Heat-insulating plates from cellular concrete. Ceiling from aerated concrete slabs

According to the material of manufacture, the plates are divided into:

• reinforced concrete;
• aerated concrete.

Reinforced concrete hollow core slabs

This is the most popular and affordable type of plates.

Previously, the use of massive reinforced concrete floors was not available in the construction of a private house due to their high cost and heavy weight, requiring the use of special equipment for delivery and lifting. Now there are no such problems, and crane or manipulator have become commonplace in low-rise construction.

Hollow concrete slabs have additional relief in the form of through holes-chambers, and they themselves are made of heavy concrete grades with reinforcement, which provides the necessary rigidity and strength. Such an overlap has a number of undeniable advantages:

• Lightweight design compared to monolithic slab; voids significantly reduce the weight of the product, which means that they can be safely used in aerated concrete buildings up to 3 floors inclusive.
• High strength, which is provided by internal cavities, reinforcement and high-quality concrete. The bearing capacity of plates of this type is from 800 kg/m 2 .
• Simplified installation and the ability to mount on bases of any shape. The size of the slab can be 6 and 9 meters, which significantly expands the possibilities for planning.
• Internal cavities can be used to accommodate communications and wiring.
• Good soundproofing.

Device reinforced concrete floors will require around the perimeter. It can be made monolithic using formwork and reinforcement with a thickness of 10 mm or more. The width of the belt is not less than 150 mm - the distance on which the plate will rest. Due to this, the load on the walls is reduced, local stresses caused by the pressure of the upper floor and the slab itself are eliminated.

Marking

According to the configuration of the cavities, the plates are divided into:

• PC - with round voids, rests on 2 sides;
• PCT - with round cavities, based on 3 sides;
• PKK - with round voids, fits on 4 walls;
• PKT - with round cavities, mounting on 2 end and 1 long side;
• PG - with pear-shaped voids; thickness - 260 mm; support on 2 ends;
• PB - made without formwork, by continuous molding; its thickness is 260 mm, the hole diameter is 159 mm; the product is placed on 2 end sides.

According to the size of the cavities and the thickness of the plate, they are divided into the following types:

solid single layer:

• 1P - plates 120 mm thick.
• 2P - plates 160 mm thick;

multi-hollow:

• 1pc - slabs 220 mm thick with round voids 159 mm in diameter.
• 2pcs - slabs 220 mm thick with round voids 140 mm in diameter.
• PB - slabs with a thickness of 220 mm of bee-formwork molding.

Slabs of types 2P and 2PK are made only from heavy concrete.

Dimensions

The size of the hollow slab is included in its marking.

For example, PC 90.15-8. It's round hollow slab length 90 decimeters, width 15 dm. Permissible load for overlapping is 8 MPa (800 kgf / m2).

Under the spoiler are given standard sizes plates. To view, click on the heading "Table".

Plate type	Coordination dimensions of the plate, mm
1pc	From 2400 to 6600 incl. with an interval of 300, 7200, 7500	1000, 1200, 1500, 1800, 2400, 3000, 3600
1pc		1000, 1200, 1500
1PKT	From 3600 to 6600 incl. with an interval of 300, 7200, 7500
1PKK	From 2400 to 3600 incl. with an interval of 300	From 4800 to 6600 incl. with an interval of 300, 7200
4pcs	From 2400 to 6600 incl. with an interval of 300, 7200, 9000	1000, 1200, 1500
5pcs	6000, 9000, 12000	1000, 1200, 1500
6pcs	12000	1000, 1200, 1500
7pcs	From 3600 to 6300 incl. with an interval of 3000	1000, 1200, 1500, 1800
PG	6000, 9000, 12000	1000, 1200, 1500

More information can be found in the article about.

Support depth

It is important not to exceed maximum depth support. Otherwise, the slab will work as a lever, and under heavy loads, a slight lifting of the wall above the slab is possible. It is not noticeable to the eye, but critical to the structure. With loads from installed furniture, equipment and erected internal interior partitions possible cracks in the walls from the resulting stresses.

