The foundation wall blocks are products made of heavy, dense silicate and clay concrete species, intended for the construction of national bases, basement walls, base and arrangement of the underground. They are advised to buy, if necessary, quickly installing underground structures, according to the strength characteristics and carrier abilities, they are inferior only by monolithic w / b. Scope of application includes as a private low-rise constructionand high-altitude houses.

The FBS has a solid rectangular cross-section and loops that facilitate the process of transportation and laying. They are designed primarily for weight loads, not reinforced, according to GOST 13579-78, the metal is used only for mortgage elements. High strength indicators are achieved by using heavy concrete varieties (from 1800 to 2400 kg / m 3, depending on the brand) and the sealing solution when filling. Dimensions along with other parameters are also regulated by GOST 13579-78.

Deviations from design dimensions can not exceed ± 13 mm in length and ± 5 in height and width, good geometric accuracy of the FBS is considered their important advantage to avoid errors in the construction of structures. The weight is not regulated, in contrast to the minimum permissible density of the building mortar. In practice, it varies from 0.25 to 2 tons and is necessarily taken into account when calculating the number of blocks loaded into the car for transportation, and when checking bearing abilities.

General performance includes:

• The class of concrete strength on compression, the minimum permissible value is B3.5 in the FBS from the ceramzite concrete, B12.5 - in dense silicate, the upper limit is B15. On average, this corresponds to from 100 to 200 kgf / cm in the blocks themselves.
• The proportion is up to 2400 kg / m 3.
• Frost resistance - 50 cycles.
• Waterproof - from W2. If it is necessary to enhance the hydrophobic properties, the surface of the products is processed by the corresponding compositions.
• Durability declared by manufacturers within 60-120 years.

Features of the use of blocks

Laying is carried out on a soil or pre-prepared sandy ground, to important requirements of technology include the absence of snow or water at the bottom of the trench. The size and weight of the foundation blocks exclude the possibility of their independent installation without the use of lifting equipment, even before the start of construction, it is necessary to make sure that there is a convenient entrance. The first set the corner elements of the masonry, including the inner partitions, they perform the role of lighthouses for other rows and, as a result, need to be careful checking the level and markup. Vertical and horizontal seams are tightly filled with a solution, the FBS is placed with a displacement, ideally half, but not less than 25-60 cm.

Moving and lowering is carried out with a lifting crane, before the start of work, check the state of the loop, they should be free from concrete. At the preparation stage, the surface of the products is cleared of dirt and lightly wetted. In order to save it, you can purchase foundation blocks without loops (manufactured by agreement), but their lifting and laying will be impossible without the use of special seating equipment. The need for the strengthening of the ribbon metal depends on the height and purpose of the construction of the structure, each second row is reinforced during the construction of basement walls.

The minimum thickness of the horizontal layer of concrete is 15 mm, the vertical seams are filled from two sides and cleared. Important requirements include the sealing of the solution when filling the seams, the voids are fraught with the displacement of the base or base during operation. All holes for communications are thought out in advance and laid at the installation phase. To enhance the durability of the construction erected, all joints are processed by hydrophobic compositions, by analogy with the monolithic reinforced ribbon, the upper row was waterproofing. In order to eliminate the risk of low-quality products, the presence of a passport is checked, including the props of the manufacturer, labeling, release date, the main performance confirmed by laboratory tests and the standard number.

Cost of FBS blocks

The size and cost are inextricably linked, they vary from 500 rubles in good products up to 4000 in large-sized. Maximum demands have FBS 24.4.6, optimal, if necessary, quickly mounting a collection of bolt basement or basement walls.

The magnitude of the rates is influenced by the concrete brand, the construction region (the closer the manufacturer, the lower the cost of delivery) and the manufacturing technology.

Prices for blocks obtained by accelerated platforms are lower than those cast in finished forms, a small sediment is inherent. Another criterion is the method of used drying: the steamed costs are expensive, the vitrate strength is variable. The latter is due to the urgency of the execution of the order, which improves or deterioration of operational characteristics, many builders give preference to the products that harden exactly 28 days.

You can stumble upon a foundation with the mysterious abbreviation of the FBS. It sounds beautiful, but many do not know how this designation is decrypted and what it means. We will try to figure out what it is where this type of foundation is applied and how to build it.

