Chamotte brick: features, varieties and subtleties of use

Chamotte brick: features, varieties and subtleties of use

During the construction of a furnace or fireplace in the house on the forefront, it is necessary to use materials resistant to fire. That is why most of the buyers make their choice in favor of chamotte brick. This building material can withstand extremely high temperatures and direct prolonged exposure to the flame. It is noteworthy that the shape is not deformed and does not scatter even with long heating.

Chamotte brick: features, varieties and subtleties of use

What it is?

Chamotte brick is characterized by a very simple composition, in its basis – the crushed dried chamotte powder, the concentration of which is 65-70%. This substance is produced from a simple white clay, which is purified and long-term burning, due to which it shows pronounced refractory characteristics. Additionally, cokes are introduced in the raw materials, as well as graphite fillers and grains of large-scale quartz. The initial components are thoroughly mixed, then molded and sent to the firing and crimping.

Chamotte brick: features, varieties and subtleties of use

Chamotte brick: features, varieties and subtleties of use

Chamotte brick: features, varieties and subtleties of use

Chamotte brick: features, varieties and subtleties of use

It is the features of the firing and determine the basic operational parameters of the material. The duration of the material baking is of great importance. So, if the raw is to reap in thermal powder, then a vitreous film appears on its surface. It is pretty durable and gives the material a special resistance to mechanical damage, but refractory at the same time falls.

Chamotte brick: features, varieties and subtleties of use

Chamotte brick: features, varieties and subtleties of use

Chamotte brick: features, varieties and subtleties of use

Chamotte brick: features, varieties and subtleties of use

If, on the contrary, the firing will be insufficient, such a material will be perfectly absorbed and keeping moisture inside itself, and therefore its strength will be very dubious. The best brick for furnaces and fireplaces can be obtained only if you adhere to the “Golden Mid”.

The production of chamotte brick is governed by the current standards, while its size and weight can often be significantly different: from 2.5 and up to 6 kg, and parameters are 230x111x65 mm, as well as 300x150x65 and 250x123x65 mm. In addition, the products differ in the peculiarities of the density and porosity of the structure.

Chamotte brick: features, varieties and subtleties of use

Characteristics

Chamotal building material performed on existing technology, There are a number of operational features:

  • The color of the product should be light yellow, rather straw with an admixture of brown engines;
  • Brick structure Only grainy;
  • When hitting the brick, there is a ring of metal;
  • The material is characterized by an increased degree of strength, so with insignificant damage the structure of the chamot remains unchanged.

Chamotte brick: features, varieties and subtleties of use

Professional builders and decisions identify both the advantages and disadvantages of such bricks.

Benefits include the following parameters.

  • Strict geometry of details, it is extremely important when using wedge-shaped materials.
  • Heat resistance. The internal structure of the brick does not affect the long-term effect of elevated temperatures, such a material may be resistant to withstand heating to 1500 or more degrees. It should be noted that in principle the heating of more than 1000 degrees from all types of bricks can withstand exclusively chamoten.
  • Low thermal conductivity. This characteristic, as well as a low density of individual varieties of material make such a brick with an optimal option for the installation of chimneys and various pipes.
  • Fortress. Chammed materials have the ability to withstand even quite strong mechanical effects.
  • Chemical resistance. Products from chamot excellent influence of various acid-alkaline solutions and oppose many other chemical reagents.

    Chamotte brick: features, varieties and subtleties of use

    Chamotte brick: features, varieties and subtleties of use

    However, nothing perfectly invented, and chamoten brick did not exceed. There are negative moments related to its use.

    • If the firing technology is incredible, the dimensions of products and their quality level are significantly changed.
    • Chamotal materials are not at all costs, so they cannot be considered available for most of our compatriots.
    • Not all solutions are suitable for masonry. Usually use a special composition called “Meter”, and it is necessary to apply it very carefully, so that the layer turned out very thin.
    • Increased strength significantly limits the ability to cut the material. It is possible to cut it only with a special diamond disk by stone.

    Chamotte brick: features, varieties and subtleties of use

    It should be noted that the available negative sides do not reduce the popularity of the material and do not limit its use in the arrangement of fireplaces and home furnaces.

    Application area

    Chamotte brick is used everywhere in industry, and is also often used to build fuel chambers of different types and technological boilers. It is in them the stone coal is burned.

