Plaster mixtures: their varieties and uses

Plaster mixes are a building material intended for plastering walls. They are used for both outdoor and indoor work. This material was in the course of the construction of the pyramids. Cement, lime and gypsum mixtures are known.

In modern construction, plaster mixes made on the basis of the same cement, lime and gypsum are used, but with the addition of various polymer additives, which give the material additional strength, moisture resistance and resistance to the appearance of mold and fungus.

Modern specialists for work have not done stucco mortars themselves for a long time, but they use ready-made mortars. These are dry plaster mixes produced in an industrial way and packaged in bags of 25-50 kilograms. The finished material is diluted with water according to the instructions.

Plaster mixtures can be of the following varieties:

Cement-lime - are used for plastering walls of brick, concrete, foam and gas blocks. Used for internal (for example, a mixture of M-25 for dry premises, M-50 for wet rooms) and outdoor works (for the facade - M-100). This material is made of cement, dry lime, sand and special additives for moisture resistance and plasticity.

Mixtures with synthetic additives. They are characterized by increased ductility and good adhesion to the base. It is used as a primary (base) plaster of walls from any material.

Mixture for interior works - designed for plastering walls in a room with high humidity. It is possible to use this material on a gypsum base.

Stucco mixture façade. With increased moisture resistance. It is applied to brick, concrete and cement-lime plaster.

Gypsum plaster mixes are intended for concrete and bricks. They are applied indoors and outdoors. Can be applied by hand and special machines. After plastering with gypsum mortar, it is not necessary to putty. Walls can be painted or wallpapered at once. Gypsum plaster is used in the event that you do not need to level the surface.

In addition to the basic varieties, there are also special plaster mixtures that have frost-resistant or waterproofing properties. Frost-resistant is designed for leveling complex surfaces, withstands low temperatures to -15 degrees. Waterproofing can be used in a room with a high level of humidity. This mixture has very high ductility.

At work with each kind of plaster mixes the technology. But there are some general rules that need to be adhered to. Walls intended for plastering should be cleaned of old material and if necessary degreased. Before work, it is necessary to determine how complex the surface and what layer of plaster will be applied. This is necessary in order to prepare the necessary material. Not every mixture is suitable for leveling. On average, the plaster layer is applied from 5 to 20 mm, but there is a need to apply a 30 mm layer, this requires special plaster. Dry material is diluted with clean water at room temperature and mixed until homogeneous. The appearance of lumps is unacceptable.