U blocks of aerated concrete: shape, width, application. U-shaped aerated concrete blocks: the best way to equip jumpers in the building U-shaped aerated concrete blocks how to use

In the field of housing construction, the range of building materials used is expanding. Aerated concrete U-blocks made of lightweight cellular concrete with specific gravity up to 0.45 t/m3. With the help of profile products, it is easy to make strong jumpers, build a stationary type formwork, and also form a strong power circuit. Depending on the complexity of the tasks performed, products with different dimensions are used. Let us consider in detail the aerated concrete block of the U-shaped configuration, let's evaluate the advantages.

Where are U-shaped blocks of aerated concrete used

Widespread U blocks from aerated concrete are used to solve a complex of serious tasks:

manufacturing of formwork of a stationary structure;
making strong jumpers for openings;
structures of a power belt with increased strength;
formation of a support contour for the installation of a truss structure;
construction of an armored belt to strengthen the walls.

The shape of the cellular composite in cross section is similar to a tray. After laying steel bars in the gutter, combining them into a common power circuit and pouring mortar, the concrete mass gradually hardens, acquiring operational strength. The power belt evenly distributes the existing load on the walls and openings. This significantly increases the rigidity of the building box.

U shaped aerated concrete blocks have an unusual purpose

How U-blocks are made from aerated concrete

The popular AAC U-blocks are produced using proven technology using state-of-the-art equipment. The material used is concrete with evenly distributed air cells.

It is made from the following components:

a binder, which is used as Portland cement marked M400;
pre-sifted quartz sand medium size, acting as a filler;
aluminum powder used to form the cellular structure of the gas silicate array;
water, which is introduced to the required consistency of the composition and, reacting with aluminum, contributes to the formation of air cavities;
additives based on calcium chloride and silicate, which improve the strength characteristics of the composite.

The percentage of components is determined experimentally. During chemical reaction gas is actively released, which forms evenly distributed cavities. Thanks to the air cells, the heat capacity of the gas silicate increases.

Products are manufactured according to the following algorithm:

Portland cement, lime and sand are mixed according to the recipe.
Technical water and aluminum powder are added.
The silicate composition is filled in special forms.
Waiting for gas formation, as a result of which the material increases in volume.
Products are steamed in autoclaves at high blood pressure and temperature.
Products are removed from the formwork, stored on pallets, packed.

An important factor is that these blocks can be laid on any of the sides.

Technological process provides for the possibility of manufacturing only under conditions manufacturing enterprises. This requires special equipment, adherence to autoclaving regimes and laboratory quality control. Thanks to industrial technology air cells are evenly distributed in the concrete mass. The autoclave method of production provides an opportunity to obtain products popular in the construction industry.

By purchasing an aerated concrete block having y-shape, pay attention to the following points:

product color. Autoclaved products have White color, unlike gray foam concrete products manufactured at the construction site;
quality certificate. The presence of a document confirming the compliance of product characteristics with the requirements of standards indicates a quality control system.

In use quality products with proven operational properties there will be no unforeseen situations.

Design features and dimensions

Main design features:

a longitudinally located cavity resembling a tray in shape;
the same length of various standard sizes of products, which is 50 cm.

Aerated concrete block having a profile shape is manufactured according to modern technology

Blocks are manufactured with the following dimensions:

width, component 200, 250, 288, 300, 365, 375, 400 mm;
height equal to 200 or 250 mm;
wall thickness at the top of the tray 7 or 14.5 cm.

The standards provide for the manufacture of a standard range of products in accordance with the specified dimensions.

Profile aerated concrete block - application nuances

For masonry, a special glue is used. Reinforcement of the structure is made with steel rods, which are located inside the gutter, filled concrete mix. The grade of the concrete mixture used, as well as the assortment of reinforcement, are determined depending on the magnitude of the acting forces. Cavities are filled with concrete up to the top edge. After the final hardening of concrete, profile products are formed monolithic structure with increased strength.