Foundation block wall - That is how these three letters are decrypted. And apply to the rapid creation of the foundation. The main features of this building material are that with it can be created reliable foundation team or basement floor from FBS blocks in very short time.

In fact, you just need to lay out products on Earth, connect them between themselves, concrete joints and all - the foundation is ready. He does not need to be set for a durability, no formwork installation is required.

The disadvantage of such a design is the joint between block elements. It is for this reason that in those places where the soil is poured, the use of the FBS is not recommended. Much more reliably make a monolithic ribbon foundation, swallowed below the friction point or make a slab version of this design.

The second negative point of use of the FBS is their big weight. For this reason, to collect the foundation from such blocks is necessary with the use of special equipment. For example, crane or on the extreme case of an automator.

As a rule, they are manufactured at the plants Ruby and after that they fall on sale. Thanks to industrial production,sizes foundation blocksmay have different. Plants specialize in the production of such products and have all the necessary forms and equipment.

The second option of manufacturing FBS more kustar. It uses a special pressing machine. A ready concrete is falling asleep to the unit, after which it automatically doses his flow to the vibroform. Next in the car installed a mortgage (Special loops for which the crane raises) And the technique will compare it into the future block, while performing oscillatory movements. After that, the unit removes the form and moves to another place.

An important feature of such production is the need for a large production room, since the speed of the technique is quite high, which makes it possible to produce a large number of products in a short period of time.

What are there (sizes)

Based on the title, the main purpose of the FBS, is the manufacture of the base and walls of the house. Regulates the size of the FBS blocks of GOST 13579-78. According to this regulatory document, the size of the foundation blocks may be:

• height H- 0.3, 0.6 mm;
• width B - 0.3, 0.4, 0.5 and 0.6 m;
• length L - 0.6, 0.8, 0.9, 1.2 and 2.4 meters.

FBS block, photo

Tip: If the purchase it was found that the size of the FBS block differ from the above, then it is worth thinking before buying such a material. Probably he was produced by Kustarino and his quality causes suspicion.

Marking

Each type of product according to GOST 13015.2-81 has its own unique labeling in which encrypted fBS size block and concrete brandFrom which it is made. For example, the FBS 24-6-6 T, where the letter "T" denotes that it is made of heavy concrete.

There are several varieties of concrete FBS, which are designed to perform of various types Tasks. Main species, this is:

• FBP (fundamental void);
• Udb (unified hole blocks)

For what purposes can apply

The FBS is very often used in the construction of foundations and basements of multi-storey residential buildings, as well as during the construction of zootechnical structures, such as cowners, pigsties. In private house-building, they are rarely quite rare, since it is necessary to use heavy technique, each hour of which is paid separately. If necessary, you can build a block foundation for home.

What is the foundation cheaper, monolithic or from the FBS?

When using FBS units, such foundation will be significantly cheaper and faster. When buying it is worth paying attention to their quality and it is desirable to know their former installation location. In the USSR, they loved to build various chemical warehouses.

Installation

Assembling block foundation, like everyone else, begins with marking and trench preparation. The markup is carried out in the same way as they place, in fact, it is the precast ribbon foundation.

To determine the width of the future trenchYou need to know the width of the blocks and add to it for twenty centimeters on each side. Such a gap is necessary for the reason that in the process of assembling the foundation builders, with the help of scrap, adjust the exact installation of the FBS, and for this it is necessary to have a little more space than the width of the foundation designs.

Tranche depth Selected depending on the type of soil. If the soil is clay, then it is necessary to burst the foundation below that level to which the earth is preserved.

After the preparation of the trench is manufactured sand pillow. The thickness of the sand layer with rubble, provided that the ground is poured, can reach 30-35 cm. For normal soil, 15 cm is enough. After the pillow is made, you can start installing blocks.

FBS blocks are installed each other around the perimeter of the future structure. The joints of the joints are closed with concrete solution. In that case, if it is necessary to build a foundation in the form of the walls of the basement, set them to each other you need a rotational, according to the principle of brickwork. Outside and inside the joints are maintained by plastering for better sealing.

After the assembly of the foundation from the FBS is carried out, proceed to it. For the insulation of this type of foundation, any available materials can be applied, but it is better to use. If necessary, such a foundation can be additionally. At the junction of walls and foundation it is necessary to pave waterproofing material

Output

FBS -Naid and strong material that is convenient to use in the construction of multi-storey houses. But if necessary, the manufacture of the foundation for the private structure is better to use others, since the independent installation of the FBS blocks is impossible due to the large weight of these products.

