Heating and ventilation

Than to cover the oven, so as not cracked

Than to cover the oven, so as not cracked

Over time, the masonry of the furnace, cracking may occur. This is due to the uneven heating of the material from which made the oven. As a rule, fire brick, mortared together with fireclay clay. This clutch is capable of withstanding extreme temperature load, but it is not eternal.

Cracks (if they are through) pose a serious danger to the health and lives of people exploiting such a damaged furnace, as through them in the room gets poisonous carbon monoxide. Accordingly, the question of the incorporation of the damage must be addressed immediately. There are several proven ways, each of which is subject to technology guarantees up to 10 years of excellent service furnace.

«Diagnosis» cracks ↑

First you need to determine how serious the intervention requires the cracked surface. If it is a network of fine cracks, but for the first time can do surface repair is to remove the layer of finish plaster to brick, it’s good to cover up and plaster the furnace. If the injury is seriously affected a tiled veneer or masonry, you will need to disassemble and restore. In any case, you need to learn to work with clay.

Clay + sand = classic method of coating furnaces ↑

The use of clay in the construction and repair of furnaces, the traditional method. This material has universal qualities – plasticity, viscosity, and the firing – strength, fire-retardant properties, durability. The sand acts as a binder, it protects from cracking and chipping of hardened mortar from masonry.

Technology solution preparation ↑

  • In order to properly prepare the refractory mortar will need equal proportions of clay and sand. But first you need to deal with clay is to fill it with water (1 part clay, 3 parts water), leave to razmeshivatsya at least for a day. For this it is convenient to use a large dish, for example, a barrel.
  • Next, the clay solution is stirred and kneaded, if necessary, adding water, filtered on a medium-sized sieve (3?3 mm) and defend. After drained the water and work with prepared purified clay that at density should resemble sour cream.
  • It is now necessary to determine the need for clay in the sand, what these natural substances mixed in small quantities in the ratio 1:1, thoroughly mixed composition and check its quality. For this you need to pay attention to the stick that stirred the solution – if it is much clay, the solution in bold and you should add sand if you stick a few clumps, it is suitable for the job. Sand it is necessary to add 0.5 part, not to be mistaken with the proportions of the components.

Thus, to determine what to prepare high-quality solution to 1 part of clay, for example, 2.5 parts of sand. This is the main stage of the work, as properly prepared, the composition will not crack, firmly pulling the damaged area of the furnace.

Than to cover the oven, so as not cracked

Attention: Additionally, you can conduct another test. From the thick solution make a ball about 5cm in diameter and the cake with a diameter of 10 cm and a thickness of 1 cm of the Product is left at room temperature to dry and observe whether or not cracks – they shouldn’t be. A ball falling from meter height should not disintegrate. In this case, it is the perfect material to work with. If there are cracks, it is necessary to add more clay.

In this video you can trace the technology of preparation of a clay solution:

Than to cover the oven, so as not cracked

It is important Before applying the solution, the furnace need to be strengthened. For this it is wrapped in gauze wetted clay «milk», and give this frame to dry thoroughly. Now you can start plastering.

About the technology of preservation of the furnace find out more from the video:

Non-traditional reinforcing additives ↑

To increase the strength of a clay solution it is saturated with ingredients of natural origin. Usually it’s horse manure and chaff or chopped straw (chaff).

Traditional manufacturing of such building material specific – kneaded his legs. So this mix was enough for the smearing of the furnace, you will need 4 buckets of clay, prepared according to the recipe above, and one bucket of sand and water. Gradually stir this mixture with a sex, you need to achieve the state when the material leaves no residue on your feet, it is evenly promesa, has no lumps and excess fluid. The prepared mortar must cover with a cloth and leave for 12 hours (e.g. overnight), then re-promyat. Now it’s ready to use. By the way, the same reinforcing properties and horse manure containing undigested grass.

Than to cover the oven, so as not cracked

It is important Walls in brick before applying the mortar shall be hydrated. Further, the furnace is coated with the first layer «natural» plaster needs to dry. On the dried surface is placed in the second layer. The furnace should stand for about two weeks. Then cover it with a mixture of sand, starch and water (6:1:2).

Completely oven dry in a month. Only then it is possible to whitewash with lime (preferably in several layers), colored with any color scheme.

Than to cover the oven, so as not cracked

Of course, self-sealing of cracks on the stove – it is a long, time-consuming. However, the final result will certainly be greater spent one to two months – it will continue for years!

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