When using aerated concrete U-shaped blocks, observe the following recommendations:

install the elements on the supporting surface after the final set of concrete operational strength. Concrete acquires its final strength 4 weeks after pouring;
the area of the supporting surface must cover the entire width of the products, including hardened concrete with reinforcement, and be at least 20 cm. It is forbidden to use the walls of the upper part of the gutter as a supporting plane.

The autoclave method for producing gas blocks having a U-shape makes it possible to obtain products that are popular in the construction of buildings

A one-piece structure based on profiled gas silicate elements is capable of absorbing significant forces, protecting the walls of the building from local destruction.

Gas-filled concrete also performs the function of a heat-insulated formwork. In order to increase the thermal insulation properties, a foam or polystyrene foam insert is located inside the gutter. This allows you to increase the efficiency of thermal insulation, get rid of cold jumpers, significantly reducing the level of heat loss.

What are the advantages of u blocks of aerated concrete

The profile aerated concrete block has a number of advantages:

light weight;
exact dimensions;
increased surface cleanliness;
resistance to temperature fluctuations;
fire safety;
long period of use;
harmlessness to others;
elevated thermal insulation properties.

An expanded range of products with standardized dimensions makes it possible to fit them into different kinds masonry.

In the process of their manufacture, laboratory quality control of products is carried out.

Using a U-Block as Jumpers

The construction of jumpers is carried out by various methods:

laying is carried out on a solid wooden or metal base installed above the opening. A steel rod is located in the gutter, the container is filled with concrete. The base is dismantled after the concrete has hardened;
products are placed on a flat and stable surface, reinforced and filled with concrete mix. The solution hardens, then whole reinforced concrete beam is lifted with the help of a lifting device to the required area.

The choice of the method of concreting the lintels is determined individually, depending on the specifics of the work.

We use U-shaped products made of aerated concrete to form an armored belt

To create an armored belt, the products are installed on the final row of masonry according to the following algorithm:

The supporting surface of the walls is smeared with glue and blocks are installed.
The reinforcing cage is prepared by fixing the rods with knitting wire.
The reinforcement is laid, ensuring its immobility with spacers.
Moisten the surface of the gutter, and fill the tray with concrete.
Compact the concrete mass and level its surface.

It is important to carefully compact the concrete to remove air pockets.

How is U-shaped profile aerated concrete supplied?

Finished products are transported on special pallets, the area of which can accommodate up to 60 units. In particular, 50 pieces with dimensions of 50x20x25 cm are supplied on a standard pallet. Knowing the number and dimensions of products, it is easy to calculate the need for material.

Results

Using profile products made of aerated concrete, it is possible to reduce the duration construction works and form a structure with increased thermal insulation properties. Blocks have a set of advantages that allow them to be used to solve various problems.

Ordinary reinforced concrete lintels produced by factories often cannot be used for buildings that have unusual shape and original openings. In addition, there is another problem - high price jumpers themselves and the cost of transporting massive products.

Aerated concrete lintels are free from all these shortcomings. They can be prefabricated or prefabricated-monolithic.

Advantages, characteristics and purpose of blocks

Tray u blocks made of aerated concrete can play the role of formwork, and also make it possible to produce lintels of prefabricated type or precast-monolithic.

Material Advantages

Easy Installation. small specific gravity material (with good strength properties), makes it possible to save money without using special equipment and lifting devices. Aerated concrete jumpers can be mounted manually.
Exact dimensions (standard sizes), according to the parameters announced in the standards. Varieties of these elements can be used based on the thickness of the walls. Their width exactly matches the similar parameters of ordinary (ordinary) aerated concrete blocks.
Uniformity load-bearing structures and inline elements. They are made of the same material as the walls of the building. Due to this circumstance, the finishing of the building is facilitated and accelerated.
Aerated concrete u blocks form a protection against heat loss, and also prevent the creation of "cold bridges".

Note! These elements have length/height dimensions of 60 x 20 or 50 x 20 cm and thickness of 25 cm, 30, 37.5 and 40. This makes it possible to choose the size of the jumper that matches the partition or wall.

purpose

U-shaped aerated concrete blocks can be used for the following.

