Cement-lime plaster

Another method for exterior and interior decoration of walls is the use of a cement-lime mortar for plastering. It is used for facing walls made of aerated concrete, concrete and brick . Absolutely not apply this type of plaster for painted and wooden surfaces, as well as for leveling surfaces of any type.

Composition of cement-lime plaster

Consider the composition of cement-lime plaster. The main components of this material are cement, lime and sand. Depending on the purpose of the application, the ratio of the proportions of the components can be adjusted. In addition, you can buy a ready-made dry mortar on the market and just adding water to get started, or you can make it yourself. In this case, you will be able to clearly trace the required proportions. For example, with a decrease in the share of cement and an increase in the proportion of lime, the material will lose its strength, and proportionately increase the hardening time.

Technical characteristics of cement-lime plasters

Technical characteristics of cement-lime plasters include the following:

  1. The time of application of the finished solution is from one hour to two. It depends on the manufacturer and the proportional ratio of the components in the material.
  2. Adhesion or adhesion strength to the wall is not less than 0.3 MPa.
  3. The ultimate compression strength is not less than 5.0 MPa.
  4. Operating temperature -30 ° C to + 70 ° C. According to this technical parameter, the extreme limits are given. This does not mean that this interval is relevant for lime-cement plasters with any composition and any strength.
  5. The material consumption per one square meter averages from 1.5 kg to 1.8 kg in a layer thickness of 1 mm.
  6. Storage is in bags. However, when opening the bag, it is recommended to use it urgently. Since under the influence of environmental factors the material can come to a state not suitable for further use (for example, harden from moisture).
It is recommended to work with cement-lime mortar for plasters at ambient temperatures from + 5 ° C to + 30 ° C. And as for air humidity not less than 60%. It is good if during the drying and hardening of the coating it will be possible to maintain humidity in the range from 60% to 80%. In the case of internal plastering of the room, it will need to be ventilated twice a day, this will help the normal hardening of the cement-lime mortar.