Baryte plasters: material features. Tips for applying and selecting barite plasters

Barite plaster refers to special typesbuilding materials. Its feature is protection from radiation. Most often it is used in medical institutions, in enterprises, in research laboratories, but it is also suitable for living quarters.

General concept

Barite plasters are drycement-sand mixture. In contrast to conventional plaster, they include barium sulfate concentrate. It is this filler that is responsible for the specific properties of the material. The role of an astringent is high-grade cement, and there are various plasticizers that are responsible for the plasticity of the solution.

The barite sand included in their composition completely replaces the use of lead sheets. It is a cheaper way to protect against gamma radiation, but no less effective.

Application

Barite plaster should be applied correctly onwall. To do this, you need to have certain skills. In principle, the application technology resembles the work with conventional solutions. However, there are some nuances:

Surface preparation. The old furnishings fend off completely, the walls are primed and only after their complete drying is applied barite plaster.
The application technique is such that if its layer has a thickness of more than 30 mm, then a special net must be filled on the surface of the wall. It will create the strongest and most reliable connection of the solution with the substrate.
The mixture is applied in several layers. The thickness of each of them should not exceed 10-15 mm. It is necessary to withstand the time of their drying, in some cases it can be up to 3 days.
Each layer is additionally processed priming solutions.
The process of applying baryte plaster is by beacon, which are removed immediately after setting the solution.
Work should be performed in a room with a temperature from 15 to 20 ⁰FROM.
Plaster consumption per 1 sq. M. m is about 20 kg, provided that the applied layer will not be thicker than 10 mm.

Scope of application

Most often this kind of plaster is used inThe premises where they conduct surveys using special equipment that is the source of gamma radiation. These are medical centers, hospitals, X-ray rooms, as well as enterprises engaged in specific research.

In order to stop the penetration of radiation,The walls are lined with lead sheets, but this method is quite expensive. Alternatively, the application of baryte plaster to the surface of a layer of not less than 25 mm. The coating of such a thickness has the properties of lead and is its worthy replacement. Since sheets of such metal are a scarce commodity, its use is not very common in comparison with plaster.

Material Features

Barite plasters are a specific kind of building materials, so when working with them you need to know their features. We list the main of them:

If the room has wooden walls, then the applied layer of plaster should be increased by 1 cm or more.
To ensure complete protection against radiation, the solution is applied from both sides. That is, the surface of the walls is processed both outside the room and inside.
The minimum thickness for the ceiling is 5 mm, the floor and walls - 30 mm.
Baryte plaster is applied only by hand withusing special tools designed to carry out similar work. The layers are applied sequentially, after the previous ones dry out, the thickness of which should not exceed 5 mm.
It is very important to observe the worka certain temperature regime and maintain a high humidity in the room. Such conditions must be observed at the end of the work for 2 weeks. The optimum indoor temperature is 15-20 ⁰FROM.

How to choose barite plaster?

The manufacture of this kind of plaster does not deal with so many manufacturers. The most qualitative are:

Baryte plaster Fullmix, it includes astringent cement, barite sand and plasticizers. The cost of one package - from 700 rubles.
Sorel Barit M150 contains barite concentrate,magnesian cement, polymer and mineral additives, responsible for the basic qualities of the solution. Approximate price - 1500 rubles (20 kg of dry plaster and 5 liters of zatvitel).
Mixtures of "Runit" and "Rosi" in composition are identical to Fullmix.
"Alfapol ShT-Barit" is a dry mix with magnesian astringent cement and barium concentrate. The cost varies from 800 to 1000 rubles.

The above mixtures before application are sufficientOnly dilute with water, maintaining a certain consistency. However, if necessary, you can independently prepare the solution by purchasing all the components separately.

Preparatory work

Barite plasters, like any other species,Apply only to a pre-prepared surface. To do this, completely remove the old coating, clean the base of dust and dirt and then treat with a special primer mix. Depending on the thickness of the applied layer, the reinforcing mesh is filled, which ensures a reliable and strong adhesion of the plaster solution to the base of the surface.

Baryte plasters: work rules

The dry mixture is diluted with water in a ratio of 1 kg to 200 ml. The liquid should be at room temperature: approximately 20 ⁰FROM. You can mix it manually or use a special construction mixer. The finished solution should have a uniform consistency. After mixing, it is necessary to stand for 5-8 minutes and only after that you can directly start applying.
The total thickness of the plaster layer can be up to 1 cm. However, it can only be applied sequentially, divided into several stages.
When plastering with barite solutions is notdrafts in the room are allowed. During work and after their completion within 2 weeks, it is recommended to completely prevent direct sunlight from reaching the surface.
The finished mixture is applied using conventional tools that are used for plastering surfaces.

The building material, which includesBarium sulphate concentrate is indispensable for finishing rooms with a high level of gamma radiation. In order to completely protect people from possible radiation, it is necessary to strictly follow the instructions and rules when working with this type of plaster.

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