Possessing low resistance to bending deformations, the reinforcement perceives the tension that occurs when the building is deformed, protecting the walls from cracking and providing protection for aerated concrete blocks. It has no effect on the bearing capacity of aerated concrete masonry. With proper design and construction, crack formation can be avoided. To do this, the masonry is divided into fragments by expansion joints or reinforced. As an additional protection of aerated concrete from cracks, reinforcement of the finishing layers with fiberglass mesh can be used - this measure will prevent cracks from reaching the surface.
The aerated concrete reinforcement project is drawn up taking into account general requirements, features of the building and the specific conditions in which it will function. So, for example, a long wall subject to constant wind loads will need additional reinforcement.
Reinforcement is laid in specially created armored belts. Inter-row reinforcement is not used during the installation of aerated concrete structures, as it violates the thickness of the seams and makes it difficult to lay subsequent rows. An exception is reinforcement with the use of small-section stainless branded reinforcement. It is necessary to reinforce the first row of aerated concrete blocks lying on the foundation, every fourth row of masonry, lintel support zones, a row of blocks under window openings, structural elements experiencing increased load.
When laying reinforcement in the area of lintels and areas under window openings, reinforcement should be extended by 900 mm in each direction from the edge of the opening. In addition, a reinforced ring beam is laid under truss system and at the level of each overlap. For laying reinforcement in the upper face of the blocks, strobes are cut using a manual or electric wall chaser. After the dust is removed from the strobe, the cavities are filled with an adhesive solution. Then the reinforcement is placed in the glue, and the excess solution is removed. To reinforce an aerated concrete wall with a thickness of 200 mm or less, one reinforcement bar with a diameter of 8 mm is sufficient. If the wall thickness exceeds 200 mm, two bars are used for reinforcement. Expansion joints do not reinforce.
designer's opinion: The distances between the temperature-shrinkage seams should be established by calculation.
6.79. The maximum distances between the temperature-shrinkage joints, which are allowed to be accepted for unreinforced external walls without calculation:
a) for elevated stone and large-block walls of heated buildings with a length of reinforced concrete and steel inclusions (lintels, beams, etc.) of no more than 3.5 m and a width of piers of at least 0.8 m - according to tab. 32; with a length of inclusions of more than 3.5 m, the masonry sections at the ends of the inclusions should be checked by calculation for strength and crack opening;
b) the same, for walls made of rubble concrete - according to table. 32 as for masonry of concrete stones on mortar grade 50 with a coefficient of 0.5;
c) the same, for multilayer walls - according to table. 32 for the material of the main structural layer of walls;
d) for the walls of unheated stone buildings and structures for the conditions specified in
p. "a" - according to the table. 32 multiplied by the coefficients:
for closed buildings and structures - 0.7;
for open structures - 0.6;
e) for stone and large-block walls of underground structures and foundations of buildings located in the zone of seasonal freezing of the soil - according to table. 32, with a magnification of two times; for walls located below the border of seasonal freezing of the soil, as well as in the permafrost zone - without length limitation.
Table 32
The average outdoor temperature is the coldest
five days
Distance between expansion joints, m, when laying
From clay bricks, ceramic and natural stones, large blocks of concrete or clay bricks from silicate brick, concrete stones, large blocks of silicate concrete and silicate brick
On brand solutions
50 and
over 25 and
less than 50 and
over 25 and
less
Minus 40 °C and below 50 60 35 40
Minus 30 °С 70 90 50 60
Minus 20 °С and above 100 120 70 80
Notes: 1. For intermediate values of design temperatures, the distances between expansion joints may be determined by interpolation.
2. The distances between the temperature-shrinkage joints of large-panel buildings made of brick panels are assigned in accordance with the instructions for designing the structure of large-panel residential buildings.
Who is right?
Reinforcement of aerated concrete is a necessary construction procedure, which is due to the fact that aerated concrete material, although it is resistant to compressive loads, but with this feature, it is not able to stretch. The slightest bend leads to the appearance of cracks on the surface if the load that affects a particular installation site exceeds the strength of the block. Reinforcement of aerated concrete blocks is carried out by two different ways- strengthening the rows of masonry with reinforcement (mesh) or installing a monolithic belt. Two methods increase the deformation resistance of the masonry, but they do not affect the bearing capacity of the partitions.
Problem areas requiring mandatory wall reinforcement:
Developers often ask the question: is it necessary to reinforce the masonry in every 4 rows of gas blocks. This is determined based on the design features and the length of the walls of the future building, the characteristics of the soil at the building site and the type of foundation. Aerated concrete houses located in climatic, seismic and wind regions need reinforced wall reinforcement.
