into all areas of the formwork.

Formwork filled with concrete cannot be dismantled in the first two days (natural bonding of the mixture). After the deadline has passed, dismantling is necessary, but further work cannot be started, because the final strength of the reinforced belt is achieved 15-20 days after pouring.

Current prices

• 1 linear meter rod (12mm) – 80-100 rubles.
• Dressing wire (100m) – 250-300 rubles.
• Sand (1000kg) – 800 rubles.
• Elimination (1000kg) – 1700 rubles.
• Cement (50kg) – 450-500 rubles.

In accordance with current ruble exchange rates, 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, you should add + 45-50% to their wages in the overall estimate for the purchase of materials.

Dimensions/thickness of armored belt

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

Changes in overall dimensions are quite acceptable, because buildings have various characteristics, and the strength of the walls can only be guaranteed by an armored belt.

Aerated concrete without armored belt

In 95% of cases, 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, the buildings are slightly deformed and cracks appear in the walls (this is a draft).

What to replace it with?

Considering the fact that a reinforced concrete structure (reinforced belt) is a rather expensive structural element when building a house, it can be replaced with a less cheap one - brick. As a rule, it is used which performs two functions during the masonry process - 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 at all, because in the future its surface will be refined - plastered.

The armored belt is made like a regular one, but with one addition - a metal mesh (0.5-07mm) is placed 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 you confidence.

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

Conclusion

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

The armored belt is a monolithic reinforced concrete structure that runs along the perimeter of the entire building to increase the structure’s resistance to external and internal loads. It could be shrinkage at home, natural phenomena, interior decoration and much more that causes wall deformation. An armored belt 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 cracks do not 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 attach the Mauerlat to the wall. This creates a point load that aerated concrete cannot withstand.
• If you lay beams rafter system directly onto aerated concrete, without creating a reinforced belt, this can lead to many problems. If there is the slightest deviation in the roof level, cracks will appear.
• The seismic belt is a rigid frame that also distributes the load evenly across the entire house. 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 consistently, while observing many rules.

Materials, tools, sequence of work

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

• Water.
• Gas blocks, for example.
• Boards.
• Fittings.
• Stone.
• Concrete mixture.
• Net.
• Brick fragments or rubble.
• Insulation.
• Wall chasers, electric and manual.
• Diameters.
• Equipment for aerated concrete.

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. Typically, 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 quantity are calculated.

Formwork

To fill a structure with concrete, it must be done removable formwork, most often it is made from boards whose thickness is 2 cm or more. U-blocks and brick are also suitable, but we will focus on the classic version.

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

To arrange the formwork, they usually use knitting wire and spacers, which are made of wood 15 cm long. The simplest formwork option is considered to be a frame made of boards. They are spliced ​​together from the outside with pieces of wood. The top of the box must be secured with transverse ties so that it can withstand pouring concrete and 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 heat loss through the unloading belt is minimal.

Reinforcement cage

The frame is equipped in several ways: a couple of rods or four (then in cross-section it will look like a square). This can be calculated 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 reinforcement. It is best to tie it using a special wire directly in the formwork. You can do this in advance, but lifting such a structure once assembled will be problematic. The frame must be placed level, this is checked using a level. It is important that the reinforcement is at least 5 cm away from the formwork walls.

Of great importance correct filling unloading belt, it is monolithic, so it needs to be poured at a time. Many people order ready-made concrete, but it must have a grade of at least M200. When making the solution yourself, you need to mix crushed stone, sand and cement in a ratio of 5:3:1, and bring the solution to the desired consistency by adding water; it is best to rent a concrete mixer.

The most important thing is that 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 installed. When the next portion is ready for pouring, the partition is removed, and the joint must be thoroughly wetted with water.

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

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

The reinforced belt in a house made of aerated concrete, brick (other block materials) during construction serves as additional protection for walls and other load-bearing structures from deformation and movement. 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, soil movement, terrain features of the site and, of course, seismic activity of the earth. Internal factors include redistribution of the load from load-bearing elements, connection of columnar elements (foundation), installation of additional fasteners and structures.

To study the issue in more detail, let’s consider the process of installing an armored belt using the example of a house made of aerated concrete. However this technology applicable to other types of houses, where the walls can be made of brick, expanded clay blocks and any other block materials. But, first of all, let’s 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 armored belt in the house?

To understand the principle of operation of the reinforcing protective structure Let's consider it as part of building a house. Any stone or block material works better in compression than in tension. Tensile and torsional loads can arise both due to settlement of the building, heaving of the soil at the foundation, and for other reasons. This may also be caused by incorrect calculation of bearing capacity, as a result of which walls in different areas will receive both compressive and more critical tensile loads. These masonry areas 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.

Let’s take a house made of aerated concrete as an example and look at the diagram. In the lower part it is almost always performed, which is still the same protective belt. A properly executed warping copes well with loads, so there should be no problems at this level. Using an interfloor armored belt, we add reinforcement to the structure that copes with stress. At the same time, 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 much better. The sum of all these properties increases the seismic resistance of the house, which is a mandatory requirement for any residential building in earthquake-prone areas. We looked at a multi-story scheme, but the armored belt is also applicable in a one-story house with or without an attic. In this case, a belt under the Mauerlat is used in conjunction with the foundation.