The length of support (the depth of insertion of plates into the walls) should not exceed:

• for brick walls- 160 mm;
• when supporting floor slabs on aerated concrete blocks class B3.5-B7.5 - 200 mm;
• when resting on a concrete armored belt - 120 mm.

The minimum support length is also normalized. It should not be less than:

• 80 mm - for brick walls;
• 100 mm - for walls made of cellular concrete blocks;
• 65 mm - when resting on dense concrete of class B10 and above.

Installation of overlap from reinforced concrete structures necessarily require the use of a crane or manipulator with a large lifting capacity. The weight of a standard 6-meter slab reaches 2 tons. In addition, installation will require certain skills. So alignment is carried out at the seams on the smooth side of the ceiling, after which the plates are fastened with anchors, and the joints are poured with cement mortar. Can be used as a heater mineral wool, Styrofoam.

Aerated concrete slabs

Not only are made of foamed concrete, but also interfloor partitions. This material has good strength, low thermal conductivity, it is easy to process and easy to use. Aerated concrete slab can withstand a load of 300 to 600 kg / m 2, and the maximum weight does not exceed 750 kg. The accuracy with which such a ceiling is made allows installation in a short time and does not require additional preparation for subsequent finishing. These are the lightest floor slabs for aerated concrete walls.

Now on the market you can find two types of such structures:

• They are made of concrete by autoclave injection molding, equipped with special elements of the tongue-and-groove type, which simplifies installation. With this method, the density can correspond to the concrete grade D500. This option is most in demand in low-rise construction.
• Standard panels, reinforced with reinforcing elements, can be used in any monolithic construction. Easily processed, inexpensive, well suited for non-standard solutions.

The maximum size of aerated concrete slabs does not exceed 5980 by 625 mm, and the thickness can be from 150 to 300 mm. Minimum length 2980 mm, pitch 300 mm. Such a variety of sizes and low weight makes it easy and with minimal loss to close the space between floors or any complex shape.

The slab should rest with its edges on the wall of the house by at least 10 cm, so the layout must be made taking into account this size.

The disadvantages of such an overlap follow of the features of the most cellular concrete, therefore, the choice must be approached carefully and after careful calculations of the bearing load and operating conditions.

• Aerated concrete is a very fragile material, which is practically devoid of elasticity. To avoid cracks in walls and ceilings, it is necessary to take care of a high-quality monolithic or well-buried foundation, which excludes any ground movements.
• This material perfectly absorbs moisture, and this will require additional waterproofing with a special primer in areas such as bathrooms and toilets. Reinforcement in the composition of aerated concrete must be processed in accordance with the requirements of SN 277-80, which guarantees the service life of the floors at least 25 years.
• The bearing capacity of less than 600 kg / m 2 is insufficient to accommodate heavy furniture and equipment and a large number of people. Screed, flooring, underfloor heating systems reduce the already low load capacity.
• Additional reinforced concrete beams will be required, laid through a distance in the width of the slab.

Comparative cost

When constructing interfloor structures, the issue of price plays an important role. If we compare all varieties with each other, we get the following sequence. Reinforced concrete hollow slab will be the cheapest with a cost per square meter at 1200 rubles. In second place will be a monolithic product - 2000 - 2500 rubles per square meter. The cost can vary greatly depending on the thickness and manufacturing technology.

The most expensive floor is a foam concrete slab - from 3,000 rubles per square. The high cost is due to the complex manufacturing technology and the small width of the plate.

Also, the cost of a slab ceiling should include the costs of transportation and lifting, which in some cases may be equal to their cost.

December 22, 2014 No comments

Lightening building materials leads to savings in construction costs. The lower the load on the foundation, the more economical the estimate. Initially, the unloading of the building was carried out through the use of lightweight materials for the construction of walls.

Modern technologies do not stand still, and aerated concrete floor slabs allow you to create an even lighter design from inexpensive materials. Slabs are close relatives of blocks. They were given the strength, ease and speed of installation of the known material.