If the ends of individual reinforcing bars were not tied into one loop, they should be bent at an angle of 90 degrees and deepened into strobes - this will ensure reliable anchoring in the partition of the house.
Technology
First, the method of mounting a reinforced concrete structure designed to strengthen the walls of a building from various loads will be described. Such an armored belt is made of dense blocks 100 and 50 mm thick or a wooden formwork is installed. The first technology is easier and faster to implement.
Order of execution
- A 100 mm block is mounted from the front part of the wall and placed on the adhesive solution to the main masonry.
- On the inside, blocks with a thickness of 50 mm are laid.
- Thermal insulation. Extruded polystyrene foam panels adjusted in height are glued to the wall with five centimeter gas blocks.
- Reinforcement is laid inside the formwork at a distance of 5 cm from the partitions. It is recommended to weld YTONG vertical reinforced aerated concrete lintels to the longitudinal reinforcement every 30 cm, the height of which is selected in such a way that top part the frame was placed at a distance of five centimeters from the outer contour of the monolithic belt. Horizontal connecting rods are welded to the vertical lintels, on which the upper longitudinal belt of the structure must be fixed.
- The space between the blocks should be filled with concrete mortar, the M200 or M300 brand is suitable for this.
Reinforcement with reinforcement between rows does not require special skills. To work, you will need a manual or electric wall chaser. In blocks, 2 strobes are made at a distance of 6 cm from the edge. The depth and width must correspond to the size of the reinforcement used.
After deepening, it should be cleaned of dust and filled with adhesive mortar for laying gas blocks, after which parts of the reinforcement should be laid. Remove excess glue with a spatula. In the corner zones of the partitions, L-shaped rods are used. The fittings are interconnected by welding.
When a mesh is used to reinforce aerated concrete blocks, building materials with 5x5 cm cells made of wire 3-4 mm thick should be used. It is not necessary to do the strobing, when installation work glue is applied to the surface of the gas blocks, the approximate thickness is 2.3 mm. After that, a reinforcement mesh is laid, the edges of which should be 5 cm away from the end of the block. Next, a second layer of glue is applied.
Reinforcement of aerated concrete during masonry
When carrying out work, you should know how to properly reinforce and through how many rows to lay the bars. Reinforcement of the first row of masonry must be carried out without fail, and if necessary, every fourth (whether it is necessary - this becomes clear from the individual characteristics of the building). The process is carried out as follows:
- Strengthening of the structure is carried out with steel bars with a diameter of 8 mm grade A3. Reinforcement of partitions with a thickness of 20 cm, the laying method allows the use of one bar of reinforcement exactly in the middle of the row. In special cases, it is permissible to use reinforcement with a diameter of 6 mm.
- For thick walls, use 2 bars laid parallel to each other. To do this, with the help of a wall chaser, two parallel recesses are made. The distance from the inner and outer edges of the partition is at least 6 cm. In the corners of the building, the gates must be rounded.
- The overlap of the reinforcement is done in the middle of the wall, fixing is done with a knitting wire.
It is not necessary to lay reinforcement around the entire perimeter of each wall row. It will be enough to place the metal reinforcement in the most dangerous parts of the partition structure .
The vertical reinforcement of the walls is a connection between the foundation of the building and the interfloor or roofing monolithic armored belt located above it. This technology is different in that all loads are taken not by wall masonry, but by a reinforcing cage. The walls serve as thermal insulation.
Door and window openings
When reinforcing jumpers, U-shaped blocks are used, which also need to be reinforced by at least 90 cm on both sides of the opening. First made wooden structure in the openings on which the U-block will rest. Such blocks are installed with the thickened side out. It is also recommended to insulate the grooves with a 3-5 cm styrofoam board to close the side walls of the outer surface of the blocks. After that, a reinforced structure is laid, which is poured with concrete. When the concrete has completely hardened, the structure is dismantled.
To prevent the wall laying process from slowing down, U-shaped blocks should be laid together with ordinary ones. After the strobes are filled with reinforcement and concreted. In this case, it is recommended not to forget about the heater.
Reinforcement under window openings requires laying reinforcement in the last row of blocks in front of the window being constructed. To do this, it will be necessary to mark the planned length on the masonry surface, while the reinforcement bars should be half a meter longer than the window.