Like lintels of door and window openings external walls and partitions having a width of 90/150 cm.
As strapping stiffening belts.
As supports for prefabricated reinforced concrete floor slabs.
As supporting elements of rafters and mauerlats.

Block properties

Below is a table of the main characteristics of the products.

Grade by density		D-500
Bulk density (normalized)		500 kg per cubic meter
Compressive strength class		B-2.5
Thermal conductivity coefficient (dry state)		0.114 W at 1° Celsius
Thermal conductivity coefficient (humidity 8%)		0.146 W at 1° Celsius
Thermal conductivity coefficient (humidity 12%)		0.162 W at 1° Celsius
Shrinkage of blocks when they dry	not more	0.3 mm per 1 m
Product class for frost resistance		100-F
Vapor permeability coefficient		0.2 mg/m/ h/ Pa
Temperature resistance limit	not less	R-I/150
Deviations from standard dimensions
height		±1 mm
width		±2 mm
length		±3 mm

The transport and loading properties of the blocks are announced below.

Jumper setting

As already mentioned, jumpers made of aerated concrete blocks in the shape of the letter U can be installed in two ways.

prefabricated structures

Prefabricated varieties of lintels are used to cover openings up to 250 cm long.
When installing it, such a block must rest on the walls no less than 20 cm on each side (if the opening width is up to 5 m). When the span is 1.5 / 2.5 m, then the structure should have supports on each side of 25 cm.
The instruction warns that the tray blocks should be mounted on a solid and flat surface. Connect them together with glue for aerated concrete.
When the jumper is mounted on outer wall, in addition, a heat-insulating layer of mineral wool or expanded polystyrene is equipped.
Further, reinforcement bars are placed in the assembled trays or a three-dimensional reinforcing frame is welded. Then into this kind of formwork.
Reinforcement, variety, should be selected based on which wall the jumper is placed on and what width the opening has. Reinforcing bars with a diameter of 8/14 mm and a solution of classes B-15 / B-20 are usually used.

Important! The optimal mobility of concrete when pouring the lintel is cast (shrinkage of the cone is more than 18 cm). This makes it possible not to compact the mixture with a vibrator.

Prefabricated-monolithic analogues

When you need to block an opening with a width of 2.5 / 4 m, the best solution would be to build a precast-monolithic lintel using aerated concrete blocks.

Its manufacture is carried out directly above the blocked span.
First, a temporary support shield is mounted. Next, U-shaped trays are placed on it, so that the extreme ones rest on the wall by no less than 25 cm.
The trays are connected to each other with glue for aerated concrete.

The FavoritBlok company sells U-shaped aerated concrete blocks Bonolit, Ytong, Silabit, etc. at super favorable prices! Delivery in Moscow and the region.

U-shaped aerated concrete blocks are the best and most cost-effective solution for creating lintels that reinforce window and door openings.

These structures, thanks to the reinforcing frame, have high strength, reliability, and at the same time relatively low cost. These qualities make U-shaped lintels indispensable elements in the construction of country houses.

To date, manufacturers of Moscow and Central regions, produce U-shaped blocks with different parameters, properties and sizes. Under these conditions, it will not be difficult to choose the best option for any individual project.

U-blocks and their applications

U-shaped autoclaved gas blocks are used in the construction of residential and public buildings small storey. With their help, they effectively strengthen window and door openings, bearing walls and partitions.

Reinforcement, which acts as a frame, is placed in the inner gutter of the block, which, if necessary, can be subjected to anti-corrosion treatment.

A huge plus of aerated concrete lintels is their uniformity with wall structures. So ideal option is the use of aerated concrete blocks and lintels from the same manufacturer.