The armored belt 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 necessary to perform reinforcement under reinforced concrete floor slabs. A similar principle of load redistribution also applies to wooden base for rafter legs. But, at the same time, in order to properly secure the Mauerlat to a structurally weak wall, an armored belt is needed. The under-roof belt will increase the structural rigidity of the walls and will also resolve issues regarding the fastening of roof structures.

Calculation of reinforced belt

Armopoyas - main stages of manufacturing

Rebar frame

Assembling the frame begins with installing reinforcement on the top of the wall. When laying it, it is necessary that it is subsequently recessed in concrete at least 40 mm from the outer boundaries of the monolithic belt. When working with aerated concrete, for convenience, you can drive control sections of reinforcement into it. And attach the frame to the segments with a given distance from the top of the masonry. To tie the reinforcement together, you will need a soft binding wire. To set the dimensions of the frame, it is recommended to create a square of four pins or bend it from a solid rod (transverse clamp). These clamps are primarily attached to sections driven into the wall at a certain interval - usually 250-300 millimeters. If you do not drive in the control pins, you will need special pads - clamps to raise the frame itself. Therefore, consider the feasibility of one method or another. Having completed this work, we move on to fastening the reinforcement.

The lower row of longitudinal reinforcement is inserted into frames - clamps and connected with wire. The top row is fastened in the same way (the longitudinal reinforcement must be inside the clamp). As discussed above minimum required- two fittings at the bottom and two at the top. For additional rigidity, the amount of reinforcement and frame configuration can be changed. Naturally this will affect material costs. But if this is necessary, you should not neglect the calculation. We also note that the length of 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 indentations from the edges of at least 40 millimeters.

Formwork

Let's consider the formwork. What options for installing a monolithic belt in a private house may 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 covering 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 permanent 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 how to insulate the concrete strip. It is advisable to insulate the block from the outside, but if it is in certain cases impossible - put 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 100-150 mm thick.
• Next in order, we insulate the armored belt to cut off the cold bridge. Instead of extruded polystyrene foam thickness 50-100mm can be used mineral wool increased density, which is used in the “wet facade” technology.
• Reinforcement frame.
• On the inside of the wall, blocks 50-100 millimeters thick 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 use additional ties made of bars or reinforcement connecting the internal and external blocks.

Performs several functions: it gives shape to concrete, protects it from spreading and subsequently serves as an excellent insulator.

The advantages of this formwork method:

• Easy to assemble formwork. Ready-made blocks are produced, including corner and joints.
• High installation speed.
• The installation of reinforcement is made easier 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 and sudden temperature changes.
• Extruded polystyrene foam is a waterproofing material.

This technology may seem very expensive. But if you 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 this will be a more labor-intensive option.

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

At the second stage, ready-made panels are installed around the perimeter of the future reinforced belt. The concrete solution will create pressure on the walls of the formwork, so in order to prevent the formwork from moving apart, it is necessary to secure the entire structure with clamps.

Pouring 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 concrete should not be lower. At self-production solution using M-500 cement, the following proportion will help: a bucket of cement / three buckets of sand / five buckets of crushed stone. It is recommended to use thick concrete - this way it does not put too much pressure on the formwork. It should not be forgotten that the concrete must be properly compacted. After pouring the concrete, cover it with film. This way you will reduce moisture evaporation. As a rule, it takes about two days for the concrete to completely set, after which the formwork can be removed (provided that it is collapsible).

Video: armored belt in a house made of aerated concrete

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

To conclude, we note that the reinforced belt in a house made of aerated concrete and any other block material is waterproofed before further stages of work. Whether this is advisable or not is up to you to decide. Naturally, when considering the foundation belt, it must be covered with insulation in any case, since there is moist soil nearby. With belts above the foundation, with correct device walls, there should be no moisture in the concrete. But still, it would not be amiss 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 from this material are, unfortunately, significantly inferior to the latter. Therefore, laying walls from this material has some nuances. Firstly, it must be carried out on a very reliable foundation, and secondly, during construction the evenness of the structure should be carefully checked. The third condition for the reliability of aerated concrete walls is the installation of a reinforced concrete armored belt on top along the entire perimeter. We'll talk about it in this article.

Purpose of the design

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, the armored belt should be constructed strictly adhering to the prescribed technology.

Device methods

You can make an armored belt for aerated concrete walls correctly and with your own hands in two ways - using wooden formwork or special additional blocks. The first filling option is technologically more difficult. Constructing a structure using blocks is a very simple procedure, but will cost more.

How to make an armored belt using formwork?

