How much Cement, Sand & Water required for plastering

 

How much Cement, Sand & Water required for plastering 

How much Cement, Sand & Water required for plastering

 

 

 

How much Cement, Sand & Water required for plastering

 

Plastering is the process of applying a smooth and even layer of mortar to the surfaces of walls, ceilings, or other building structures. It helps in providing a protective and decorative coating. The materials required for plastering include cement, sand, and water. The proportion of these materials in the mixture, known as the mix ratio, determines the strength and consistency of the plaster.

Assumptions N0. 1: 

Calculate the quantities of cement, sand, and water required for plastering having an area of 100 m² with a thickness of 12 mm using a mix ratio of 1:4.

The thickness of plaster is uniform throughout the area.

The wastage during the mixing and application process is not considered.

The mix ratio of 1:4 means one part cement and four parts sand by volume.

Calculation:

Step 1: Calculate the volume of plaster

Volume = Area × Thickness

= 100 m² × 0.012 m

= 1.2 m³

Step 2: Determine the quantities of cement, sand, and water based on the mix ratio.

Cement:

Cement quantity = (1/1+4) × Volume

= (1/5) × 1.2 m³

= 0.24 m³

Sand:

Sand quantity = (4/1+4) × Volume

= (4/5) × 1.2 m³

= 0.96 m³

Water:

Water quantity is typically added based on the consistency required for plastering. It is usually around 20% of the combined volume of cement and sand. Therefore,

Water quantity = 0.2 × (Cement quantity + Sand quantity)

= 0.2 × (0.24 m³ + 0.96 m³)

= 0.24 m³

Step 3: Convert the quantities to kilograms (assuming a density of cement = 1440 kg/m³ and sand = 1600 kg/m³).

Cement:

Cement weight = Cement quantity × Density of cement

= 0.24 m³ × 1440 kg/m³

= 345.6 kg

Sand:

Sand weight = Sand quantity × Density of sand

= 0.96 m³ × 1600 kg/m³

= 1536 kg

Water:

Water weight = Water quantity × Density of water

= 0.24 m³ × 1000 kg/m³ (assuming density of water)

= 240 kg

 

Table Summary:

Material	Quantity (m³)	Quantity (kg)
Cement	0.24	345.6
Sand	0.96	1536
Water	0.24	240

 

Assumptions N0. 2:

Area of plaster = 500 m²

Thickness of plaster = 12 mm = 0.012 m

Mix ratio = 1:6

Calculations:

Volume of plaster = Area of plaster x Thickness of plaster = 500 m² x 0.012 m 

= 6 m³

Quantity of cement = Volume of plaster x Mix ratio

 = 6 m³ x 1/7 

= 0.857 m³

Quantity of sand = Quantity of cement x Mix ratio 

= 0.857 m³ x 6 

= 5.142 m³

Quantity of water = 20% of (Quantity of cement + Quantity of sand) 

= 20% of (0.857 m³ + 5.142 m³) 

= 1.028 m³

Table Summary:

Material	Quantity (m³)	Quantity (kg)
Cement	0.857	1250
Sand	5.142	8230
Water	1.028	1028

 

Tips:

• When mixing the plaster, be sure to use clean water.
• Add the water to the cement and sand slowly, mixing constantly, until you reach the desired consistency.
• The plaster should be smooth and workable.
• Apply the plaster to the wall in a smooth, even layer.
• Let the plaster dry completely before painting or wallpapering.

Additional Information:

• The mix ratio for plaster can vary depending on the type of plaster and the desired finish.
• It is always a good idea to consult with a professional plasterer or an engineer if you are unsure of the amount of materials required.
• Plastering is a messy job, so be sure to wear protective clothing and eyewear all the time while plastering.
• Plastering can be a dangerous job, so be sure to follow all safety precautions to save oneself & others life.