There are two main types of structural reinforcement in the masonry walls of a house made of small aerated concrete blocks. Both types of structural reinforcement of aerated concrete walls do not increase the bearing capacity of aerated concrete masonry, but only reduce the risk of thermal shrinkage cracks and reduce the opening of cracks during movements and deformations of the building foundation that exceed the permissible limits. Therefore, the feasibility of structural reinforcement should be assessed at the design stage for each specific house made of aerated concrete (cellular concrete). Damage to the structure from excessive reinforcement of aerated concrete masonry cannot be caused.
First type structural horizontal reinforcement of aerated concrete masonry is used to prevent the formation of cracks around window, door and other openings in the walls from aerated concrete blocks. This type of reinforcement can be recommended for all types of buildings made of small aerated concrete (cellular concrete) blocks, with the exception of cases of floor-supported aerated concrete walls in the rear with a load-bearing monolithic reinforced concrete frame.
Second type structural reinforcement of aerated concrete masonry is used for prevention of occurrence of thermal shrinkage cracks(for example, when building from "fresh", just released aerated concrete, which will obviously be subject to shrinkage, which is relevant at the peak of the construction season, when aerated concrete is sold "hot from the autoclave"), when building houses from aerated concrete in regions with significant annual fluctuations in air temperatures , with significant wind loads, or with predicted base deformations more than the permissible limits: the difference in the elevations of the base is more than 2 cm, the heel of the foundation is more than 5 cm, or its total settlement is more than 10 cm.
Structural horizontal reinforcement aerated concrete masonry is carried out with reinforcement A400-A500 (A400C-A500C). The total cross-sectional area of the reinforcement should be at least 0.02% of the area of the reinforced section of the masonry.
Calculation example: when reinforcing a blank wall 3 meters high, made of aerated concrete blocks 30 cm wide, the cross-sectional area of \u200b\u200bthe wall will be 3000 mm x 300 mm \u003d 900,000 mm 2. We determine the required cross-section of the armature: 900,000 mm 2 / 100 x 0.02 \u003d 180 mm 2. Reinforcement is carried out in height increments of a maximum of 1 meter, which means that at least 6 reinforcement bars will be needed. We determine the required section of the reinforcement according to the table (for 6 rods). Reinforcing bars with a diameter of 6 mm or more satisfy the conditions.
With an increase in wall thickness, either an increase in the diameter of the reinforcement or more frequent reinforcement will be required.
When structural reinforcement of aerated concrete walls, reinforcement is placed either in horizontal mortar joints or in concrete belts parallel to the horizontal masonry joints. Concrete belts are arranged in strobes with a section of 2.5 by 2.5 cm, which are cut with a manual chasing cutter (no dust, but hard), an angle cutter (easy, but with dust clouds), or an electric professional chasing cutter (fast and almost dust-free, but expensive). Strobes should be located no closer than 6 cm from the edge aerated concrete block. Before laying the reinforcement, dust is removed from the strobe, the strobe is loaded until the color changes, then (approximately 2/3 of its height) plastic cement mortar or glue for aerated concrete, after which reinforcing bars of variable diameter are embedded in the solution. Although calculations based on the requirements of STO NAAG 3.1–2013 indicate the possibility of using reinforcement with a diameter of 6 mm, some manufacturers of aerated concrete (H + H) recommend using reinforcement d8. In order not to resort to calculations, you can remember that on walls made of aerated concrete blocks with a thickness of 25 cm or more, two rows of reinforcement are installed along the edges of the masonry (at a distance of at least 60 mm from the outer surface of the blocks in the masonry), and in walls with a thickness of 20 cm or less - one reinforcing bar with a diameter of 8 mm, located in the center of the wall. According to modern requirements for maintaining the structural integrity of buildings, they would like one reinforcement belt to be continuous (made inseparable or with
The construction of houses from aerated concrete is one of the most used construction technologies. Such popularity is associated with high technical and operational characteristics of the material, combined with a rather attractive cost. When carrying out masonry work, it is mandatory to reinforce the walls from gas silicate blocks. This procedure ensures the strength of the entire structure and the ability to withstand the impact of negative factors. external environment. Let us consider in detail the entire process of strengthening the structure during its construction.
Why is it necessary to reinforce
The need to reinforce masonry from gas silicate blocks is associated with the characteristics of the building material itself. In addition to the low price, aerated concrete has a number of advantages that facilitate the construction and increase the comfort of further operation. These include the ideal geometry and block size, high vapor permeability, excellent thermal insulation characteristics, relatively low weight, and much more.