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

Material	Characteristics	What is it needed for
Edged board	Minimum 2.5cm thick	Manufacturing of formwork
timber	40x40mm	Manufacturing of formwork
Nails		Attaching boards to the wall
Wire	Flexible	To add rigidity to the formwork structure
Expanded polystyrene	20mm	Insulation of armored belt

Tools you will need are a drill and a hacksaw

The height of the armored belt is usually 40 cm. Therefore, each side of the formwork will have to be knocked down from two boards 20 cm wide. Instead of boards, you can use thick plywood.

Important: The formwork must be installed immediately along the entire perimeter of the wall. There should be no horizontal joints in concrete.

They fasten the formwork panels to the walls with self-tapping screws, or simply nail the elements with long nails. Spacers from 40x40 timber are installed on top between the shields, spacers are cut out to the same length, equal to the width of the armored belt. They are installed between the shields in 1.5 meter increments. In order for the reinforced belt on aerated concrete to be absolutely even, the structure should be given rigidity. To do this, the opposite beams holding the shields together (they should protrude about 20 cm above the surface) are intercepted with wire and twisted with an iron rod, tightly pressing the walls against the spacers.

Tip: On the inside of the house, the formwork panel (from the inside) can be lined with sheets of expanded polystyrene. Concrete has a much higher degree of thermal conductivity than aerated concrete and therefore, without insulation, the armored belt will become a cold bridge, which will worsen performance characteristics building. After pouring the armored belt and removing the formwork panel, the polystyrene foam can be secured to the concrete with “fungi” dowels or in some other way.

Fill

An armored belt is installed for a building made of aerated concrete with mandatory reinforcement. To make the structure more reliable, a 12mm rod is used. The frame is tied together using 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 or special blocks plastic coasters. The filling itself must be done at one time. If this cannot be done, first pour a layer around the entire perimeter of the formwork without interruptions. The next one will need to be filled no later than 12 hours later.

Construction of an armored belt using blocks

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

Well, we hope 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, but the walls will be much more reliable and durable.

Video on the topic “How to make an armored belt for 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 long. This is a simplified but very clear explanation of the need to strengthen walls. Anyone who is planning to build a durable house will benefit from information about the purpose, types and design 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 reinforced belt is poured in the foundation, under the floor slabs and under the mauerlats (rafter support beams).

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 with walls made of light blocks.

Reinforced concrete has been and remains the main material for increasing the rigidity of walls. 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 load-bearing wall. In the seam of each row, a mesh with a cell of 30-40 mm made of steel wire with a diameter of 4-5 mm is placed on the mortar.

In what cases is an armored belt needed?

For walls

Reinforcing walls with a reinforced belt is not always required. Therefore, there is no need to waste money on its device in the following cases:

• under the base of the foundation lies a strong soil (rocky, coarse clastic or coarse sand, not saturated with water);
• the walls are built of brick;
• a one-story house is being built, which is covered with wooden beams rather than reinforced concrete panels.

If the site contains weak soils (pulverized 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 even when the walls are built from expanded clay concrete or cellular blocks (foam or aerated concrete).

These are fragile materials. They cannot withstand ground movements and point loads from interfloor floor slabs. The armored belt eliminates the risk of wall deformation and evenly distributes the load from the slabs onto 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 someone may think that an armored belt is not needed under it. However, the correct answer to this question depends on the material from which the house is built. Fastening the 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 armored belt will have to be filled. B, and the anchors cannot be securely fixed. Therefore, a very strong wind can tear the Mauerlat from the wall along with the roof.

For the foundation

Here the approach to the amplification problem does not change. If the foundation is assembled from FBS blocks, then an armored belt is definitely necessary. Moreover, it must be done at 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 during the rise and settlement of the soil.

Rubble concrete strip foundations also require reinforcement with a reinforced belt, at least at the level of the sole. Rubble concrete is an economical material, but not resistant to soil movements, so it needs reinforcement. But a monolithic “tape” does not need an armored belt, since its basis is a steel three-dimensional frame.

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

What types of interfloor ceilings require an armored belt?

Under panels that rest on expanded clay concrete blocks, gas or foam concrete, a reinforced belt must be made.

For monolithic reinforced concrete floor it does not need to be poured, since it evenly transfers the load to the walls and firmly connects them into a single spatial structure.

An armored belt for a wooden floor that rests on light blocks (aerated concrete, expanded clay, foam concrete) is not required. In this case, it will be enough to pour concrete support platforms 4-6 cm thick under the beams to eliminate the risk of pushing through the blocks.

Someone may object to us, pointing out a number of cases when the reinforced belt is poured under the wooden floor of the floor. However, in this case, reinforcement is required not because wooden beams on concrete pads are capable of pushing through the masonry, but to increase the spatial rigidity of the building frame.

How to make an armored belt correctly?

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

In general, it consists of three operations:

• Manufacturing of reinforcement frame;
• Installation of formwork;
• Pouring concrete.

Certain subtleties and nuances in the work appear depending on the area where the armored belt is located.

Reinforced belt for the 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 greater than the width of the supporting part of the main concrete “ribbon”. This will significantly reduce the pressure of the building on the ground. 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 external ones. The frame for it is made by knitting reinforcement clamps. Welding is used only for preliminary connection (tack welding) of the main reinforcement into a common spatial structure.

