Today expanded clay concrete is used in construction quite widely. It is compared with concrete, but the first material is distinguished by more outstanding technical characteristics, among which a low level of thermal conductivity, resistance to chemicals and increased moisture resistance should be highlighted. But expanded clay concrete has a porous structure, so it should not be used for the construction of overall objects and the construction of foundations. On sale today you can find expanded clay concrete wall panels. Their characteristics and features will be discussed below.
Description
Expanded clay panels have the form of block elements that have standard sizes. They depend on the type of cut and vary from 300 to 7200 mm, as for the length, and from 300 to 8100 mm, which is true for the height. Products are widely used in the construction of structures, where they serve as internal partitions and external walls.
Expanded clay panels protrude in reinforced concrete objects to fill the carcass. Expanded clay is lightweight concrete, the expanded clay of which is expanded clay. The connecting element is cement. Some technologies include the addition of lime and gypsum during the production process. The panels also have sand in the composition. Depending on the manufacturing methodology, in the end, you can get materials with different densities. You can classify panels on:
The first option is used in the manufacture of structural, structural and thermal insulation and thermal insulation products.
Classification of expanded clay concrete panels
Expanded clay wall panels can be classified according to various criteria. By appointment, they can be for:
- the attic;
- basement;
- above ground floor.
According to the static scheme of work, products can be divided into self-supporting, supporting and mounted. Among the advantages of the latter should be highlighted reliability and low cost. Among other things, hinged panels have high sound and heat insulation features, have good strength and moisture resistance, and also provide an accelerated pace of work.
Expanded clay wall panels are manufactured according to state standards 11024-84, according to which they can be external, layered, partition walls. External are used for unheated structures, are made of different grades of concrete. Layered are obtained from heavy concrete, to which a heat-insulating layer is added. Partition panels can be made of different grades of concrete.
According to the device, the described products should be divided into prefabricated and solid. The first are composed of the starting elements according to the type of blocks connected by a solution or glue. As the joining technology, a welding technique can be used. Most often they are used where high requirements for crack resistance are imposed on products.
Varieties of panels depending on the number of layers
Expanded clay wall panels can also be classified by the number of layers. So, they are:
- single layer;
- bilayer;
- three-layer.
The screen is called the air gap. If we are talking about single-layer panels, then they have low thermal conductivity. You can also subdivide panels by cutting walls, they can be homogeneous, angular, strip and vertical.
Specifications
As mentioned above, expanded clay concrete panels are classified according to a number of signs, therefore, many designations are accepted by manufacturers. If you see the marking 1, then in front of you is the outer single-layer wall panel of a single-row cut, which can become a carrier. The fact that in front of you is an external single-layer wall panel of horizontal cutting is indicated by the marking of 1NGO. Two-layer wall outer panels of horizontal cutting are products with the designation 2NGP.
If the manufacture is carried out according to state standards 23009, then this indicates that the numbers and letters indicate the type of panel, and a hyphen refers to the expanded clay class for compressive strength. The symbols in the third group indicate additional characteristics, for example, the presence of cutouts and holes. If you saw the marking 2 40.27.30-15, then you have a two-layer outer panel, which has a single-row cut. Its length is 3995 mm, while the height and thickness are 2650 and 300 mm, respectively. As for the compressive strength class, these products comply with B15.
Additional Features
The thickness of expanded clay concrete wall panels was mentioned above, but this characteristic is not the only one that you should be aware of before acquiring the described material. As for thermal conductivity, for these products it is similar to brickwork, the thickness of which varies from 100 to 120 cm.
The number of layers affects the density. Single-layer panels have a density in the range of 900-1 100 kg / cm 3 . The brand of the concrete component affects the weight, the same can be said about the dimensions. Products can reduce the mass of reinforced concrete structures. Strength may also be of interest to you; for these panels it is quite high and can be in the range of 35-100 kg / cm 2 . Expanded clay wall panels, the dimensions of which are mentioned in the article, are quite frost-resistant, they are able to undergo about 500 cycles of freezing and thawing.
More about thermal conductivity
The thermal conductivity of expanded clay wall panels can vary depending on the purpose of the products. If we are talking about heat-insulating panels, then they are used for insulation during the construction process. The density of such a material can vary between 400-600 kg / m 3 , with regard to compressive strength, it is equal to 7-25 kg / cm 2 . But the thermal conductivity is 0.10-0.17 W / (m * K).
On sale you can find structural and thermal insulation products that are used for the construction of facilities where it is necessary to reduce the mass of structures. Such blocks have proven themselves well also because they have impressive dimensions, their density after curing can be equal to 700-800 kg / cm 3 . This provides the material with high strength, which is especially true when compared with thermal insulation products. However, the thermal conductivity in this case is higher and may be equal to 0.22-0.45 W / (m * K). Such expanded clay concrete wall panels, the GOST for the manufacture of which was mentioned above, have less impressive frost resistance, it can correspond to a limit of 20-90 Mp3.
Characteristics of structural expanded clay concrete
Such blocks are the most durable, they are used for the construction of houses and industrial premises. The density is quite high and depends on the type of material. This indicator can reach a value of 1800 kg / m 3 . In the hardened state, the material has a compressive strength of 100 kg / cm 2 . Frost resistance can be equivalent to 100-400 Mp3. But the thermal conductivity is even higher and reaches the level of 0.55 W / (m * K).
Conclusion
Expanded clay wall internal panels - this is just one of the varieties of the described material. The panels can be designed for insulation, erection of structures and structures, as well as used in solving problems aimed at reducing the mass of buildings and structures.