Hello Engineers, Today we will Calculate Cement and Sand Quantity for plastering work. Before calculation, We should be know some values that’s given bellow :-
Note:- Point Should Be Know, Before Estimating Mortar Calculation for Plastering work
| Density of Cement | 1440 kg/m3 |
| Density of Sand | 1450-1550 kg/m3 |
| How many kg in 1 bag of cement | 50kg |
| Volume of one cement bag in litres | 34.4722 litres |
| One Bag of cement in cubic metres | 0.0347 cubic meter |
| How many Cubic Feet (CFT) | 1.226 CFT |
| Numbers of Bags in one cubic metre cement | 29 bags approx. |
| Specific gravity of cement | 3.5 |
| Grade of cement | 33, 43, 53 |
We take a wall that’s
Area of brick wall for plaster = 3m x 3m = 9m2
Thickness of Plaster = 12mm (Inner Plaster) = 0.012m
Volume of mortar = 9m2 x 0.012m = 0.108m3
Ratio for Plaster = 1:6
Sum of ratio = 7
Cement Calculation of mortar
Volume ( Dry Volume of Mortar ) = 0.108 x 1.35 = 0.1458 m3
Cement = cement part / sum of ratio x Cement Volume ( Dry Volume of Mortar )
Cement= (1/7) x 0.1458 = 0.0208 m3
Cement = 0.0208 x 1440 (Density of Cement is 1440/m3)
Cement = 29.99 kg
A wall that dimensions 3mtr x 3mtr and 12 mm thickness of plaster require 29.99 kg cement.
If you want know quantity in bags, Than we know in one bag quantity is 50 kg
(29.99/50) = 0.599 Bags
Sand Calculation of mortar
Volume of Sand = (6/7) x 0.1458
Volume of Sand= 0.124m3
Sand = 0.0208 x 1450 (Density of Sand is 1450/m3)
Sand = 181.2 kg
A wall that dimensions 3mtr x 3mtr and 12 mm thickness of plaster require 181.2 kg sand.
Important Point :- The value of various materials like cement, sand, aggregates can be different, but its will a minor difference because density can be change according to zones of all over world. But standard formulas explained in this article.
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