Aerated concrete floor slabs - technical specifications

The weight of the product is approximately 120 kg. Of course, lifting it to a height manually is problematic. But a relatively small indicator makes it possible to use less load-bearing, and therefore expensive equipment. The light weight and integrity of the structure allow saving on the number of employees. It will take three people to install the plates.

The product is made of concrete grade D500, with autoclave exposure. This technology gives the material strength and durability of use. The concrete strength class in this case is B3.5. Plates withstand a load of 600 kg / m2.

For ease of connection individual elements a groove-ridge part is provided along the edges. The design fixes the position of the products and provides greater strength of the connection of the plates.

Types of aerated concrete slabs

According to the manufacturing technology of aerated concrete type slabs, there can be:

• autoclave;
• non-autoclave.

One of the significant differences for the consumer is the pricing policy. Non-autoclaved plates are cheaper. During their hardening, excessive energy consumption is not applied. Accordingly, the product gains the necessary strength on its own. The process takes longer, but the result, subject to all storage rules, is a high-quality and even surface. The disadvantage of such products is the concentration of gas bubbles closer to the surface. Also, the cells are arranged unevenly, which leads to uneven operation of the plate along the length of the surface.

Autoclave products are obtained by applying temperature and pressure. With this technology, not cement, but lime acts as a binder. The process can be compared to the formation yeast dough. In the mold, the mixture swells and, under the influence of temperature, seizes.

Foaming in the non-autoclave method occurs by introducing foam from chemical substances. It is she who creates the effect of aerated concrete.

Advantages and disadvantages of aerated concrete slabs

Every new material has both advantages of use and disadvantages of technology and installation. Let's start with the good. Aerated concrete slabs are light and practical. Overall dimensions of the product contribute to both easy installation, and transportation without special selection of the type of equipment.

The products are easy to mount due to the groove clearances. For the material, special adhesive compositions of increased strength have been developed.

The material has low moisture absorption. This facilitates its use even in showers and baths. The use of this type of overlap without consequences is possible at a humidity of 60-75%.

Aerated concrete products are very geometric. Their size and shape almost always perfectly match the GOST parameters. Perfectly vertical installation of the walls is also necessary for the evenness of the base. In case of distortions or defects, the plate can always be corrected with sandpaper.

Due to the pores, the material absorbs moisture in case of chips and surface defects. The base must be treated with moisture-proof solutions and plasters. The structure must be reinforced. Due to this, the rigidity of the building is achieved, and the bearing capacity of the floor is increased.

Aerated concrete is an artificial stone, which has recently been used in construction world. It has high thermal conductivity and strength, is light and easy to install, has found its application in the construction of partition walls and wall blocks. Due to the exact parameters of aerated concrete floors, an even and smooth coating is provided, which does not require subsequent finishing. Aerated concrete walls are prefabricated prefabricated slabs. The great demand for such products has arisen due to their environmentally friendly components that do not affect human health.

Where are they used?

Aerated concrete slabs are used in the installation of ceilings between floors of buildings, and also serve to build walls. Aerated concrete structures are used in the construction of houses, the height of which does not exceed three floors. For floors, aerated concrete blocks are used with technical specifications suitable for the weight of the vaults.

Advantages

• Aerated concrete blocks do not have dimensional errors. Thanks to this, the surface is smooth, which significantly reduces the cost of finishing buildings. But there is one condition - the walls must also be without reliefs, cracks and potholes. To get rid of defects, putty and grinding are used.
• Mounting an aerated concrete slab, you do not have to spend a lot of time, make great efforts.
• To the pluses this material include the lightness of the blocks, which during operation do not exert a load on the load-bearing walls of buildings.
• When installing aerated concrete elements, a small amount of auxiliary equipment is used.
• When using aerated concrete in the construction of houses with a small number of floors, take into account following characteristics material: strength, fire resistance, noise insulation, heat insulation and moisture resistance. The material is odorless, with environmentally friendly components.
• The advantage when working with aerated concrete floors is their convenience when installing balcony bases.

disadvantages

Main types

Foam concrete building blocks are autoclaved and non-autoclaved. The second type is the best in terms of price and quality characteristics. Using autoclave plates, you need to be prepared that after installation, during operation, they "age". In the production of autoclaved slabs of cellular aerated concrete, lime is used, due to which the materials harden as a result of pressure and temperature. In the preparation, cement is used as a binder, as a result, the hardening of the particles occurs naturally.

