Plastering and Its Types
What is Plastering?
If you would like to understand about plastering, first of all, you've got to find out the term Plaster.
Define Plaster.
Plaster could also be defined as Lean Mortar used mostly for covering masonry surfaces.
They are lean mixes of Binding Materials ( Lime or Cement ) with fillers material like Sand or Crushed stones.
And the process of covering surfaces with Plaster is named Plastering.
They are specially prepared for 2 reasons.
- For Protection.
- For Decoration.
In protective covering, the Plaster saves the Bricks or Stones from Direct Destructive Attacks of Atmosphere like Wind, Rain and Harmful Industrial Gases.
As an ornamental finish, Plasters are wont to give many appealing shades and finish designs to the development .
Cement Plasters.
These are the homogeneous lean mixture of hydraulic cement and sand with water. they need been found suitable for all sort of plastering work like Protective and ornamental Finishes.
The most common proportion for Cement Plasters is ( 1:3 ).
- For external surfaces ( 1:3 )
- For internal surfaces ( 1:4 )
However, the ratio of sand are often increased to the maximum amount as 8 like ( 1:8 ) depending upon the character of construction.
Cement Plasters are generally applied only during a single coat. it's important that the surface of plasters should be kept wet a minimum of for 3 days after its application.
Gypsum Plaster.
These are that sort of plasters during which gypsum is employed as a Binding Material rather than Cement or Lime.
The Gypsum Plaster are commonly used for creating Architectural fancies and ornamental Designs on wall and roofs. Their most vital Properties are:
- They need great resistance to fireside .
- They supply comparatively better insulation against heat and sound.
- They set and harden quickly.
- They undergo little or no expansion and contraction.
Types of Gypsum Plaster.
Following types are commonly used.
- Ready Mix
- Gypsum Neat Plaster
- Keen's Cement Plasters
- Stucco Plasters