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Home / Civil Engineering / How to Calculate the Quantity of Cement Mortar In Brickwork and Plaster

How to Calculate the Quantity of Cement Mortar In Brickwork and Plaster

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 brick-work, 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.

Calculate the Quantity of Cement Mortar In Brickwork and Plaster

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

Red Brick

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

Fly Ash Brick

The standard size of the fly ash brick is 230-mm x 110-mm x 75-mm 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 1-m3 of brickwork volume.

The volume of the brick work = 1-m3

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 1-m3 = 1/(0.20×0.10×0.10) = 500Nos.

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500 is the number of the bricks required in 1-m3 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

QTY of the Cement Mortar In Brick work Calculation

Let’s Take an example, The length of wall = three mwidth = two m, & thickness of the wall = 0.23-m.

Volume of the Brickwork = 9 x 5 x 0.23 = 10.35-m3

We know that, for one m3 brickwork = 500 Nos required

So, for 10.35-m3 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 ( cu-ft. )

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 mwidth = 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 (32.49-ft3)

1 : 3

9.82

1.03 m3 (36.37-ft3)

1 : 4

7.86

1.10 m3 (38.85-ft3)

1 : 5

6.55

1.15 m3 (40.61-ft3)

1 : 6

5.61

1.18 m3 (41.67-ft3)


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Civil Engineering Technology


2 . For Ten m3 Volume

Mix Ratio

Cement ( Bags )

Sand ( m3 )

1 : 2

130.95

9.17 m3 (323.84-ft3)

1 : 3

98.21

10.31 m3 (364.09-ft3)

1 : 4

78.57

11.00 m3 (388.46-ft3)

1 : 5

65.48

11.46 m3 (404.74-ft3)

1 : 6

56.12

11.79 m3 (416.36 ft3)

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3 . Cement Mortar In Brick Work ( One m3 Brick work )

Nos of Bricks

Mix Ratio

Cement ( Bags )

Sand

500

1 : 2

3.02

0.21 m3 (7.42-ft3)

500

1 : 3

2.26

0.24 m3 ( 8.48-ft3)

500

1 : 4

1.81

0.25 m3 (8.83-ft3)

500

1 : 5

1.51

0.26 m3 (9.18-ft3)

500

1 : 6

1.29

0.27 m3 (9.53-ft3)

4 . Cement Mortar In Brick Work (10m3 Brick work)

Nos of Bricks

Mix Ratio

Cement ( Bags )

Sand

5000

1 : 2

30.18

2.21 m3 (78.05-ft3)

5000

1 : 3

22.64

2.38 m3 (84.05-ft3)

5000

1 : 4

18.11

2.54 m3 (89.70-ft3)

5000

1 : 5

15.09

2.64 m3 (93.23-ft3)

5000

1 : 6

12.94

2.72  m3 (96.06-ft3)


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About Raja Junaid Iqbal

Hi My name is Raja Junaid Iqbal and i am Land Surveyor by Profession but I've specialized in the field of Q,S and land development. As Professional Surveyor I engaged my self in all over the Gulf since 14 years.

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