Floor slabs for aerated concrete are of the following types:

• monolithic;
• aerated concrete;
• wooden beams;
• reinforced concrete slabs;
• metal beams.

When using aerated concrete slabs, a reinforced annular belt is required.

The overlap of reinforced or aerated concrete is a monolithic structure consisting of grooves into which slabs are inserted. When working with aerated concrete slabs, they are laid on a reinforcing layer. At the same time, the reinforcing structure is treated with anti-corrosion coatings..

The sizes of the plates are different, but the main condition is that they should protrude 20 cm beyond the span. Prefabricated ones are also used, which are manufactured in factories; they are more economical than monolithic ones. Differ aerated concrete lightweight designs weight, which cannot be said about reinforced concrete.

Monolithic ceilings with a thickness of about 3 centimeters include a reinforcing mesh filled with concrete. Such designs of aerated concrete houses have different shape than are not similar to slabs. Single floors endure a large load, which is a plus, the disadvantages include their high cost and labor intensity.

There are also prefabricated monolithic structures, which include prefabricated aerated concrete floors, the top of which is reinforced.

Installed a couple of centimeters below the floors to avoid pressure and cracking. Aerated concrete floor slabs can act as door and window lintels. With a wall thickness of more than 5 cm, prefabricated jumpers are used, the length of which should be 1 centimeter more than the opening.

aerated concrete- this is one of the types of cellular concrete (along with foam concrete and aerated concrete), which is fake diamond with spherical pores 1-3 mm in diameter evenly distributed throughout the volume.

The main components of this material are cement, quartz sand and aluminum powder, it is also possible to add gypsum and lime. The raw material is mixed with water, poured into a mold and the reaction of water and aluminum powder occurs, leading to the release of hydrogen, which forms pores, the mixture rises like dough. After initial curing, it is cut into blocks, slabs and panels. After that, the products are subjected to steam quenching in an autoclave, where they acquire the necessary rigidity, or are dried under electric heating.

Finely ground aluminum powder (aluminum powder PAK-3) is introduced as a blowing agent. The gas generation method is based on the introduction of components into the raw mixture that are capable of causing chemical reactions with release into large quantities gas phase. Gases, trying to get out of the hardening plastic mass, form a porous structure of the material - aerated concrete, gas silicate, gas ceramics, cellular glass, plastic gas fillers, etc. Entering into a chemical reaction with Ca (OH) 2, aluminum promotes the release of hydrogen molecules and the corresponding energy of chemical bond formation from simple substances

The released hydrogen swells the cement paste. Cellular cement paste hardens. There is no large filler in it. To speed up the swelling process, approximately 10% fluff lime by weight is added to Portland cement. The process of gas formation lasts approximately 15 ... 20 minutes.

Another gas former is perhydrol (technical hydrogen peroxide). In the alkaline environment of cement paste or cement mortar perhydrol decomposes with the release of oxygen:

Oxygen molecules inflate cement paste or building mixture within 7…10 min.

Classification of aerated concrete:

• By appointment:
  • structural.
  • structural and thermal insulation.
  • heat-insulating.
• According to the hardening conditions:
  • autoclave (synthesis hardening) - hardening in a saturated steam environment at a pressure above atmospheric;
  • non-autoclave (hydration hardening) - hardening in vivo, during electrical heating or in a saturated steam environment at atmospheric pressure.
• According to the type of binders and silica components, they are divided into:
  • by type of main binder:
    • on lime binders, consisting of boiling lime more than 50% by weight, slag and gypsum or cement additives up to 15% by weight;
    • on cement binders, in which the content of Portland cement is 50% or more by weight;
    • on mixed binders, consisting of Portland cement from 15 to 50% by weight, lime or slag, or slag-lime mixture;
    • on slag binders consisting of slag of more than 50% by weight in combination with lime, gypsum or alkali;
    • on ash binders, in which the content of highly basic ash is 50% or more by weight;
  • by type of silica component:
    • on the natural materials- finely ground quartz and other sands;
    • on secondary products of industry - fly ash from thermal power plants, hydro-removal ash, secondary products of enrichment of various ores, ferroalloy wastes and others.