    Chamotte brick: features, varieties and subtleties of use

    Chamotte brick: features, varieties and subtleties of use

    Chamotte brick: features, varieties and subtleties of use

    Chamotte brick: features, varieties and subtleties of use

    The material is also common in everyday life, here it has found its use for the construction of fireplace fires, kitchen foci and wood stoves. For flue pipes, experts also recommend rafting fire-resistant chammed blocks, they can withstand not only hot air, but also adverse types of atmospheric influences.

    Chamotte brick: features, varieties and subtleties of use

    Chamotte brick: features, varieties and subtleties of use

    Chamotte brick: features, varieties and subtleties of use

    Chamotte brick: features, varieties and subtleties of use

    A lot of rumors and myths walk around the characteristics of the material. It is the opinion that when heated, he begins to allocate harmful components and even radiation. Experts fully refute all these theories. Moreover, if the last statement is still possible in the theory (if the brick is made from clay, produced in the area subjected to radiation infection), then it is impossible to believe in the first. Most likely, the reason for the appearance of such rumors is as follows: Some types of fire-resistant materials are really at the effects of hot air begin to distinguish toxic substances. However, it does not apply to the chamotal block because it was originally created as material for domestic use.

    Chamotte brick: features, varieties and subtleties of use

    Views

    Brick from the chamot differs in a number of foundations:

    • by molding;
    • According to the finished product already;
    • By porosity.

    Chamotte brick: features, varieties and subtleties of use

    Depending on the variant of the formation of raw materials, several varieties of chamotte brick are distinguished:

    • molded by a semi-dry method;
    • molten;
    • thermoplastic pressed;
    • cast;
    • hot-photographed.

    Chamotte brick: features, varieties and subtleties of use

    The type of brick is distinguished by the shaped, figure, wedge, as well as arched and trapezoidal species. The most popular is the most popular shape in the form of a rectangle, but when installing arched structures it is better to use a wedge material. Depending on the level of porosity, distinguish:

    • Brick of high density – with grain indicators not higher than 3%;
    • High-detached – in this case, the graininess is differentiated from 3 to 10%;
    • dense – with porosity parameter from 10 to 16%;
    • refractory refined – with a porosity parameter at a level of approximately 16-20%;
    • Middle Plot – differs in graininess at 20-30%;
    • High-resistant – in this case, the grain rate corresponds to 30-45%;
    • Lightweight – with elevated grain parameters 45-85%;
    • Ultralegacent – In this case, graininess exceeds 85%.

    Chamotte brick: features, varieties and subtleties of use

    Separately, you need to stay at this version of chammed bricks, as quite popular lightweight products. These bricks are usually used instead of insulating. They consist of a special fatty clay, as well as peat, chips or sawdust and some other organic components. In the process of heat treatment, they completely burn out, leaving instead of pores of a wide variety. As a result of this technology, a porous material with high energy efficiency.

    Chamotte brick: features, varieties and subtleties of use

    Lightweight bricks are made entirely of organic substances, therefore are considered environmentally safe, they do not emit harmful and toxic substances, and therefore are suitable for use in residential premises. By the way, the special structure does not affect the heat resistance of the material: lightweight brick can even withstand extremely increased exposure to 1800 ° C.

    Chamotte brick: features, varieties and subtleties of use

    As for the form, such bricks are wedge-shaped or rectangular. In order for the material to fully maintain all its initial operational features in full, it should be a strict geometry with smooth corners and faces.

    Light brick, as a rule, is used to form a layer of thermal insulation when equipped with electrical furnaces, as well as evaporates and heaters. Quite often, it is acquired for the facing of boilers of heat exchange and steam pipelines. At the same time, such protection can significantly reduce thermal losses (by 25-75%) and thereby reduce the dimensions of heat instruments. Experts note that if you take chammed stoves for furnaces, then the heating and cooling period will decrease 5 times, while all the costs of heating will be reduced by 10-15% in continuously functioning furnaces and 45% in those that work from time to time.

    Chamotte brick: features, varieties and subtleties of use

    Brands

    All chamotte products in Russia are subject to mandatory labeling, which is applied to one of the sides of the brick. Typically, manufacturers make up it from several letters and numbers, while the total number of characters varies from 5 to 47. Marking signs mean chemical-physical material features. Usually you can see the following notation.

    • Sha / SB / Shack – Under this designation, the general purpose bricks are coming, which have exceptionally high strength parameters and are able to withstand heating to 1700 ° C. Such brands are very popular with developers, because they have an optimal price / quality ratio.
    • Shv / Shus – marking, denoting industrial shaft. It is characterized by a high heat capacity, so optimal in the arrangement of gas generators gas strokes, as well as for the facing of the fences of convective mines.
    • SC – such materials are used in the construction of industrial technological equipment for the manufacture of coke.
    • It was a brick that is characterized by an increased degree of porosity. It is most often used for the lining of production furnaces and can maintain its operational properties with a continuous action of high temperatures (up to 1300 ° C).
    • The Shtsu is an end fire-resistant blocks that are universally used for the manufacture of rotating parts of industrial furnaces.
    • PB – represents ordinary shaft, which is used everywhere in everywhere.
    • PV – includes products that have been used in the installation of chimneys and the inside of homemade fireplaces.

    Chamotte brick: features, varieties and subtleties of use

    Figures indicate brick dimensions in accurately in accordance with applicable standards and standards. For example, under the labeling of SB-8 lies brick with dimensions 250x124x65 mm, and Sha-5 is a product with parameters 230x114x65 mm.

    Chamotte brick: features, varieties and subtleties of use

    How to choose?

    Chamotte brick is quite expensive, so I need to take it with all seriousness. If you get low-quality material, then you risk simply lose all your money. If you ended up in a construction store with a good reputation, it does not guarantee that you will be offered the perfect product without external defects, Therefore, when choosing, pay attention to all important details.

    • The basic product quality indicator is its color, it must certainly be straw yellow. If you are brighter, almost white blocks, most likely, you see a brick in front of the furnace, which absorbs moisture well and is subject to destruction from the inside. Yes, and heat in it is accumulated much worse, and therefore, the functionality will be under a big question.
    • Brick should have a rather smooth coating and perfect form. Many believe that these requirements are dictated by the aesthetic component of the project, but this is not so. The fact is that when adjusting the fireplace or stove, the inner surface must be smooth, every relief obtained due to the preservation of the residue of the solution or the bumping of the brick leads to the creation of barriers for the flow of heated gas. If the defect does not eliminate, the uneven heat distribution begins, as a result, the thrust level will be insufficient, and the heat transfer will fall greatly.
    • The furnace laying is distinguished by a very strong docking of chamotte bricks, a small amount of seams and an embezzle density. If the material used has cracks, chips and other shortcomings, it is impossible to ensure reliable clutch. In this regard, buying bricks, be sure to choose them from one party. Otherwise, you risk getting completely inhomogeneous material, which can mostly affect the operational features of your future thermal element.

    Chamotte brick: features, varieties and subtleties of use

    How to put?

    The technology of the construction of furnaces and fireplaces from chamotte bricks at home consists of 2 stages:

    • preparatory work;
    • Directly masonry.

    Chamotte brick: features, varieties and subtleties of use

    Chamotte brick: features, varieties and subtleties of use

    At the preparation stage, there are marked by all future corners and walls, as well as the manufacture of the necessary adhesive solution and pre-dry masonry. For constant masonry, bricks use a special composition, it can be purchased ready in the store, and you can cook yourself. You will need a refractory powder clay, high-quality chammed sand, as well as technical water.

    Chamotte brick: features, varieties and subtleties of use

    First you need to grind the clay, then sift all the sand and add the water to the resulting clay and sand mixture with constant stirring water. The finished composition is left for two or three days, stirring from time to time. Clay and sand take in a 1: 2 ratio, some builders recommend adding salt or 3% liquid glass at the rate of 100 g per 10 liters of water.

    Chamotte brick: features, varieties and subtleties of use

    Fire resistant bricks first cut, and then fasten so that each next row completely overlap the seams between all blocks of the previous row. Such technology causes the fortress of the whole structure, and also contributes to the normal redistribution of the load.

    When carrying out styling with your own hands, pay special attention to the seams. If it is made wrong, that is, the seam is too shut away or it is not completely embellished, droplets and snow begin to fall inside (it concerns street structures), and when cold, melting cracks. The fireplace crawled along the seam cannot perform all its functions in full, and its heat capacity is significantly reduced.

    Chamotte brick: features, varieties and subtleties of use

    About how to put shampting brick with your own hands, look in the following video.

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