Armoyas of the second level (on the foundation)

This design is essentially a continuation 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 reinforced belt. To do this, you need to leave free space in it (20-30 cm) for installing the reinforcement cage, taking into account the protective layer of concrete (3-4 cm).

The situation is more complicated, since formwork is not installed for them. In this case, wooden spacers should be used, which support the formwork panels from below. Before installation, cut boards are stuffed onto the boards, which protrude 20-30 cm beyond the dimensions of the formwork and prevent the structure from moving to the right or left. To connect the formwork panels, short crossbars are nailed to the top of the boards.

The fastening system can be simplified by using threaded rods. They are placed in pairs in the formwork panels at a distance of 50-60 cm. By tightening 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 that will be poured with concrete should be wrapped in glassine or a little applied to them. machine oil. This will make it easier to remove them from the concrete after it has hardened.

Reinforced belt 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 is completely lined with slab insulation. If for decoration it is decided to use only plaster mortar, then the width of the armored belt will have to be reduced by 4-5 centimeters in order to leave room for foam plastic or mineral wool. Otherwise, a through cold bridge of very substantial dimensions will appear in the area where the stiffening belt is laid.

When making an armored belt on aerated concrete, you can use another solution. It consists of installing two thin blocks along the edges of the masonry. In the space between them is placed steel frame 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 partition blocks 10 cm thick can be used for this purpose.

If the wall thickness is smaller, you can cut it yourself in a standard masonry block cavity for an armored belt or buy a ready-made aerated concrete U-block.

Reinforced belt under the Mauerlat

The main feature in which the armored belt under the Mauerlat differs from other types of reinforcement is the presence of anchor pins in it. With their help, the beam 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 reinforcement frame must be such that after embedding the structure between the metal and the outer surface of the belt, at least 3-4 cm of a protective layer of concrete remains on all sides.

Armored belt design and technology

If you make a high-quality foundation, the house will last for a long time, and no problems will arise. In order to strengthen the base and significantly increase its technical characteristics, it is worth making an armored belt. At the same time, it is important to follow all the recommendations of specialists to ensure that the structure is strong and reliable.

Features of using the armored belt

Armored foundation belt must be used in some cases. It is imperative that additional reinforcement be used if or stone. In this case, it does not matter what material the walls will be built from in the future. The reinforced belt is monolithic structure, which has a closed contour along the entire perimeter of the base. It is also advisable to use a reinforced belt on false and unstable soils. This structural element is designed to:

• distribute all loads from the walls evenly along the entire perimeter and transfer it to the underground part of the foundation;
• prevent shrinkage and, as a consequence, cracking of the foundation, which can lead to the destruction of walls;
• strengthen the foundation if the house is built on sandy soil or with a high location of groundwater.

Features of the reinforced belt

Also, a reinforced belt should be used if the area is subject to seismic activity. This will prevent the destruction of not only the foundation, but the entire building. It is worth noting that the reinforced belt can be of several types:

• basement;
• grillage;
• under the Mauerlat;
• interfloor.

Making an armored belt with your own hands

If desired, such foundation strengthening can be done with your own hands. To do this, you will need to prepare the necessary tools and materials that will allow you to complete the work efficiently and in accordance with norms and standards.

Required tools and materials

To begin with, it is worth preparing a tool with which you will make a plinth armored belt or another type of reinforcing structure. As for the inventory, the list is quite small; during the execution process you will need:

• concrete mixer;
• buckets and shovels;
• welding machine (if the reinforcing mesh will be welded);
• Bulgarian.

Tools for preparing an armored belt

As for materials, you need to prepare wire of the required diameter and concrete solution. It is worth noting that the solution can be ordered from a specialized company in the right amount or cook it yourself. This will require cement, sand and crushed stone. All components are thoroughly mixed in a certain proportion. In this case, it is necessary to control the consistency of the solution. In cases where the filling of the armored belt is not carried out in the most suitable weather conditions, during the preparation of the solution, you can add special plasticizers and additional additives to it that will help improve technical qualities ready-made concrete.

Before making an armored belt, it’s worth... To begin with, you need to choose the right fittings. For this purpose, you can use products with a diameter from 10 to 16 mm; this is the best option. This type of fittings will cope with the task perfectly.

Having chosen the reinforcement, you can begin to cut rods of a special size; this procedure is performed using a grinder. The rods can be connected to each other by welding, but it is best to use a special knitting wire. The second connection option allows the reinforcement to move freely during concrete deformation. This allows you to maintain the integrity of the entire structure.

Selection of fittings

The frame guides can be made of thicker reinforcement; for the lintels, a smaller diameter can be used. It is worth noting that both types must be ribbed; it is with such reinforcement that concrete adheres much better. The transverse rods should be located at a distance of no more than 50 cm from each other; only in this case can a high-quality and reliable frame be obtained.