To give concrete a porous structure, the Czech Hoffman added acids, carbonic and chloride salts to cement and gypsum solutions. Salts, interacting with solutions, released gas, which made the concrete porous. For the invented aerated concrete, Hoffman received a patent in 1889, but he did not go beyond that.

In 1914, the Americans Aulsworth and Dyer used aluminum and zinc powders as blowing agents. In progress chemical reaction these powders slaked lime hydrogen was released, which contributed to the formation of a porous structure in concrete. This invention is considered the starting point of aerated concrete manufacturing technology.

The Swedish architect and scientist Johan Axel Eriksson tried to expand a solution of lime, silica components and cement by reacting this solution with aluminum powder. In 1929, in the town of Ixhult, Ytong began the industrial production of aerated concrete. The engineers of this company took as a basis the technology of heat-moisture exposure in autoclaves to lime-silica components, patented in 1880 by the German professor V. Michaelis. Only in the first year of operation, this enterprise produced 14 thousand m³ of aerated concrete (gas silicate). It should be noted that Eatong did not use cement at all.

A slightly different method for the production of aerated concrete was introduced in 1934 by the Swedish company Siporex. It is based on the use of a mixture of Portland cement and a silica component. Lime was not used in this case. The authors of this method are Finnish engineers Lennart Forsen and Swede Ivar Eklund. The scientific and practical achievements of the above engineers later became the basis industrial production both gas silicates and aerated concrete in many countries of the world.

The most important characteristics of this material are density, which provides high thermal insulation properties and lightness and strength, which provides high load-bearing capacity. One aerated concrete block, which takes up 30 bricks in the masonry, weighs less than 30 kg.

D500 aerated concrete blocks are the most the best option for building a floor in the reconstruction of housing Group III capital (capitality group "Ordinary"). Their use allows to achieve the necessary strength and high thermal insulation qualities of the fence during the construction of structures up to the 3rd floor.

It is necessary to distinguish between products made from autoclaved prefabricated aerated concrete and products made from other lightweight concretes (mainly foam concrete), not autoclaved. During autoclave hardening, all components of the mixture are involved in the binding process, so a new type of structural material is obtained, devoid of such significant drawbacks as low moisture resistance and subsequent shrinkage. Autoclaved aerated concrete blocks have higher quality characteristics in relation to non-autoclaved aerated concrete.

Autoclaved cellular concrete (aerated concrete or gas silicate) consists of quartz sand, cement, lime and water. These components are mixed and fed into the autoclave, where, under certain conditions, they are foamed and subsequently hardened. The gas (hydrogen) that results from the so-called swelling process (this process is similar to the process used to make yeast dough) increases the volume of the wet mixture by 5 times. Aerated concrete is well subject to processing with the simplest tools: it is sawn, drilled, planed, nails and staples are easily hammered into it.

An important factor determining the use of aerated concrete in the construction and reconstruction of buildings and structures is its fire resistance. This material does not burn, as it consists only of mineral components. Environmentally safe, natural radioactivity is lower than that of reinforced concrete and heavy concrete, since the density of the material is less.

Modern factories for the production of aerated concrete blocks supply products with the exact dimensions of the block itself (manufacturing error is not more than 1 mm), as a result of which the uneven laying of the mortar layer between the blocks is eliminated.