At the same time, aerated concrete is not without drawbacks. Having good resistance to compression, the blocks are vulnerable to strong tensile loads. As a result, uneven shrinkage of the foundation, local soil sedimentation, constant impact strong winds can lead to deformation of the structure, which, in turn, will lead to the appearance of fine cracks in the material. This will not affect the strength of the structure, however, it will reduce the level of thermal insulation and worsen appearance buildings.
In addition, the already mentioned vapor permeability is a consequence of the high hygroscopicity of aerated concrete. As a result of exposure to high humidity, the material may swell. Sharp temperature drops also contribute to the narrowing and expansion of the block array.
To eliminate the influence of all negative impact factors, multi-level reinforcement of gas silicate blocks is carried out.
Places of reinforcement
Modern technology for strengthening structures under construction provides for 5 main locations of reinforcing elements:
Reinforcement materials
Most often, metal reinforcement is used to reinforce gas silicate masonry, the dimensions of which depend on the place of application. When strengthening the walls, rods with a diameter of 6-8 mm are used to create an armored belt on gas silicate blocks according to the level of overlap, it is recommended to use products with a diameter of 10-12 mm.
An alternative material is galvanized metal mesh. The recommended thickness of steel bars used in this gas silicate reinforcement technology is 3-5 mm, and the cell square side is no more than 50 mm. To strengthen the supports of the openings, you can use a mesh with a larger cell - up to 70 mm.
In most cases, during the construction of walls, gas silicate blocks are reinforced with reinforcement. For laying steel rods, special grooves (strobes) are made over the entire surface of the row to be strengthened, into which metal rods are placed. The penetration cross section must be at least 25 by 25 mm so that the reinforcement does not protrude above the surface and is closed on all sides with an adhesive solution.
When reinforcing walls made of gas silicate in the corner zones, it is recommended to make the strobe rounded so that it is easier to bend the metal reinforcement along the radius. The bookmark must be planned in such a way as to avoid joints of rods in the corners of the building.
Works are carried out according to the following technology:
- preliminary marking is carried out along the entire perimeter of the laid row;
- using a wall chaser or an angle grinder, a strobe is formed;
- a vacuum cleaner or an ordinary paint brush cleans the resulting cavity from dust and material particles;
- the surface of the resulting furrow is wetted and half filled with a solution or adhesive composition;
- reinforcement is being laid;
- the remaining space is completely filled with mortar to the level of the surface of the blocks.
Depending on the size of aerated concrete blocks, there are methods of laying and the diameter of the reinforcement used:
To avoid the appearance of chips in the building material, the distance from the strobe to the edge of the block must be at least 6 cm.
The second popular way to strengthen the structure under construction is to reinforce the walls of gas silicate blocks with a mesh. With this option, it is not necessary to make grooves in the surface of the material to lay the reinforcement. You can apply a layer of solution sufficient to completely submerge the grid. Galvanized metal is usually used to reinforce gas silicate blocks by this method. As an alternative, you can use a mesh made of basalt fibers, which is not inferior in strength to steel structures, or fiberglass (this material is only applicable when strengthening walls).
One of the modifications of the reinforcement of gas silicate blocks with a mesh is the use of galvanized metal strips with a cross section of 8 mm by 1.5 mm to reinforce the walls of the structure. In this case, laying is also carried out on a thin layer of mortar, there is no need to prepare channels for laying. It is important to ensure that the reinforcing layer is completely covered with adhesive. This will prevent moisture from entering the metal surface and the occurrence of corrosion processes.
The technology for erecting an armored belt on gas silicate in the area of \u200b\u200bfastening the rafters and the roof is somewhat different from strengthening the walls and resembles the method of pouring the foundation. Here, the method of monolithic filling of space with concrete with pre-installed metal structures is used. The order of work is as follows:
- by welding or fixing with ordinary wire, a metal frame of the desired size is formed from reinforcing bars;
- for better adhesion, pieces of wire rod, reinforcement or ordinary building nails are driven into the top row of blocks;
- a wooden box is fixed on both sides of the top row;
- the prepared frame is installed in such a way that the distance from the rods to the edge of the formwork is at least 5-6 cm;
- concrete is poured.
The filling of the armored belt is made one-time. Filling in several stages significantly reduces the strength properties of the belt and, accordingly, negatively affects the overall strength of the structure.
