Different types of plasters in building construction
Various types of plasters are used in building construction. It is sorted on the basis of the material that is employed to produce plastering paste.
Types of Plaster in Building Construction: Given below, some common types of plasters in building construction -
1. Cement Plaster: This type of plaster is mostly applied in building construction.
The main constituents of cement plaster are Cement and sand.
It is employed in both interior and exterior surfaces.
Method Of Cement Plastering: Ready-made cement plaster is available in the market in dry condition. It is required to blend water to that dry powder for producing plastering paste. At the time of mixing water, abide by the specification supplied by the manufacturer.
The cement plaster can also be formed on the job site with the amalgamation of cement and sand. Normally, manually mixing mortar is frequently utilized.
When cement and sand are used, the proportion should be 1:3 or 1:4 based on the purpose of plastering. Proportion of 1:4 signifies that one unit of cement will be blended with four units of sand.
Once the cement and sand is blended in the dry state correctly, the necessary quantity of water is included with the mix. As soon as the water is mixed, it is then applied to the surface. The thickness of cement plaster changes according to the surface condition. It ranges from 12mm to 25mm. It is usually provided in one coat.
2. Clay Plaster: When clay or mud is applied to develop the plastering mortar, it is known as clay plaster or mud plaster. Mud and Sand are the main constituents of clay plaster.
Clay Plastering Process:
To develop the plaster paste, clay and sand are amalgamated in dry state and then water is included with the mix.
The method for developing the surface of clay plastering is equivalent to the cement plastering.
The clay plaster is generally employed in two coats. The thickness of the 1st coat is about 18mm whereas the 2nd coat is 6mm.
3. Gypsum Plaster: Gypsum plaster is considered as good substitute to cement plaster.
Gypsum is applied as binding material in gypsum plaster. It is generally available in the ready-mix bag in the market.
Gypsum Plastering Process:
It is required to include water with the ready mix powder.
The process of gypsum plaster is equivalent to the cement plaster.
The thickness of gypsum plaster should be retained as 6mm to 12mm.
4. Lime Plaster: If lime is applied as a binding material for developing the plastering mortar, it is known as lime plaster.
Lime plaster is formed by amalgamating hydrated lime, sand, and water.
Lime Plastering Process.
The process of lime plastering is equivalent to the process of cement plastering.