Mortar layers are more thermally conductive than the blocks themselves, which means that if the blocks are uneven and size mismatches have to be compensated for by periodically thickening the solution layer, the thermal insulation properties of the entire building envelope will suffer. Therefore, the laying of aerated concrete is carried out on a special glue made from a dry mix by adding water to it immediately before starting work. The seams in the adhesive masonry are minimal, and the wall is almost monolithic.

The surfaces of aerated concrete walls usually do not require the application of a plaster layer on them, since the surfaces of aerated concrete blocks and an almost imperceptible masonry joint already have a very attractive appearance in themselves.

An aerated concrete wall is 2-3 times lower in cost than a brick wall, and much higher in quality. Transport capacities are economically used, work is possible in cramped conditions of dense urban development. The exact dimensions and even surface of the blocks provide significant savings in finishing materials.

Comparative characteristics brickwork and aerated concrete

Characteristic	Brick	aerated concrete block
1. Wall thickness to ensure thermal conductivity, according to building codes	not less than 1500-1950 mm
2. Consumption of masonry material, m 3 / m 2
3. Weight 1 square. m wall, kg
4. Foundation thickness	not less than 1950 mm
5. Environmental factor (tree - 1)
6. Labour-intensive masonry		5-10 times lower than brick

Aerated concrete blocks are produced with a density of 350 to 700 kg/m 3 . Aerated concrete with a density of 350 kg / m 3 is used only as a heater, with a density of 400 kg / m 3 - not for construction bearing walls and as a filler for load-bearing walls of a multi-layer structure. Aerated concrete with a density of 500 kg / m 3 is used for the construction of houses up to 3 floors high. Prefabricated aerated concrete has exact dimensions block, which affects the quality of the masonry.

The main dimensions of aerated concrete blocks

Size	Volume 1 block, m 3	Quantity blocks in m 3	Number of blocks PCS.		Weight of 1 block dry, kg
				on a pallet
600x250x50
75
100
150
200
250
300
375
400
500

Aerated concrete for exterior masonry shall be manufactured and tested in accordance with GOST 31359-2007. For cellular concrete, the following physical, mechanical and thermophysical characteristics are determined: average density; compressive strength; frost resistance; thermal conductivity; drying shrinkage; vapor permeability. All these characteristics should be reflected in the manufacturer's quality certificates.

The actual value of the compressive strength of cellular concrete (except for thermal insulation) must not be lower than the required strength, determined by GOST 18105. Cellular concrete should have the following compressive strength classes: B0.35; B0.5; B0.75; B1.0; B1.5; B2.0; Q2.5; B3.5; AT 5; B7.5; AT 10 O'CLOCK; B12.5; B15; B17.5; IN 20.

According to the average density, cellular concrete grades are regulated as D200; D250; D300; D350; D400; D450; D500; D600; D700; D800; D900; D1000; D1100; D1200. The actual value of the average density of cellular concrete should not be higher than the required one, determined by GOST 27005.

Depending on the purpose, cellular concrete is divided into:

- heat-insulating: compressive strength class not lower than B0.35, average density grade - not higher than D400;

- structural and heat-insulating: compressive strength class not lower than B1.5, average density grade - not higher than D700;

- structural: compressive strength class not lower than B3.5, average density grade - D700 and above.

For laying outdoor and internal walls during construction 1-5 storey houses(depending on the class of concrete) various modifications of blocks are produced: ordinary, facade, polished, colored.

The main types of aerated concrete blocks for outdoor masonry

Block with grip for hands and unique tongue-and-groove masonry system
	Density (kg / m 3)	Dimensions (mm): 625 x 250 x 375 625 x 250 x 300 625 x 250 x 250 625 x 250 x 200
Straight Block with Hand Grips
	Density (kg / m 3)	Dimensions (mm): 625 x 250 x 375 625 x 250 x 300 625 x 250 x 250
Block with tongue-and-groove masonry system
	Density (kg / m 3)	Dimensions(mm):
straight block
	Density (kg / m 3)	Dimensions (mm):