In the event that it was still decided to build a block foundation, its markup and the preparation of the pillow is made similarly how it prepares it for a belt foundation. Also, for this type of base, you can use everything that are used for a belt base.

Useful video

Laying FBS blocks on the video below:

In contact with

If you need to quickly make a durable and durable foundation, it is easiest to use ready-made elements - FBS blocks. I will tell you the basic information about this product group so that you can find the perfect option for our construction site.

Product parameters and features of their choice

At first I will tell you what the indicators should be taken into account before the acquisition of the elements, and then we will analyze their main types.

Always clarify whether the products correspond to the requirements of GOST 13579-78 "Concrete blocks for basement walls. Technical conditions. "

Factors affecting the choice of blocks

To begin with, we will understand which aspects should be taken into account before the start of work:

• The type of soil on the construction site. If you have clay soil, large-sized elements should be used, and if more reliable sandy, then you can do the middle options. That is, you need to clarify this nuance in the landowing service if there is no data, it is recommended to conduct an examination to get a conclusion;

• Wall thickness and overlap. Many believe that this block parameter should be the same as in the walls. In fact, the wall can play the foundation plane at a distance of up to 100 mm. If the design will perform with the outer, and from the inside, the maximum removal should not exceed 60 mm;
• Weight of the structure. Also important aspect, After all, without knowledge of the projected load it is difficult to make a specific choice. That is, you must decide in advance with the project to calculate the overall weight of the design;
• Still length. Another important criterion that should be considered when selecting block parameters. The optimal indicator is 4-5 blocks on the wall length. This means that 10 meters it is better to use 4 blocks per 24 decimeter than 8 blocks by 12 decimeters;
• Laying scheme. So that the seams were bandaged as reliable as possible, and the elements were located tightly to each other, blocks should be selected different sizes Under each base. If you have windows, they should also be provided in the diagram.

Draw a diagram on a piece of paper. This will help to visually see the future design and will greatly simplify the settlement work.

Parameters blocks

To begin with, we will understand the basic parameters of products:

Illustration	Description
	Length elements. According to GOST, there are three products options - at 780, 1180 and 2380 mm. They are called correspondingly, medium and small. Deviations are not allowed if you are offered another sizes, it means that this product does not meet the established standards.
	Height. There may be two options - 280 and 580 mm. The first type of product is common, since it has a low carrier load, but its price is almost the same as strong options by 580 mm. The photo shows the second type blocks.
	Width of products. It can be 300, 400, 500 or 600 mm, the photo shows exactly the last option. The choice of a specific solution depends on the thickness of the walls and the load on the structure.

Foundation blocks are measured in decimeters. And the value is rounded into the biggest. For example, the product size of 2380x500x580 mm in the manufacturer is denoted as FBS 24.5.6.

Now we will analyze the main sizes of products and their weight, start with large articles.

Prices in the article are relevant in the summer of 2017

Middle options have such parameters:

Small blocks have such characteristics:

If you decide to make a house from the FBS blocks, more precisely, to build a foundation for it, then you need to consider several important recommendations:

• Transportation is always calculated separately. It is worth considering this article of expenses and agree in advance when you will deliver blocks. When unloading is desirable to be present on the site so that the products are unfolded where it is convenient for you, and not where it fell;

• Work impossible to spend their own hands. All elements are very large, so in any case you will have to attract a lifting technique. Agree in advance this aspect and ensure the crane of the crane to your site. If the soil is clay, then you need to pick up a period without precipitation;

Swipe all preparatory work in advance so that the crane worked without stopping. So you will save considerable money on renting a lifting machinery, because the cost is calculated in hours.

• Instructions for laying simple. A sandy-gravel pillow is made, after which the first row of the foundation is put on it. Subsequent ranks are put so that the seams are tied up, a cement solution is applied for reliability, the thickness of the seams should be as small as possible.

Output

Now you know all the information on the FBS and can easily choose the optimal product option for your foundation. The video in this article will help even better figure out the topic, and if something is unclear to you - ask in the comments.

If you want to express your gratitude, add clarification or objection to ask the author - add a comment or tell me thanks!