Required tool
Despite the scale of the work performed, the list of necessary equipment for reinforcement work is quite small and includes:
- wall chaser (preferably electric, since manual work takes a lot of time) or a grinder with discs for concrete - we equip cavities for laying reinforcement;
- a vacuum cleaner, a building hair dryer or an ordinary paint brush - we clean the furrows from dust and debris;
- measuring tool (level, tape measure) and construction cord - for preparatory calculations and marking.
When erecting the upper armored belt, you will additionally need tools for mounting the formwork: a screwdriver, a hammer and a screwdriver, as well as a disk for working on metal using the already mentioned grinder for cutting rods of the desired length.
Nuances of reinforcement
The process of building each house is unique in its own way, so it is impossible to foresee all the problems that arise in advance. Here are some typical recommendations, the observance of which will help during the construction:
- It is not recommended to use fresh or damp gas silicate blocks. They are easier to destroy and lose their strength characteristics.
- The surface of the row must be perfectly flat. Irregularities and protrusions are easily eliminated with sandpaper or a grinder.
- Strengthening the external and load-bearing walls is a must.
- When reinforcing openings, reinforcement is wound up at a distance of at least 90 cm in both directions.
Aerated concrete - quite common today construction material. It has a minimum cost and has excellent performance properties. Houses are built from it, inside which it is possible to create an optimal microclimate. Such buildings usually do not require additional thermal insulation. However, in order for the building to be durable and reliable, it is necessary to provide for the reinforcement of its walls.
These works are carried out according to state standards 5781-82, which provides for the number of reinforcement bars in the amount of at least two. These blocks are used for low-rise construction where there may be doubt about the strength of the foundation. After all, it gives a drawdown over time, and this is reflected exponentially on the walls. The material cracks over time. Therefore, before building a house from aerated concrete blocks, one should consider the technology of laying metal reinforcement.
What does it give
If we take into account the deformation properties, as well as the fragility and tendency to cracking of aerated concrete blocks, it is imperative to reinforce the walls from the described material. The reinforcing cage is located at the level of overlap to ensure uniform distribution of vertical loads.
During the construction of the wall, longitudinal strobes are made on a number of blocks, the diameter of which will correspond to the diameter of the metal rod. This is where the fittings are placed. Such a measure is usually taken for each row. This approach eliminates cracking of the blocks and preserves the integrity of the masonry. If you follow state standards З1З59-2007, then the walls of aerated concrete should have a height of no more than 20 m or 5 floors, with regard to load-bearing structures. If we are talking about self-supporting walls, then their height should not exceed 9 floors or 30 m, respectively.
Reinforcement features
Reinforcement of aerated concrete blocks must also be carried out in private housing construction. In terms of chemical properties, cellular autoclave blocks are close to heavy concrete, however, aerated concrete has a rather weak alkaline reaction, and it varies from 9 to 10.5. This is due to the fact that the structure has a high porosity. This factor weakens the protection of metal reinforcement from air and moisture that penetrate into the masonry. This is one of the main differences between cellular concrete and dense. Therefore, the reinforcement of aerated concrete blocks must be accompanied by the laying of insulation in the form of a cement-sand mortar or glue. In the dry parts of the building, such insulation is not provided, this applies to partitions.
Whatever the masonry, it is subjected to three types of loads. For this reason, the instruction, which you can find in state standards 5781-82, provides for the presence of transverse reinforcement, which guarantees the strength of the structure in terms of tearing, stretching and breaking. If the step from one floor to another is more than 3 m, then the reinforcement should be carried out in two levels in height. If we are talking about a conventional structure, where the step between the floors does not exceed 3 m, then the reinforcement of the masonry is carried out only in the window sill zone.
However, if all the walls are deaf, then the height should be divided in half and the bars should be installed at this level. When reinforcing aerated concrete blocks, it should be borne in mind that the latter can be ordinary or tray. Tray ones have seats, while in conventional products you will have to ditch the holes yourself. Cement-sand or adhesive mortar is poured there. Only then can you start laying the reinforcement.
It is very simple to form a strobe on your own, because the stone has a porous structure. But during the cutting process, chips may occur, so 60 mm must be retreated from the edge of the block so as not to split the wall. For load-bearing reinforced lintels, it is recommended to use tray blocks in the form of the letter P. If you lay them out in one row, they form a long tray, where it is very convenient to lay reinforcement on a pre-filled mortar.
Reinforcement of aerated concrete blocks should also be carried out in cases where the thickness of the partition does not exceed 200 mm. In this case, one rod can be dispensed with, which is located horizontally and has a diameter ranging from 8 to 12 mm. If the height of the building is more than 1.5 floors, then the reinforcement should be two-row. Aerated concrete reinforced lintels can be rounded together with strobes, repeating their outlines. In this case, the rods should not have breaks.