Having a porous structure, cellular concrete compares favorably with traditional Russian market building materials:

environmentally friendly (not subject to decay, does not emit harmful substances);

fire resistant;

lightweight, its low density and high heat-insulating properties make it possible to reduce the mass of walls by 25–55% compared to structures made of lightweight concrete; enclosing structures made of cellular concrete are 3 times lighter than brick ones, the heat-insulating properties of walls made of cellular concrete are three times higher than those of ceramic or silicate brick and eight times higher than that of heavy concrete;

has excellent soundproofing properties;

it is easily processed with the simplest tools - a hacksaw, an ax, a planer;

easy to use, allows you to reduce the consumption of the solution by 5-7 times, and labor intensity by 4 times.

The coefficient of thermal conductivity of cellular concrete in a dry state and the coefficient of vapor permeability, depending on the brand in terms of average density, must comply with clause 4.10 GOST 31359-2007.

Quality indicators of prefabricated aerated concrete

Grade of cellular concrete by average density	The coefficient of thermal conductivity of cellular concrete in a dry state λ 0, W / (m ∙ ° С)	Vapor permeability coefficient of cellular concrete μ, mg/(m∙h∙Pa), not less than

As noted above, cellular aerated concrete blocks are highly environmentally friendly, their bearing capacity allows them to be used as a structural material. But during the reconstruction of housing of the III capital group, where it is necessary to remove excessive moisture from the structures, an important quality of aerated concrete is the resistance to rotting and mold formation, frost resistance and durability. Thanks to thermal insulation properties and heat storage capacity prevent significant temperature fluctuations in the premises, aerated concrete products ensure the creation of a favorable microclimate in the home due to the ability to absorb moisture and give it away depending on the humidity of the surrounding air.

Aerated concrete is used to produce a wide range of products. Partition blocks made of cellular concrete are used for laying interior and inter-apartment partitions, thanks to their heat storage capacity they maintain a favorable microclimate in the room. Aerated concrete floor slabs are used in the construction of residential and public buildings up to 4 floors high. Floor slabs belong to category III of crack resistance in accordance with the classification of SNiP 2.03.01-84. The working drawings of the slab are designed for design loads (without taking into account the own mass of the slab) of 350 kg/m. Compressive strength corresponds to the concrete class - B 2.5 (M35), density grade - D600, frost resistance - F25.

Product Range - Aerated Concrete Products

			Small wall blocks made of cellular concrete GOST 21520-89, TU 5741-142-46854090-02
Concrete grade by density			D700	D600	D500	D400
			At 3.5	At 2.5	At 1.5	At 1.5
			M50	M35	M25	M20
			0,18 0,14	0,14 0,132	0,12 0,103	0,10 0,088
Frost resistance grade
Release humidity,%
Block dimensions (mm)			600x300x200 600x200x200 600x150x200 600x150x400		600x400x250 600x400x200 600x200x250
			Partition blocks made of cellular concrete GOST 21520-89, TU 5741-142-46854090-02
Concrete grade by density			D700	D600	D500	D400
Compressive strength class of concrete			At 3.5	At 2.5	In 2.0	At 1.5
Concrete grade for compressive strength			M50	M35	M25	M20
Thermal conductivity coefficient W / m ° C according to GOST for IZAB			0,18 0,14	0,14 0,132	0,12 0,103	0,10 0,088
Frost resistance grade
Release humidity,%
Block dimensions (mm)			600x400x100 600x400x120		300x400x120	300x400x100
			Heat-insulating products made of cellular concrete GOST 5742-76, TU 5741-001-08890619-99
Concrete grade by density			D400	D270	D220
Dry compressive strength, not less than (kg/cm)			10,0
Thermal conductivity coefficient W / m ° C according to GOST for IZAB			0,10 0,076	0,069 0,058	0,064 0,056
Release humidity,%
Dimensions of insulation boards (mm)			600x400x120 300x400x120 600x400x150 300x400x150 200x300x400(500) 200x150x400(500) 200x100x400(500) 400x150x400(500) 400x100x400(500)
			Floor slabs made of cellular concrete GOST 130150-83, GOST 19570-74, album "Ural PromstroyNIIproekt" code 8005-1812
Designation				Concrete class	Density, kg / m 3	Volume, m3
P30.15-3.5Ya	2980	1490		At 2.5		1,11
P30.12-3.5Ya	2980	1190		At 2.5		0,89
P33.12-3.5Ya	3280	1190		At 2.5		0,98
P42.12-3.5Ya	4180	1190		At 2.5		1,24
P60.15-3.5Ya	5980	1490		At 2.5		2,23
P60.12-3.5Ya	5980	1190		At 2.5		1,78
			Lintels made of cellular concrete GOST 948-84, GOST 25485-89, album of JSC "UralNIAScenter" code 8021.2242