The article tells about what is concrete blocks And what makes such structures. FBS is a concrete rectangular block, the framework of which is firmly fastened with reinforcement from steel A-1 or A-111. The area of \u200b\u200btheir use is very wide. They are used in the construction of premises for various purposes, basements, belt foundation, overlaps.

Select FBS suitable for your purposes is not difficult if you look at some product features.

FBS blocks: GOST, labeling and price

There are different foundation blocks. The price of a piece depends on the purpose of the reinforced concrete product:

• solid section - basement construction;
• hollow - the construction of walls.

There are several class of product strength, for the convenience of marked with numbers and letters. Decoding Designations are simple - for example, marker 24.6.6. Means the approximate length of 2400 mm, width of 600 mm and a depth of 600 mm. The main characteristics that determine the concrete structure: price, weight, size according to the standard, the volume of the progress, etc. The price is changing depending on the size of the product - from 330 to 3260 rubles. a piece.

The release of these concrete structures is regulated GOST 13579-78. We give the table labeling product and dimensions.

Choosing a standard building material on household building, keep in mind that price for one average does not exceed 1000 rubles.

foundation block solid

Rates for mounting

It is not difficult to understand that installation of FBS It is pretty difficult to consider what efforts and costs will have to be attached. It does not matter whether you build a house, perform installation for a ribbon foundation or under the ground floor - the correct laying of the structures is guaranteed only from professionals. On average, the cost of installation, like other reinforced concrete products, fluctuates by region - from 500 rubles. In Novosibirsk to 1500 rubles. for installation in St. Petersburg.

We give the average rates of some installation work on the territory of our country.

Foundation from FBS blocks: pros and cons

If you are leading construction of foundationThe foundation blocks can be used here. solid heavy concrete, Proper to become a solid foundation of the built building. By examining the pros and cons of the foundation from the FBS blocks, we note:

• saving time and resources to build
• no formwork
• high quality of the execution of concrete structures themselves
• resistance to temperature drops
• applicability almost on all types of soil
• simplicity and convenience of assembly

• the possibility of sending a part of the foundation due to soil service in some places
• the complexity of the cutting of such a design to smaller pieces
• the need to use special equipment, especially with large sizes

IMPORTANT: Positive and negative qualities of block foundation are relative, since everything determines the ground, competent installation and the very terrain of the development.

How to make a foundation from the FBS: Step-by-step instructions

Now let's talk about how qualitatively to perform the foundation from the FBS blocks. Step-by-step instruction divides the installation process into four main stages:

1. Design and selection of material.
2. Earthworks, dumping sand pillow.
3. Installation.
4. Waterproofing.

Designing is better to entrust the specialist. It will not allow to be mistaken in the choice of reinforced concrete materials, having received the desired properties Block on the existing soil, without excess load on the ground. Certain parameters of the structure of the structure are also taken into account. In the lower row, the blocks of 400 mm wide are usually selected, and the following rows are 300 mm.

At the earthfore, it is necessary to dug a given depth of a given depth, below the soil freezing point on the site. At the bottom of the trench sand pillow with a thickness of 30-40 cmfor laying the blocks themselves. The main thing is to comply with an equal level of the sand layer all over the pit. This will avoid base distortions during the installation process.

When laying Used conventional cement mortar not below M100. If reinforcement is required, then on top into one layer laid from 2 to 5 rods. Reinforcement gives the design additional strength with minimal costs for the rods itself.

For waterproofing Ruberoid is stacked or its analog is always over the top row. Soft roofing here. All laying on the sides is failed by mastic. It is important that the waterproofing layer closes the block from all sides. So he will serve much longer.

Video: Foundation from the FBS

The following video fragment allows you to get a complete idea of \u200b\u200bthe correctness of the installation of the foundation from the FBS.

Is it possible to build from used blocks for savings?

Many builders are asked by this issue - is it possible to build a structure, a foundation or other construction of a used material? Important to remember, what FBS - Pretty Durable and Durable Designwhich is not afraid of sudden temperature drops, resistant to various mechanical damage and, most importantly, is not exposed to a strong devastating effect on the side of the soil.

Due to the re-edge of the Used FBS, its value is significantly reduced, which cannot be said about its strength. Therefore, if you choose to build a used product, there is no doubt in such a choice.

physical characteristics

TO physical characteristics Concrete structures include parameters such as volume, weight, length, width, product height. Another parameter when choosing is the price. These properties were presented in the table above.