Formwork installation

For formwork installation can be used various materials. Wood is most often used for this purpose. It could be:

• board;
• plywood;
• croaker;
• OSB boards.

Regardless of the option chosen, it is important that the side adjacent to the mortar is smooth and without any defects. The tightness of the mold and the evenness of all surfaces depend on this. In addition, such a material has the necessary strength and will withstand a fairly large load from the cement mortar.

Connections of all elements of wooden formwork can be made using self-tapping screws of suitable length or nails. It is important that the interconnected boards are securely fastened to the finished concrete base. It is also worth using parallel crossbars between the shields as additional reinforcement. This will allow the boards not to come apart under pressure and maintain their shape.

Pouring concrete

After the formwork is installed, you can proceed to the actual construction of the armored belt. To do this, it is necessary to position the reinforcement frame and fill it with concrete mortar. You can prepare the solution yourself or purchase a ready-made one and deliver it to the construction site. After the solution dries, the formwork can be disassembled. If it has been installed correctly, after dismantling it can be used for similar work.

Installation of interfloor reinforcing belt

Installation of interfloor armored belt

Between floors, before laying floor slabs, it is imperative to install an armored belt. Such a structural element can be made regardless of what material the walls are made of. This additional reinforcement will evenly distribute the load from concrete slabs on all walls. You can make an armored belt only by external walls and load-bearing structures. It is worth noting that the reinforcement frame can only be made of two cores. This design is sufficient to strengthen the walls. Armored belts can also be used as jumpers on windows and doors.

Armobelt for the foundation of an already built house

The construction of the foundation in past years was not always carried out in compliance with all technologies. Also, after years of operation, the foundation may to some extent lose its technical characteristics. In order to strengthen it and extend the life of the building, you can use an armored belt.

Strengthening the foundation of an old house with an armored belt

Don't forget about making a pillow. It can be made from sand, screenings or small crushed stone. Its role is very important because it will protect the foundation from the effects of moving soil. Also, as additional protection, the surface of the old foundation can be treated with special mastics that will protect it from negative impact moisture. You should first let the surface dry for a couple of days. Mastics should only be applied to a dry surface.

To fasten the base of the house with an additional reinforced belt, it is worth driving special reinforcement tabs into the first one. This will allow you to connect more reliable foundation and armored belt. As connecting elements Reinforcement bars or metal plates of suitable length can be used.

The next stage is the installation of a reinforcement cage. The work scheme is no different from the construction of a conventional frame, which is used when pouring a foundation. After laying it in the prepared trench, you can begin pouring the concrete solution.

When constructing such a reinforcing structure, it is imperative to use some recommendations; this will allow you to build a reliable and durable structure.

1. The thickness of the armored belt depends directly on the characteristics of the base and the purposes for which it is installed. On average, it is enough to pour 200-400 mm of solution to get a reliable belt that can withstand fairly heavy loads.
2. At self-cooking concrete, it is necessary to use grade 400 cement and clean sand without admixtures of clay and other debris. Otherwise, the concrete will not gain the necessary strength.
3. The armored belt can be used only after the concrete has completely hardened.
4. If the belt is made under the Mauerlat, it may be necessary to make metal tabs, with the help of which additional fastening will be carried out.

When performing all the work, it is very important to control each stage, and it is necessary to follow the technology. Only in this case will the end result last a very long time and at the same time fully retain its technical characteristics.

Armopoyas (reinforced concrete belt), also known as seismic belt– a very strong monolithic strip along the perimeter of the building and load-bearing walls made of aerated concrete.

Tasks of the armored belt – significant strengthening of load-bearing walls to increase their bearing capacity, in order to avoid cracks and other deformations due to uneven shrinkage of the building, roofing, wind and other loads.

The armored belt firmly holds aerated concrete blocks together, distributes the load evenly and creates structural rigidity.

Ideally, the geometry, reinforcement and concrete composition of the reinforced belt are determined by calculations.

Typically the width (thickness) of the armored belt equal to the width of the wall, 200-400mm, and the recommended height is 200-300mm.

But it would be wiser to make the width of the armored belt a little thinner than the wall, so that there is room for insulation to reduce cold bridges. Extruded polystyrene foam (EPS) is best suited for this task, as it insulates heat well. There is also the option of pouring an armored belt into ready-made aerated concrete U-blocks, but see this further in the text.

1. In case of uneven shrinkage of the house, during seasonal heaving of the soil, during earthquakes, the reinforced belt maintains the geometry of the building.
2. An armored belt can level walls horizontally.
3. Adding rigidity to the entire aerated concrete building.
4. Local loads are distributed evenly across load-bearing walls.
5. The high strength of the armored belt allows you to attach all important structures to it, for example, a power plate.

The Mauerlat must be firmly attached to load-bearing walls studs and anchors. The rafter system itself, the weight of the entire roof, snow and wind loads create a significant bursting force that can break unreinforced walls. An armored belt under the Mauerlat solves this problem, and it will be performed in the same way as under the ceiling.

