How to Calculate the Quantity of Cement Mortar In Brickwork and Plaster
Brick Work Calculation
What Is Brick work. ?
The Bricks work is the laying of brick in the systematic manner with the help of the mortar in the number of layers. In brickwork, bricks are laid horizontally side by side & 1 above the other to make them strong. The structure of formed by placing brick in such a manner is called a brick masonry wall.
Brick work calculations & how to calculated QTY of cement mortar in brickwork & plaster is given below.
How Many Types of Bricks used in Construction?
The three most used bricks used in Building Construction are as follows.
1 . Red Brick
2 . Fly Ash Brick
3 . Hollow Brick
Standard Size of Brick
1 . Red Bricks
The standard Size of the Brick in mm is 190 x 90 x 90 mm ( Length x Width x Thickness)
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The Standard Brick Dimensions Inches is 7.48 In X 3.54 In X 3.54 In (Length x Width x Thickness)
2 . Fly Ash Brick
The standard size of the fly ash brick is 230mm x 110mm x 75mm used in Construction.
3 . Hollow Brick
The standard size of the hollow brick is 30 x 15 x 15cm.
How to Calculate the Number of Brick in a wall
First of all, we do a brick work calculation for 1m^{3} of brickwork volume.
The volume of the brick work = 1m^{3}
Size of the brick with mortar = 20cm x 10cm x 10cm
The Standard size of the brick without mortar = 19cm x 9cm x 9cm.
Nos of the brick required in 1m^{3} = 1/(0.20×0.10×0.10) = 500Nos.
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500 is the number of the bricks required in 1m3 with mortar. It means mortar volume is also calculated in the calculations. So we have to find out the actual numbers of bricks & the QTY of mortar.
Actual volume of the Brick = 500 x (0.19 × 0.09 × 0.09) = 0.7695 m3
Volume of the Mortar = 1 – 0.7695 = 0.2305 m3
Adding ten% wastage = 0.2305 + (0.2305×10/100) = 0.2305 + 0.02305 = 0.25355 m3
As this is the wet volume of the mortar, the dry volume is generally twenty five% more than wet volume.
Add twenty five% Extra volume for the dry volume of mortar.
= 0.25355 + (0.2355 × 25 / 100) = 0.25355 + 0.0633875 = 0.3169 m3
So, from the above calculation we can say that
Nos. of Brick required for one m3 of brick work = 500
Mortar required for one m3 of brick = 0.3169 m3
( Civil Engineering Technology )
How to Calculate the QTY of Cement Mortar in Brickwork & Plaster
1 . QTY of the Cement Mortar In Brick work Calculation
Let’s Take an example, The length of wall = three m, width = two m, & thickness of the wall = 0.23m.
Volume of the Brickwork = 9 x 5 x 0.23 = 10.35m3
We know that, for one m3 brickwork = 500 Nos required
So, for 10.35m3 of the brick work = 500x 10.35 = 5175 Nos.
Now Also , know that for one m3 of the brickwork = 0.3169 m3 of mortar is required
So, for 10.35 m3 of the brickwork = 0.3169 × 10.35 = 3.28 m3
Now, Let us find out the QTY of cement & sand in mortar,
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Mix Ratio 1:4
Consider mortar mix ration is 1:4
one part = cement, four part = sand
Total part = 1 + 4 = 5 part
1 . Cement ( bags )
Cement = 1 / 5 x (volume of the mortar)
= 1 / 5 x 3.28
= 0.656 m3 ( volume of one bag of cement = 0.035 m3 )
= 0.656 / 0.035
Cement = 18.74 bags = 19 bags
2 . Sand ( cuft. )
Sand = 4 / 5 x 3.28
Sand = 2.62 m3
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For Mix Ratio ( 1:6 )
Cement = one part, Sand = Six part
Total Part = 1 + 6 = 7 part
1. Cement ( Bags )
Cement = 1/7 x 3.28
Cement = 0.46 m3 ( One bag volume of the cement = 0.035 m3 )
Cement = 13.14 bags
2. Sand ( cu ft. )
Sand = 6/7 x 3.28
Sand = 2.18 m3
Summary.