Other parameters characterizing the progress are:

Production

In the production of FBS mainly used heavy concrete, silicate concrete middle degree density or ceramzite concrete.

• First, the components mixed by proportions are falling asleep in special Bunker S. Moisturizes to the required level.
• Depending on the required strength determined volume of binder ingredient Water and mixtures.
• Then in special production forms The mixture obtained at the previous stage is poured, which is undergoing further seal.
• The whole process is carried out on established regulatory indicators. For sealing serve special vibropresses, and to dry the resulting semi-finished product - a protruding camera of materials.
• With specified degrees of humidity and temperature concrete gradually gains the necessary strength.
• Production of marking 4-4-6, 24-4-6 carried out with complianceGOST 13579-78.

Construction of the foundation basis - the event is responsible, since this element accounts for a total load from the walls above. Prefabricated foundations are allowed to erect from the FBS blocks, but the material you purchased should differ in good quality. Today we consider in detail what the FBS stones represent their characteristics and scope of use.

What is FBS

So what is the FBS?

Decoding "FBS" means - the foundation blocks are solid. When you meet the options "wall" or "construction" - know that this is an incorrect interpretation of the abbreviation.

They are presented in the form of products from the concrete of heavy, clay and dense silicate varieties. The main purpose of the blocks of foundation concrete is the construction of the bases of the collection type, the walls of basements, basement sites. The FBS concrete blocks are recommended if needed in the operational erection of underground construction, which is capable of only monolithic reinforced concrete constructions with its main characteristics and carrier capabilities.

Concrete blocks for the foundation are designed for the construction of small objects, use both for the construction of multi-storey facilities. The foundation from the FBS is perfectly withstanding the load exposure and ensures that the house will be strong, even if certain errors will be allowed during construction.

Blocks for foundation from reinforced concrete are manufactured. Their base is a concrete solution, reinforced with steel reinforcement, which turns it into a reliable option for making installation.

Standard FBS blocks are characterized by formams of parallelepiped. The main advantage is that the foundation from concrete blocks is erected much faster, financial costs are reduced. As follows from numerous consumer reviews, the foundation blocks allow you to evenly distribute the load on the basis of the object, erect strong and frost-resistant walls.

Specifications FBS

A concrete solution is used to produce stones, the density of which is 1 800 - 2,400 kg per cubic meter. The category of the mortar mixture of FBS blocks for strength for certain brands of concrete is:

• more than B7.5 - concrete M100;
• not lower than B12.5 - M150;
• heavy concrete - B3.5 (M50) - B15 (M200).

Resistance to low temperatures of block stones in accordance with the requirements of guests should be more than fifty cycles of "freezing - thawing", the moisture resistance rate is W2.

The thermal conductivity indicator of the blocks leaves much to be desired, which is quite natural for such raw materials, like reinforced concrete.

With the designation of the foundation block, its parameters are specified in "DM", rounding is performed upward. In addition to the size of the FBS, the labeling of the FBS blocks provides for the designation of the type of concrete material:

• "T" - heavy;
• "P" - clay (with a porous basis);
• "C" is silicate.

For example, the block is marked with FBS-24-4-6 T. - This means that the size of the unit is 2 380 per 400 per 580 mm, the solution of a heavy brand was involved in the preparation. The stone is marked and in other ways: 24-4-6T; 24.4.6t; 24 4 6t.

The mass of blocks according to GOST begins about 260 kg. This means that during construction for such a material will have to attract a special technique. For the construction of residential facilities, it is preferred to use small foundation blocks whose thickness is 0.6 meters. Weight of such a sought-after material - 1,960 kg.

In the manufacture specifications FBS blocks imply permissible errors from dimensional standards: in length - no more than 1.3 cm, in width and height - up to 0.8 cm, by cutting - up to 0.5 cm.

Before buying supporting concrete blocks, the mass and dimensional parameters are checked in obligatory. When the weight is lower than the marking "T", there are volatile plots in blocks, the concrete is poorly compacted, which will have a negative effect on its strength. Similar stones to create a foundation from concrete blocks is not recommended. The foundation blocks, cast by their own handicrafts, in most cases will not correspond to the FBS production technology, and the application can create unpredictable consequences.