1. The framework of the belt reinforcement must be continuous.
2. The armored belt must be on all load-bearing walls.
3. The overlap of longitudinal reinforcement is at least 800 mm.
4. The frame is made of two rows of reinforcement, two rods each.
5. The minimum thickness of longitudinal reinforcement is 10 mm.
6. It is advisable to use long (6-8 meters) reinforcement bars.
7. The diameter of the transverse reinforcement is 6-8 mm.
8. The pitch of transverse reinforcement is 200-400 mm.
9. The reinforcement on all sides must have a protective layer of concrete of at least 5 cm.
10. Longitudinal and transverse reinforcement are connected to each other with knitting wire.
11. At the corners, the longitudinal reinforcement must be bent, and try to overlap further from the corner.
12. The frame must be strictly horizontal.

Calculate the distance between the reinforcement bars based on the thickness and height of the reinforced belt, taking into account the protective layer of concrete, at least 5 cm on each side.

Do-it-yourself reinforced belt for aerated concrete (video)

Scheme of reinforcement of corners and junctions of the armored belt

Insulation of armored belt

The armored belt is a very serious “bridge” of cold, through which it escapes most of heat, and on which condensation forms on the inside of the armored belt. And to avoid this, you need to insulate the outer side of the armored belt with aerated concrete, or polystyrene foam or polystyrene foam. Expanded polystyrene is more preferable. So you need to provide space for insulation in advance, filling the armored belt with an indentation from the outer edge of the wall.

Insulated armored belt for aerated concrete

What brand of concrete should be used to fill the armored belt?

To fill the reinforced belt over aerated concrete, concrete grade M200-M250 is used. It can be prepared in a ready-made form with a mixer from the factory, or you can make it yourself.

Proportions for concrete grade M200: cement M400, sand, crushed stone (1:3:5). Proportions for concrete grade M250: cement M400, sand, crushed stone (1:2:4).

There should be a minimum amount of water in concrete, and use a plasticizer to impart plasticity.

The water-cement ratio should be in the range from 0.5 to 0.7, that is, for 10 parts of cement there are from 5 to 7 parts of water.

Adding too much water to concrete makes it less strong.

To remove air bubbles from concrete, it should be vibrated with a special construction vibrator, or pierced intensively and for a long time liquid concrete cutting off reinforcement.

Concrete must be poured into the formwork at a time so that it is monolithic (indivisible).

The reinforcing belt is a mandatory rigidity contour necessary for the building to be truly strong and durable. It does not allow loads to “accumulate” in one or another part of the supporting structures, but distributes them evenly. Thanks to it, shrinkage of the new house, soil heaving and other external factors pass through the walls without consequences - that is, without cracks.

The brick armored belt is a small continuous masonry reinforced with longitudinal metal rods or mesh. Of course, this is not a full-fledged monolith, but in many cases this simple solution turns out to be quite enough. The ability of the armored belt to equalize loads comes in very handy if the main material of the walls is not resistant to deformation. Products like aerated concrete, even with good compressive strength, practically do not work in bending. Uneven application of force will inevitably lead to cracking.

The reinforcing belt solves this problem by taking the main load on itself and not allowing light walls shift relative to each other when exposed to multidirectional or unequal forces. It is also allowed to use brick instead of a more expensive concrete monolith for reinforcing small outbuildings and low-rise buildings. He will successfully withstand unfavorable external conditions(strong wind loads, subsidence or uneven heaving of the soil), but at the same time it is much easier to make it yourself - without haste and the need to process a decent volume of solution at a time.

Another function that a reinforced belt can perform is fastening other elements of the building to the box with anchors, if wall material He himself is not able to hold them. This is a common drawback of all cellular concrete and expanded clay blocks. Even mauerlat beams cannot be sewn to them using traditional methods without further destruction of the walls. So you will have to make dividing brickwork in any case.

A double reinforcing belt, placed under the sole and on the upper section of the columnar foundation, performs well. In this case, seasonal soil movements will not be able to “play” with the supports, because they will actually turn into a single truss, rigidly fixed by two ties.

Main types of unloading belts

Depending on the location of the armored belt, it can wear different names and take on certain functions:

1. Grillage - placed between a columnar or pile foundation houses and walls. However, they don’t build it out of brick - it’s too important a site.
2. The plinth is the second level of unloading and reinforcement, which is used in the construction of houses on a foundation made of concrete blocks. It provides the base with greater rigidity on moving soils and is also made of reinforced concrete. Although a fairly common option is brickwork, which serves as permanent formwork for subsequent pouring.
3. Unloading is an intermediate reinforced belt under the floor slabs, which not only takes on their weight, but also ensures the rigidity of the building above one floor at each level. When building from lightweight concrete blocks, you cannot do without it, and here the best way is brick.
4. A support under the Mauerlat is a mandatory element of a house made of aerated concrete or other porous blocks that do not easily absorb point and multidirectional loads. In addition, fastening the timber itself with studs in such walls turns out to be unreliable even when using chemical cladding. Here, the reinforced belt for walls made of aerated concrete turns into a kind of connection between the blocks with which it is connected with mortar, and the roof truss, reinforced through a mauerlat beam.