1 . For Cement Mortar (1:4)
Cement = 19 bags , Sand = 2.62 m3 ( 92.52 ft3 )
2 . For Cement Mortar (1:6)
Cement = 13 bags, Sand = 2.18 m3 ( 77 ft3 )
Cement Mortar Calculation In The Plasterwork.
Consider a wall having length = fifteen m, width = Eight m with plasterwork thickness = 12 mm (0.012m)
First, Calculate The Volume of Cement Plaster work
Volume of the Cement Mortar in Plastering = 15 x 8 x 0.012 = 1.44 m3
Adding Ten% wastage = 1.44 + 1.44 x (10 / 100) = 1.44 + 0.144 = 1.584 m3 (wet volume of the mortar)
As this is wet volume of the mortar, the dry volume is generally Twenty five% more than wet volume.
Add Twenty Five % Extra volume for the dry volume of mortar.
= 1.584 + ( 1.584 × 25 / 100 ) = 1.584 + 0.1584 = 1.74 m3
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Cement Mortar Mix Ratio = ( 1:4 )
One part cement & Four part sand ( Total Part = ( 1 + 4 ) = 5 part
1. Cement ( One part )
Cement = ( 1 / 4 ) x 1.74
= 0.435 m3 (One bag volume of the cement = 0.035 m3)
= 0.435 / 0.035 = 12.42
Cement = 12.42 bags
2 . Sand ( Four part )
Sand = 4 / 5 x 1.74
Sand = 1.392 m3
Cement Mortar Mix Ration = ( 1:6 )
Cement part = One , Sand Part = Six
Cement = ( 1 / 7 ) x 1.74
= 0.24 m3 ( One bag volume of the cement = 0.035 m3 )
= 0.24 / 0.035 = 7.10
Cement = 7.10 bags
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2 . Sand ( Four part )
Sand = 6 / 7 x 1.74
Sand = 1.49 m3
Summary.
For ( 1:4 ) Mix Cement Mortar : Cement = 12.42 bags, Sand 1.392 m3 ( 49.15 ft3 )
For ( 1:4 ) Mix Cement Mortar : Cement = 7.10 bags, Sand 1.49 m3 ( 52.61 ft3 )
Different Cement Mortar Mix Ratio with Cement & Sand QTY
1 . For One m3 Volume
Mix Ratio 
Cement ( Bags ) 
Sand ( m3 ) 
1 : 2 
13.10 
0.92 m3 (32.49ft3) 
1 : 3 
9.82 
1.03 m3 (36.37ft3) 
1 : 4 
7.86 
1.10 m3 (38.85ft3) 
1 : 5 
6.55 
1.15 m3 (40.61ft3) 
1 : 6 
5.61 
1.18 m3 (41.67ft3) 
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2 . For Ten m3 Volume
Mix Ratio 
Cement ( Bags ) 
Sand ( m3 ) 
1 : 2 
130.95 
9.17 m3 (323.84ft3) 
1 : 3 
98.21 
10.31 m3 (364.09ft3) 
1 : 4 
78.57 
11.00 m3 (388.46ft3) 
1 : 5 
65.48 
11.46 m3 (404.74ft3) 
1 : 6 
56.12 
11.79 m3 (416.36 ft3) 
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3 . Cement Mortar In Brick Work ( One m^{3} Brick work )
Nos of Bricks 
Mix Ratio 
Cement ( Bags ) 
Sand 
500 
1 : 2 
3.02 
0.21 m3 (7.42ft3) 
500 
1 : 3 
2.26 
0.24 m3 ( 8.48ft3) 
500 
1 : 4 
1.81 
0.25 m3 (8.83ft3) 
500 
1 : 5 
1.51 
0.26 m3 (9.18ft3) 
500 
1 : 6 
1.29 
0.27 m3 (9.53ft3) 
4 . Cement Mortar In Brick Work (10m^{3} Brick work)
Nos of Bricks 
Mix Ratio 
Cement ( Bags ) 
Sand 
5000 
1 : 2 
30.18 
2.21 m3 (78.05ft3) 
5000 
1 : 3 
22.64 
2.38 m3 (84.05ft3) 
5000 
1 : 4 
18.11 
2.54 m3 (89.70ft3) 
5000 
1 : 5 
15.09 
2.64 m3 (93.23ft3) 
5000 
1 : 6 
12.94 
2.72 m3 (96.06ft3) 
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