Cement Plaster a cement mortar coating in a set proportion (sand/cement mix) according to specification. It is used thinly to smoothen rough brick surfaces. The plaster should be able to connect with the masonry surface effectively.
Plastering is the application of plaster mortar to a surface to protect it from precipitation and other atmospheric pollutants.
Advantages Of Cement Plastering
- Cement plastering offers a smooth and completed surface to the stonework.
- It enhances the look of the structure.
- Plaster defends against rainwater penetration and other atmospheric contaminants.
- It functions as a damp-proof covering over brick masonry construction.
- Plastering conceals porous components and provides a suitable surface for painting/whitewashing.
Plastering Work Procedure
Preparation Of Surface For Plastering
- Surface preparation for plastering: To provide plaster with a firm bond, mortar joints should be roughened.
- Clean all surfaces and joints using a wire brush. There should be no oil, grease, or efflorescence stains on the plastered surface.
- Fill any gaps or voids in the surface with an appropriate substance.
- Rake the mortar joint until it is 12 mm deep to ensure appropriate bonding.
- Wash the mortar joints and the wall before plastering. Keep it wet for at least 6 hours.
- If your wall projection is more than 12 mm, you can remove it and produce a uniform wall surface. This will reduce the amount of plaster necessary.
Preliminary Groundwork For Under Coat And Base Coat
- To guarantee regular plastering thickness, dots should be placed on the wall every 2 m horizontally and vertically. A dot is a 15 × 15 cm plaster area with a thickness of around 10 mm.
- The verticality of the plumb bob is tested, and screeds are built to the thickness necessary in the 2mx2m zones.
Method For Applying The First Coat Or Base Coat
- The cement-to-sand ratio in the first layer of plaster varies between 1:3 and 1:6.
- The initial layer plaster thickness for brick masonry is 12mm. The thickness of concrete masonry varies between 9 and 15 mm.
- Apply the first layer of plaster to the wall surface between the plaster repairs. This may be done using a trowel. You can level the surface with flat wooden floats or straight wooden edges.
- The initial coat should be set but not dry. Roughen the key for the second layer with a scratching tool.
- The first coat should be damp/wet before applying the second coat.
- The finishing coat is the final coat of plaster that must be put in to complete the plaster. For the second or final layer, the cement mortar ratio might range from 1:4 to 1:16 in thickness.
- To avoid joining marks, apply the final coat from top to bottom.
- It is advised that you keep the plastering moist for at least seven days after applying both plastering layers. This will allow it to solidify and strengthen.
- Incorrect curing might result in plasterwork cracks or efflorescence. Gunny bags can be used to keep the surface wet while curing.
Things To Remember After Plastering
- After the repair is finished, clean out all door and window frames.
- The cure should begin when the plaster has dried. Plaster should be allowed to cure for seven days.
- The cure will commence within 24 hours of the plaster being put in.
Plastering Methods And Machines
Plaster and mortar application is a critical and time-consuming task in building construction. Plaster and mortar are required for structural stability. Plastering can be used on external walls, internal walls, and ceilings. It is a time-consuming and labor-intensive technique. Wall plastering is presently done by hand in practically every corner of the world. Wall plastering is labor-intensive and time-consuming.
The Following Are The Goals Of Utilizing A Machine To Plaster
Compared to conventional plastering procedures, the following aims can be met using a plastering machine.
- The Machine will lower the quantity of work required and hence the labor expenses. This component is only attainable under extraordinary situations, as labor employment is crucial for any country. Machines, on the other hand, require expert personnel to operate.
- It reduces mortar waste and lowers building expenses.
- Fast plaster coverage might help you achieve higher precision.
- The Machine is portable so that it can be transported simply from one site to another.
- Plastering costs per square meter can be decreased in large-scale building projects.