The main advantages of U- (P-shaped) aerated concrete lintels

Autoclaved aerated concrete U-shaped blocks have a range of consumer qualities which make them almost indispensable:

High degree frost resistance. For U-shaped aerated concrete blocks, as well as for ordinary gas blocks, low thermal conductivity is characteristic. Therefore, the walls do not need additional insulation;
High degree of fire resistance. The use of U-shaped aerated concrete blocks will ensure the safety of your home, since aerated concrete is a non-combustible material;
The accuracy of geometric dimensions. The maximum deviation from the declared parameters for U-shaped blocks is no more than one mm. This greatly facilitates the construction process;
Light weight structures. Installation work can be carried out manually, without the use of lifting equipment, which significantly reduces construction time and costs;
Homogeneity of the material. U-shaped blocks, acting as lintels, have a structure similar to the structure of gas blocks used for the construction of walls and partitions - this allows you to get homogeneous structures and reduces the cost of exterior finish the buildings.

For 90 years of its existence, aerated concrete has proved that it is an excellent building material, in many ways superior to traditional brick. Today, technologies allow the production of not just parallelepiped stones, but also other forms of aerated concrete.

Types and forms of gas blocks

Traditional Construction Materials with flat edges have excellent heat saving and sound absorption performance. And larger than brick sizes of aerated concrete blocks minimize labor costs and allow you to quickly build walls.

In addition to these, there are modified blocks with a tongue-and-groove connection at the end. They are superior in terms of heat efficiency to planar ones, since the tongue-and-groove ends are connected in the masonry in a lock. Thus, "cold bridges" are almost completely absent, and the wall turns into an almost monolithic surface.

When building a building, you can not do without partitions. Manufacturers also produce such products. They are thinner (up to 150 mm) than those intended for main walls. Strong and lightweight autoclaved gas blocks allow you to quickly and economically install a partition even in wet room. Only 4-5 such blocks are enough to build interior wall area of 1 m2.

U shaped aerated concrete blocks have an unusual purpose. They are used for installation. monolithic belts hardness fixed formwork during the construction of hidden elements of the foundation. Besides, load bearing capacity of these structures allows you to use them as lintels over window and door openings.

gas block u block standard width has a length of 1 to 3 meters. The inside of the stone is filled monolithic concrete with pre-installed fittings.

Strength and density of flat and u blocks of aerated concrete

When choosing blocks, one should take into account, first of all, the parameter aerated concrete density . The higher the D value (as this indicator is marked), the better the heat-saving ability of the stones. But at the same time, the strength index decreases.

The number after the letter D just indicates the value of the density. For example, the most popular gas block brand in our region is D 600. One cubic meter of this stone weighs 600 kg and consists of 40-55% air bubbles up to 3 mm in diameter. The strength of each block is 4.5 MPa.

The heat capacity of aerated concrete grade D 400 is much higher than D 600. This is due to the fact that pores in this material more than 75%. However, its strength is not more than 1.5 MPa. This means that it is impossible to use such stones even in two-story buildings. But sellers are often silent about this.

Obviously, the strength indicator is no less important than the density. Therefore, GOST provides for designating the class of the autoclaved product by this parameter as well. It is marked with the letter B. It indicates the value of compressive strength. For example, B 2 means that the stone has a strength parameter of 2 MPa.

The lower the weight of aerated concrete, the lower the load it can withstand. Therefore, D 300 blocks are not recommended for use in the construction of load-bearing walls.

Aerated concrete width 300mm is used for exterior walls. For internal partitions take . For better sound insulation, thicker ones, 150 mm, are used.

Dream House

Manufacturers give a guarantee of up to 125 years for all forms of aerated concrete. It is believed that the first overhaul of such a house is carried out after 55 years. For comparison, insulated mineral wool or foam brick house will require replacement of the insulation in 25-30 years, and the heat-saving abilities of such a house will not decrease even after a century.

In general, the advantages of the material are as follows:

An important factor is that these blocks can be laid on any of the sides. The structure of the material is the same in all directions, and hence performance characteristics when laying on different planes of blocks, it will remain.

If you want to have a warm, inexpensive and durable home, no best choice than aerated concrete blocks. This material will bring to life the most daring architectural project in the shortest possible time and at the same time save 40% more money than when laying a brick structure of a similar area.

You just need to choose the right parallelepiped and u shaped gas block to make the dream of a better "family nest" come true.

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