Features of laying on aerated concrete

Usually, brick belt They are made 4-7 rows high and the width of the wall being strengthened. Reinforcement must be performed in each horizontal seam using a steel mesh with a cell size of 3-4 cm or rigid wire with a thickness of at least 5 mm. Installation is carried out in the same way as in the case of conventional brick walls:

• with seams offset by 1/3 of the length;
• with tie dressing in every third row.

If an armored belt for aerated concrete made of brick serves as a support for the Mauerlat, vertical metal pins can be immediately walled into the masonry threaded rods with a diameter of 12-16 mm. They are installed in increments of 1-1.5 m, and the depth of their embedding will depend on the thickness of the beam - it should be twice as long as the free end for attaching the Mauerlat. However, many builders advise immediately embedding cuttings to the entire height of the armored belt.

After the mortar has set, roofing felt or two layers of roofing felt are spread on the surface of the masonry. This is waterproofing that will protect the timber itself and the brick superstructure from the accumulation of condensing moisture. Next, the Mauerlat is outlined and drilled at the required points, threaded onto the stud releases and fixed on the reinforcement belt with nuts for wide washers.

Since ceramics have greater thermal conductivity than the main wall material, it turns into a kind of cold bridge (although monolithic reinforced concrete in this case it manifests itself even worse). So that during the further operation of the building in winter period If there were no problems, you can try to “close” the contour of the cellular blocks in parallel with laying the brick. To do this, a thin partition from the GB is removed from the side of the premises, as if hiding the armored belt inside aerated concrete wall. If a gap has formed between the surfaces, experts recommend additional thermal insulation.

Stages of constructing a belt under the ceiling

If the rigid contour under the roof plays the role of unloading and reliable support for Mauerlat timber, it is enough to lay it around the perimeter of the house box. However, the use of slabs for interfloor or attic floors will force the middle load-bearing wall to be covered with rows of bricks. Here, aerated concrete can also experience loads, so a rigid layer for its reinforcement is simply necessary.

No matter how light the floor slabs are, they cannot be supported directly on cellular or expanded clay concrete blocks. The masonry will be able to withstand their weight, but if the direction of the applied force changes, it will begin to collapse. In this case, the belt serves as a kind of buffer that distributes the pressure of the slab over the entire area of ​​the walls, preventing push-through load-bearing structure. It is possible to refuse a thick layer of solid brick only when the ceiling is made of wood - here they make do with a backing for the beams in one or two blocks.

Otherwise, the armored belt is under hollow core slabs built according to all the rules. Main stages of work:

• The first row is planted directly on aerated concrete using a solution. If the thickness of the main wall is standard (30 cm), laying is done in two bricks, filling the gaps with “checks”.
• Installation of reinforcing mesh along the entire belt line.
• Laying the second row according to the same pattern with subsequent reinforcement.
• The third row of bricks is bonded. Here you need to focus on the inner plane of the wall. The gap remaining outside is filled with either quarters or pieces of mineral wool, if an insulated ventilated facade is being erected at the same time.

Under the top row of aerated concrete, on which the belt for the floor slabs is placed, reinforcement must be laid in the grooves. This will add rigidity to the entire structure and provide the walls with additional protection from cracks. Otherwise, once they appear, they will crawl lower.

According to the above diagram, the armored belt is laid out to the entire required height, after which floor slabs can be safely mounted on it. Anchoring in progress in a standard way for brick walls - using L-shaped metal brackets. Fastening elements are covered with a layer of cement mortar to protect against corrosion.

An armored belt on aerated concrete is a structural element that protects the house from all types of loads and deformations. It is installed on the foundation, on each floor and at the junction of the roof with the floor. The structure is made of cellular blocks or bricks and connects the walls into a single whole, like a kind of stiffening rib.

The reinforcement structure is a closed monolithic system that follows the perimeter of the house. The main function is to protect the building from deformation and ensure strength, rigidity, reinforcement, uniform load distribution. Is it necessary to make an armored belt for aerated concrete?

There are a number of reasons why its construction is considered mandatory:

• The fasteners used when installing the rafter system are a source of point loads, which provokes the formation of cracks. Similar loads are placed on the walls if the beams are laid directly on the block;
• if a system is used when constructing the roof hanging rafters, an armored belt on aerated concrete made of brick or block helps to distribute loads evenly across the entire frame;
• when is it being built two-storey house, including with the participation of other materials, for example, wood, the reinforced belt under the floor slabs ensures the resistance of the walls to mechanical stress and becomes the support of the floor.

Due to the contact fragility of aerated concrete, it is dangerous to rest power structures directly on it

How to make an armored belt on aerated concrete - video

All manipulations can be carried out manually if you have at least some experience in construction. It must be securely fastened to the solid wall.

Reinforcement cage

Modeling of the frame mesh is subject to the general standards adopted when conducting concrete work.