If it turns out that the transition must be made in the place where the turn is, the reinforcement is displaced, and an insert is made in the center of the span. You can tie the reinforcement at the corner with wire or special steel soft wire. Sometimes the reinforcement of aerated concrete blocks with reinforcement involves the use of gas or electric welding. However, this method takes a lot of time compared to tying seams, so it is not very convenient.
Work methodology
Reinforcement of rows of aerated concrete blocks is necessary if the walls are of impressive length, since they are characterized by high windage. They will be subject to lateral wind pressure. All this can cause cracking of the masonry under the influence of bending. In addition to the window sill area, it is necessary to reinforce the first row of blocks with reinforcement, because they will carry the lateral and vertical load from the ceiling and wall. For this, an A-III rod is used, the thickness of which is 8 mm.
In special cases, it is permissible to use reinforcement with a diameter of 6 mm. For maximum protection of the masonry from the occurrence of cracks under loads of various nature, reinforcement is carried out on the first, every fourth row, without taking into account vertical reinforcement, which is performed in areas prone to earthquakes. It is important to achieve seismic stability. Vertical reinforcement will depend on the degree of risk. In this case, before the construction of the building, an order from the relevant authorities must be obtained.
What else you need to know about reinforcement
In autoclaved blocks, diamond drilling is permissible only in cases where the drill cannot collide with metal bridges. If this feature is not taken into account, then the drill may break. It is important to keep this recommendation in mind when using diamond wheels that may collide with rebar. If you want to cut concrete together with bars, then you should purchase an abrasive disc designed for cutting reinforced concrete.
mesh reinforcement
Reinforcement of masonry from aerated concrete blocks can be carried out by one of two methods, among them:
- laying a monolithic belt;
- reinforcement of masonry with reinforcing mesh.
Both methods are aimed at increasing the deformation resistance of the masonry, but they do not affect the bearing capacity of the walls. Inter-row reinforcement can be performed with a wire mesh, the thickness of which is 3 mm. You can use strips of galvanized steel, while the cross section will be 8 x 1.5 mm.
Gating is not required if the reinforcement is carried out with strips or a mesh, because the embedded products have a minimum thickness, which reduces the laboriousness of raising the walls of the building. Reinforcement of aerated concrete blocks with mesh may involve the use of material with a cell size of 50 x 50 mm. In this case, the thickness of the wire will vary from 3 to 4 mm. Gating should be abandoned, but a layer of glue should be applied to the surface of the gas block, forming a thickness ranging from 2 to 3 mm. When laying the mesh, its edges are removed from the ends by 5 cm. A second layer of glue is distributed on the surface.
Advantages of fiberglass reinforcement
Reinforcement of aerated concrete blocks with fiberglass reinforcement has been carried out more and more often lately. This fact cannot be called an accident, because the described material has many advantages, namely:
- low weight;
- high resistance to corrosion;
- mechanical strength;
- high resistance to aggressive environments;
- the possibility of operation in any climatic zones;
- the possibility of easy transportation;
- ease of installation.
Features of reinforcement with fiberglass reinforcement
Fibers for reinforcement must be cut with a grinder into separate blanks of the desired length. Knitting, if necessary, is carried out with plastic clamps. This technology allows reinforcement to be carried out quite simply and quickly. The operation does not take long. When working with fiberglass, you must use special means protection, it can be gloves and a protective mask.
Reinforcement allows you to build walls that will remain radio-transparent. For electromagnetic waves, they will not become an obstacle. mobile connection it doesn't get worse. Fiberglass is inexpensive, which does not negatively affect the overall cost of construction. In addition, the fibers do not conduct electricity.
Strengthening the first row
The reinforcement of the first row of aerated concrete blocks is carried out, as well as the reinforcement of every fourth row. To do this, strobes are made in the products, if they are not provided by the manufacturer of the products. The embedded surface should be cleaned of dust and filled with glue. In order to bend the reinforcement at the corners, you should use manual fixtures. The reinforcement should be pressed in so that it is covered with adhesive. From the outer surface of the block, the element should be removed by 6 cm.
Conclusion
Reinforcement of aerated concrete blocks with mesh or reinforcement is mandatory under window openings. The reinforcement should extend beyond the opening by 90 cm. If possible, this value can be increased to 1.5 m.