At the stage of manufacturing the foundation blocks, a device for special metal lyms, located on top, is provided. It is used for this steel or periodic metal products. As needed, there is the possibility of ordering small foundation blocks without hinges for mounting. Their standard sizes are defined by GOST.

The surface of the blocks may provide finishing materials. Such a feature is inherent in certain types of FBS. The remaining types of foundation blocks are distinguished by the smoothness of the surface, the absence of cracks.

Plants produce block material under the labeling of the FBP. It has vigilant areas opened to the bottom. There is also a variant of the block stone of the FBV. This means that the material provides cuts for laying communication lines.

GOST, determining the production process, as well as technical indicators of block stone, their dimensions are established:

• length - 2 380 mm; 1 180 mm; 880 mm - for challenges;
• width - 300 mm; 400 mm; 500 mm; 600 mm;
• height - 280 and 580 mm.

The small-sized elements are manufactured, the sizes of which in length are 40 and 60 cm.

The main sizes of the FBS blocks are listed in the table:

In the manufacture of material, forms for foundation blocks are used.

Scope of use of blocks

Common base blocks are used in the construction of foundation bases and bearing walls. It is considered their main purpose. In addition, block stones are erected retaining walls, Outacades, bridges, ramps, use them for the device of fences. In a private residential sector, you can find a cellar made from foundation blocks.

We give a description of the main use of this building material.

Foundation

The structure of the foundation from the FBS blocks is allowed on those soil areas that are suitable for the construction of precast tape foundations from the FBS blocks. Well, if the soil turns out to be rocky or sandy. In weaker soil areas, erecting two regular blocks, arrange Armopoyas - filling of the monolithic ribbon to the FBS blocks on the reinforcement frame. In addition, the specificity of construction from the foundation blocks on such lands is provided for the device of the reinforcing belt throughout the bottom of the pit to the removal of the first row. After that, the sand pillow under the FBS blocks is satisfied.

According to a minor soil, it is allowed to build a discontinuous foundation foundation. Such a feature saves material and financial resources. In such foundations there are volatile places between the blocks, which are further falling asleep with soil and trambed.

This option for the construction of a foundation from foundation blocks is possible only in areas that differ in a reliable bearing opportunity. Pre-calculations are performed, in which the distance between the stones should not exceed seventy centimeters.

Such grounds, as well as foundations from blocks in one row, are erected under low-rise objects that are erected from building materials of light type.

In addition, on a plot with a weak soil composition, the first row can be laid out with the foundation blocks with the spyer (pillow). Such blocks are of greater width, increasing the base area. Between them leave gaps up to 0.7m, filled land. On the "reinforced" row laid solid blocks so that the suture sections occur on the material of the lower row.

The construction technology of the foundation from the FBS blocks has a feature. Experts advise to buy material with a maximum length to minimize the number of seams, thereby giving a fundamental basis good strength.

Benefits and disadvantages of material

In certain situations, the use of FBS blocks is much more convenient than the monolithic base device:

• the construction work is reduced - for the filled concrete solution, it takes time to frozen and the strength set - about four weeks. Block material does not need this;
• standard dimensions make it possible to quickly determine the need for blocks;
• there is no need to acquire material for formwork, reinforcing bars for frame base;
• it is possible to purchase ready-made FBS blocks on the desired size and characteristics;
• blocks are distinguished by a long operational period reaching hundred and more years;
• material from long-term operation is not subjected to deformation. From blocks, thick walls are obtained, characterized by resistance to mechanical damage.

The lack of one - the large weight of block material involves the involvement of special equipment for its laying, which significantly increases the cost of the construction of the foundation base.

In addition, some consumers indicate the high cost of block material as a lack.

Unused blocks

The Block material of the FBS is almost not destroyed, and often instead of the only purchased stones are allowed to mount the b / y blocks. They cost much cheaper, but their characteristics are practically no different from new analogues. But in this case it is necessary to estimate the destruction of concrete elements during operation, and it can only be done by the corresponding specialist.

What better blocks are used - each decides on their own. But it should be purchased only from proven manufacturers.

Conclusion

We looked at how to make a foundation from FBS blocks. The material really accelerates the construction process, is characterized by good strength and long-term operational period. In order for your base to be reliable and high-quality, it is recommended to buy blocks that meet the stated technical indicators.

During the construction of such a material, the basic installation rules should be followed and adhere to technology.