Technological principles:

• the ring frame is formed on the basis of four reinforcement bars fixed by jumpers;
• in cross section the frame is square or rectangular;
• a ribbed rod is used for work, longitudinal - 8-14 mm, transverse - 6-8 mm;
• cell pitch – 100-150 mm.

The rods should not come into contact with the base material; plastic or wooden supports will help. They will allow the filling to be distributed evenly.

How to make an armored belt for aerated concrete from U-shaped blocks

This is a universal, but more expensive option compared to similar technologies.

Sequencing:

• Tray modules are placed on the top row of masonry using an adhesive solution;
• the size of the armored belt for aerated concrete must correspond to the thickness of the wall, with a height of no more than 30 cm;
• inside the block, closer to outside, fits thermal insulation material(layer of expanded polystyrene);
• The reinforcement frame is laid and the concrete mixture is poured.

Using partition blocks

The system simulates the laying of U-blocks. The modules play the role of permanent formwork; the strength of the adhesive mass is sufficient to withstand the load from pouring concrete.

Sequencing:

• using glue mixture placed on the top row of masonry septal block(100/50 mm). A small block is placed on the inside;
• Thermal insulation and reinforcement frame are laid out inside;
• filling is carried out.

In a similar way, the construction of an armored belt made of bricks on walls made of aerated concrete is realized, which is advisable with a thickness of 510-610 mm. Two walls of the structure are laid out in half a brick, reinforcement is laid into the resulting cavity and concrete is poured. Brick armored belt can be laid on the foundation, under floor slabs, under the roof.

Using removable wooden formwork

It is better to choose boards with as smooth a surface as possible. The armored belt will be smooth on top

Such an armored belt is most often installed on houses built on the basis of 300, 250, 200 mm blocks. The panel formwork frame is created on the basis regular boards, OSB, laminated plywood. The height of the system should be 200-300 mm, the thickness corresponds to the thickness of the wall.

Technological principles:

• 100 mm partition blocks are laid on the top row of masonry closer to the outer part of the wall using an adhesive solution;
• panel formwork is installed on the inside;
• When the supporting frame is ready and the reinforcement is laid, M200 concrete is poured. You can use more durable material M300/M400 if the height of the object exceeds one floor.

An armored belt on aerated concrete under wooden floors can be laid on double-sided formwork with polystyrene foam on the outside.

Pouring armored belt on aerated concrete

The filling must be monolithic, that is, done at a time. It is highly undesirable to lay the solution in parts. If the master is forced to act in this way, he must install intermediate jumpers made of wood.

When performing the next pour, these elements are dismantled, the joint areas are abundantly moistened with water, and only then the work continues. The mass is compacted; by manipulating a piece of reinforcement, the voids that have arisen can be removed.

In hot weather, the belt is covered with a film, which will prevent rapid evaporation of moisture and the formation of cracks. After 4 days, the system is ready for subsequent work - laying rafters or floors.

The technology for constructing reinforced belts on foam blocks and reinforced belts on expanded clay concrete blocks is identical to the specified methods applicable to aerated concrete.

How to attach a Mauerlat to aerated concrete without an armored belt

Is it necessary to make an armored belt for aerated concrete in all cases? If the construction is intended small house To fix the walls of a gas block with timber, you can use a simpler method. To do this, metal studs (steel fasteners in the form of bolts with a square base of 5x5 cm) are embedded in the wall.

The fasteners begin to be installed 2-3 rows from the top of the masonry. The length of the pin should be sufficient to pass through the beam.

When a 4-slope roof is being erected, the armored belt must pass along all external walls. If 2-slope, with window openings on gables, belts are placed only under the mauerlat

Reinforced belt for aerated concrete under floor beams

The structure is erected along all external and internal load-bearing walls on which the floor beams will rest (the same applies to slabs).

If the installation of cladding is intended, the armored belt must grip the cladding wall in order to connect it with the main structure. If this stage of work is not implemented immediately, but, let’s say, next year, work is carried out only on aerated concrete.

Reinforced belt on aerated concrete under floor slabs

• when supported along the contour - 40 mm;
• when supported on two sides (span more than 4.2 m) – 70 mm;
• when supported on two sides (span less than 4.2 m) - 50 mm.

Armobelt in a house made of aerated concrete - how to choose sizes

Parameters are determined depending on the dimensions wall structures. The thickness of the armored belt for aerated concrete under the Mauerlat must match the thickness of the wall. For example, a 400 mm wall requires a 400 mm armored belt, 15-20 cm high.

The armored belt on aerated concrete, the dimensions of which are taken into account by the master, responds well to various movements and strengthens the house. For example, when using cladding, the thickness monolithic filling can be reduced by the thickness of the cladding, but during the simultaneous implementation of work in the reinforced belt, the cladding material can also be captured.

Price

If you plan to attract a small team of workers to build an armored belt on aerated concrete, the price will be at least 500 rubles/m.p. The average cost of constructing 1 m³ will be 2.8-3.5 tr.

How an armored belt is organized in practice on aerated concrete is shown in the video: