All about the meter chamotte

Chamotal measurement: What it is, what is his composition and features – professional live shops know the answers to these questions, but the amateurs are better to get acquainted with such a type of masonry materials. You can find dry mixes with the designation of MSh-28 and MSh-29, MSh-36 and other brands whose characteristics are fully consistent with the tasks set before refractory. It is necessary to figure out why the meter is needed and how to use it will help detailed instructions for the use of this material.

What it is

Chamoten meter refers to the category of construction solutions of special purpose used in a bary. The composition is characterized by high refractory properties, it is better to carry the temperature and contact with open fire than cement-sand solutions. It includes only 2 main ingredients – chamotte powder and white clay (kaolin) mixed in a certain proportion. Tint of dry mix brown, with sharing of gray inclusions, the size of fractions does not exceed 20 mm.

The main purpose of this product – Creating masonry using refractory chamotte brick. Its structure is similar to that the mixture itself possesses. This allows you to achieve increased adhesion, eliminates cracking and deformation of masonry. A distinctive feature of a chamotte meter is the process of hardening – it does not freeze, but sinters with bricks after thermal exposure. The composition in the packaging of different volumes, the most demanded options from 25 and 50 kg to 1.2 t.

The main characteristics of the chamotte member are as follows:

  • heat resistance – 1700-2000 degrees Celsius;
  • Shrinkage during calcination – 1.3-3%;
  • humidity – up to 4.3%;
  • Consumption per 1 m3 masonry – 100 kg.

Fireproof chammed followers are distinguished by ease of use. Solutions of them are prepared on a water basis, determining their proportions based on the specified masonry conditions, requirements for its shrinkage and strength.

The chamotte meter includes a brick indicators from the same material. This determines not only its heat resistance, but also other characteristics.

The material is fully safe for ecology, when heated is not toxic.

What is the difference from chammed clay

The differences between chammed clay and the measureer are essential, but it is difficult to say which material is better coping with its tasks. Of great importance here has a specific composition. Chamoten meter also contains clay, but it is a ready-made mixture, with already included fillers. This allows you to immediately move to work with a solution, spreading it with water to the desired proportions.

Chammed clay – Semi-finished product additives. Moreover, according to the degree of fire resistance, it is noticeably inferior to the finished mixtures.

The meter has its own characteristics – it needs to be used only in a pair with chamoten brick, otherwise the difference in the density of the material during the shrinkage will lead to cracking.

Marking

Chamoten meter has a marking consisting of letters and numbers. The mixture is indicated by the “MSH” lists. The figures displays the percentage of components. Based on refractory aluminosilicate particles, plasticized metals are produced with another labeling.

The higher the specified number, the better the heat resistance of the finished composition. Aluminum oxide (Al2O3) provides mixtures given performance characteristics. The following grades of chamotte meter are standardized by standards:

  1. MSh-28. Mixture with aluminum oxide in the amount of 28%. It is used when laying furnaces of household furnaces, fireplaces.
  2. MSh-31. The amount of Al2O3 here does not exceed 31%. The composition is also focused on not too high temperatures, it is used mainly in everyday life.
  3. MSH-32. The brand is not normalized by the requirements of GOST 6237-2015, is manufactured by.
  4. MSh-35. Chamotte meter based on bauxite. Aluminum oxide is contained in the amount of 35%. There are no inclusions of lignosulfate and sodium carbonate, as in other brands.
  5. MSh-36. The most common and popular composition. Combines fire resistance Over 1630 degrees with an average aluminum oxide content. He has the lowest mass fraction of moisture – less than 3%, the size of the fractions – 0.5 mm.
  6. MSh-39. Chamoten meter with refractority Over 1710 degrees. Contains 39% aluminum oxide.
  7. MSh-42. Not normalized by the requirements of GOST. It is used in furnaces, where the combustion temperature reaches 2000 degrees Celsius.

In some marks of chamotte meter, presence is allowed in the composition of iron oxide. It may be contained in MSh-36 mixtures, MSh-39 in volume not more than 2.5%. Fractions sizes are also normalized. Thus, the MSH-28 brand is considered the largest, the granules reach 2 mm in the amount of 100%, while the options with increased refractory, the graininess does not exceed 1 mm.

Instructions for use

The solution of the chamoite meter can be kneaded on the basis of ordinary water. For industrial furnaces, the mixture is made using special additives or liquids. Optimal consistency should resemble liquid sour cream. Stirring is carried out manually or mechanically.

Correctly cook chammed meter just enough.

It is important to achieve such a state of the solution so that it remains compliant and elastic at the same time.

The composition should not smell or lose moisture until the connection with the brick. On average for the preparation of a solution for an oven leaves from 20 to 50 kg of dry powder.

Consistency may vary. The proportions are:

  1. For masonry with seam 3-4 mm, a thick solution of 20 kg of chamotte and 8.5 liters of water is prepared. The mixture is obtained similar to a viscous sour cream or dough.
  2. For seam 2-3 mm need a half-stone solution. The volume of water on the same amount of powder increases to 11.8 liters.
  3. For the thinnest seams, the measureer knead very liquid. By 20 kg of powder accounts for up to 13.5 liters of liquid.

Cooking method you can choose any. Thick solutions are easier to mix manually. Mixers providing uniform connection of all components help to give homogeneity of liquid.

Since the dry meter gives strong dustiness, when conducting work, it is recommended to use a protective mask or respirator.

It is important to know that at first the container is covered in the container. The volume is better to measure immediately so that you do not have to shine anything in the process of mixing. Water pours portion, it is better to take a soft, purified to eliminate possible chemical reactions between substances. The finished mixture should be homogeneous, without lumps and other inclusions, quite elastic. The prepared solution is withstanding about 30 minutes, then evaluate the resulting consistency, if necessary, dilute with water again.

In some cases, the chammertoer is used without additional heat treatment. In this embodiment, methylcellulose is included, which ensures the natural solidification of the composition outdoors. Also as a component can perform chammed sand, allowing to exclude cracking of masonry seams. It is strictly forbidden to use in compositions based on clay cement binder.

The solution with a cold hardening of the mixture is prepared in the same way. Check the correctness of the consistency helps trowel. If when displaced in the direction of the solution, it is not elastic enough – it is necessary to add liquids. Flooring of the mixture – a sign of excess water, it is recommended to increase the amount of thickener.

Facial facilities

The finished solution can be put only on the surface, previously exempted from traces of old masonry mixtures, other contaminants, traces of lime falling. It is unacceptable to use such compositions in combination with a wet-type brick, silicate building blocks. Brick before laying a chamotone meter carefully moisturizes.

If this is not done, the binder will evaporate faster, reducing the strength of the connection.

The order of the masonry has the following features:

  1. The furnace is formed by rows, according to a predetermined scheme. Pre-perform test laying without a solution. Start work always from the corner.
  2. Be sure to be used by trowel, extinguishing.
  3. Filling seams should occur throughout the depth, without the formation of voids. The choice of their thickness depends on the combustion temperature. What it is higher, the thinner should be seam.
  4. Speakers on the surface of the surplus of the solution immediately remove. If this is not done, it will be quite difficult to cleaned the surface.
  5. Grouting is performed using a wet veto or a wedroom brush. It is important that all the inner parts of the channels, the fifthms, other elements were as smooth as possible.

Upon completion of masonry and cloud work, chamotte brick on a solution from the measureer is left for drying in natural conditions.

How to dry

Drying chamotte meter is carried out by repeated furnace extras. With thermal exposure, chamoten brick and the measureer are sintered, forming durable, sustainable bonds. At the same time, the first ignition can be carried out no earlier than 24 hours after the completion of the masonry. After that, the drying is carried out for 3-7 days, with a small amount of fuel, the duration depends on the size of the furnace. Rosge is carried out at least 2 times during the day.

With the first extract, the amount of firewood is laid, corresponding to the duration of burning of about 60 minutes. If necessary, fire is supported additionally, by lining materials. With each subsequent time, the volume of burning fuel increases, seeking gradual evaporation of moisture from bricks and masonry seams.

The prerequisite for high-quality drying is the preservation of an open door and valves – so steam will go out, without falling out in the form of condensate when cooled the furnace.

Fully dry meter changes its color, becomes more hard. It is important to pay attention to the quality of the masonry. It should not be crammed, deformed with proper preparation. If there are no defects, the furnace can be stirred as usual.

How to put a chamotte brick with the help of a follower, you can learn from the following video.

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