To give beauty and also uniformity to the surface of the structure, for example, so that the superstructured floor as a result of reconstruction does not differ from the lower floors, - aerated concrete masonry can be faced with brick or tile. In this case, air ventilated gaps between the cladding and the aerated concrete block are required.

Aerated concrete - modern construction material, combining best properties stone and wood. Its application is possible in almost all climatic zones Russia for low-rise and high-rise construction of civil, residential, commercial and industrial facilities. Aerated concrete blocks are successfully used in the reconstruction of old buildings to insulate facades and increase their number of storeys.

Today building technology used to build houses are constantly being improved. Manufacturers use innovative materials. Recently, aerated concrete blocks have become the most popular. In our company, you can buy gas blocks (which are often confused with foam blocks) from the manufacturer at affordable prices in Moscow and the Moscow region.

Aerated concrete wall blocks Bonolit with density D500, D600 are excellent for use as a material for partitions in low-rise and high-rise construction. Only with the use of aerated concrete is it possible to erect partition blocks with a thickness of 100 mm, which ensures greater effective area premises. For construction, you can also buy foam blocks inexpensively, but the manufacturing technology of foam blocks does not allow you to achieve similar parameters.

Operational properties of aerated concrete.

Low thermal conductivity. The thermal conductivity of aerated concrete does not exceed 0.14 W / m2, which ensures high thermal insulation of the building at any external temperatures. If you decide to buy foam blocks in Moscow, keep in mind that their thermal conductivity is noticeably higher than that of gas blocks. It is 0.38 W / m2.

The lightness of the material. The weight of Bonolit 40 wall blocks made of aerated concrete is 25 kg. Due to such a small mass, the use of additional lifting equipment is not required to work with gas blocks. For foam blocks, this indicator is quite difficult to maintain, since manufacturers cannot strictly follow the recipe during their manufacture, and the weight and density indicators fluctuate significantly.

High frost resistance. Due to the presence of many through pores that displace water and ice during freezing, aerated concrete is able to withstand up to 100 cycles of alternate freezing and thawing. The same indicator for foam blocks is only 35 cycles.

Simple processing. Aerated concrete can be easily sawed, drilled, milled, planed using universal tools. Due to the difference in weight and the homogeneity of the structure of the materials, it will take much more time and effort to create a suitable form from the foam block.

Comparison of foam concrete and aerated concrete

Characteristics	aerated concrete	foam concrete
Coefficient of thermal conductivity	0,084-0,147	0,22-0,37
Coefficient of thermal conductivity	300, 400, 500	600, 700, 800, 900
Strength	Class B2.5 at D400	Class B2.5 at D700-800
Vapor permeability	Aerated concrete is higher than foam concrete at the same density
Deviations of geometric dimensions	+/- 1 mm	Up to 30 mm
Masonry, joint thickness	Glue laying. Seam 1-3 mm	For sand-cement mortar. Seam up to 16mm
Foundation	Foam concrete has a higher specific gravity, therefore, with the same strength, the load on the foundation of foam concrete is higher
Mounting	Because foam concrete blocks are heavier, it is more difficult to carry out work on the construction of a wall and their further finishing with them
Material Handling	Foam concrete blocks more dense and uneven in structure, so they are more difficult to saw
Durability	Over 100 years	About 50 years