Plastering: – This work activity means a thin layer of mortar, applied over the Wall & ceiling masonry, which it acts like a damp-proof coat over the masonry work

Mortar: – Is a mixture of Cement (or) Lime, sand & water, which is used in masonry work in construction to fill the gaps between the bricks and blocks.

How to Calculate Cement, and Sand Quantities in Plastering Work

For Example size of Wall

Length of Wall (L) – 50m, Height of Wall (H) – 4.0m,

Thickness of Plaster (T) – 12 mm (Inner Wall)

STANDART PLASTER THICKNESS

Plaster Area =Length × Height

Plaster Area =50×4 =200.00m²

Volume of Mortar = Plaster Area x Plaster Thickness in meter

Volume of Mortar = 200.00 x 0.012 = 2.40 mᶟ

If Ratio of Plaster is – 1:6 , Which Means 1% of Cement & 6 % of Sand

FORMULA TO FIND THE QUANTITIES OF CEMENT, SAND  IS

Formula = \frac{Dry Volume of mortar  *  Volume of mortar *  Ratio of (Cement /Sand) }{Total Ratio (Cement + Sand)}  

If it is Outer Wall Dry Volume of  mortar -1.33mᶟ

Volume of Mortar -2.4 mᶟ

Ratio of Cement = 1, Ratio of Sand =6, ,  Total Ratio (1+ 6) = 7

Required Quantity of Cement & Sand in 2.4 mᶟ Plastering Work  is

Cement = \frac{1.33 * 2.4 * 1}{ 1 +  6}   = 0.456 mᶟ

Sand= \frac{1.33 * 2.4* 6}{ 1 +  6}   = 2.736 mᶟ

Which Means 1:6 mortar Ratio of Plastering Works  Required,

Cement – 0.456 mᶟ / 1mᶟ of cement Equal to 29 bags of Cement,

So, 0.456x 29 = 13.224 Bags of Cement is required

1 Bag of cement to is Equal to 50Kg, So 50 x 13.224  =661.20 kg Cement Required

Sand – 2.736 mᶟ / 1mᶟ equal to 35.31 cu.ft / cubic foot / ftᶟ

So, 2.736 x 35.31 = 96.608 cu.ft / cubic foot Sand is required