Plaster mixes are a building material designed for plastering walls. They are used for both outdoor and indoor work. This material was in use even with the builders of the pyramids. Cement, lime and gypsum mixtures are known.
In modern construction, plaster mixtures are used, made on the basis of the same cement, lime and gypsum, but with the addition of various polymer additives, which make it possible to give the material additional strength, moisture resistance and resistance to mold and fungus.
Modern specialists for work no longer make plaster solutions themselves, but use ready-made ones. These are dry plaster mixtures produced industrially 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 - used for plastering walls made of brick, concrete, foam and gas blocks. Used for internal (for example, a mixture of M-25 - fordry rooms, M-50 - for wet) and outdoor work (for the facade - M-100). This material is made from cement, dry lime, sand and special additives for moisture resistance and plasticity.
Mixes with synthetic additives. They are distinguished by increased plasticity and good adhesion to the base. It is used as a primary (base) wall plaster of any material.
Mixture for interior work - designed for plastering walls in a room with high humidity. It is possible to use this material on a plaster base.
Facade plaster mix. With increased moisture resistance. Applicable on brick, concrete and cement-lime plaster.
Gypsum plaster mixtures are designed for concrete and brick. Used indoors and outside the building. Can be applied by hand or by special machines. After plastering with gypsum mortar, there is no need to putty. Walls can be immediately painted or wallpapered. Gypsum plaster is used if it is not necessary to level the surface.
In addition to the main 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 down to -15 degrees. Waterproofing can be used indoors with high levels of humidity. This mixture has very high plasticity.
Working with each type of plaster mixes has its own technology. But there are some commonrules to be followed. Walls intended for plastering must be cleaned of old material and, if necessary, degreased. Before work, it is necessary to determine the complexity of 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 a special plaster. Dry material is diluted with clean water at room temperature and stirred until a homogeneous mass. The appearance of lumps is unacceptable.
