HOW TO CALCULATE BRICKS, CEMENT, AND SAND QUANTITY IN 9″ BRICK WALL

Quantity of Bricks:-

Assuming:-

•Brick size = 9”x4.5”x3” 
•Thickness of wall = 9”
•Thickness of mortar = 0.39
•Brick size with mortar= (9+0.39)x(4.5+0.39)x(3+0.39) = 9.39”x4.89”x3.39” •

             No. of bricks = Volume of Brickwork/ Volume of 1 Brick with mortar

Volume of 1 Brick = (9/12)x(4.5/12)x(3/12)= 0.75’x0.375’x0.25’ = 0.070 CFT

Volume of 1 Brick with mortar = 0.783’x0.408’x0.283’=0.090 CFT.

Volume of Brickwork = 10’ x 6’ x 0.75’ = 45 Cubic Foot (CFT) 

No. of bricks = Volume of Brickwork/ Volume of 1 Brick with Mortar

No. of bricks = 45 CFT/ 0.090 CFT

= 500 No’s

Brick wastage–> 5 to 10 %

Consider 10% brick wastage,

∴ No. of bricks= 500  + (500 x 0.1)

= 550 No’s

Quantity of cement:-

Quantity of mortar = Quantity of brickwork – Volume of Bricks

Volume of bricks =0.070 CFT x 500 No’s = 35 CFT

Quantity of mortar = 45 – 35

                                     = 10 CFT

Mix Ratio –> 1:5

Dry volume of mortar = Wet volume x (1+0.33) (33% of volume)

Dry Volume of mortar= 10 x 1.33 = 13.3 CFT

Consider 5% wastage of mortar.

Dry volume of mortar = 13.3 + (13.3 x 0.05) = 13.3+0.665 = 13.965 ≊ 14 CFT

Quantity of Cement = {(Dry Volume of mortar x Cement ratio) / (Sum of the ratio)}

∴Quantity of cement = (14 x 1) /(1+5)=2.333 CFT

Density of Cement = 1440 kg/m³                 

1 m³=35.3147 Cubic Feet (CFT)

∴ Quantity of Cement = 2.333/35.3147 = 0.066 m³

∴ Weight of Cement = 1440 x 0.066 = 95.04 Kg

1 bag of cement contains 50 kg of cement

∴ Number of bags = 95.04 Kg / 50 kg = 1.90 No’s (Say 2 No of bags)

Quantity of Sand:-

Cement : Sand :: 1:5

Quantity of Sand = Quantity of Cement x 5

∴ Quantity of Sand = 2.333 x 5= 11.665 CFT

1 m³=35.3147 Cubic Feet (CFT)

∴ Quantity of sand = 11.665/35.3147 = 0.330 m³

Density of sand = 1600 kg/m³

∴ Weight of the sand= 0.330 x 1600= 528 kg (0.528 tonnes)

From the link below you can find the video for this blog, watch it for a clear understanding & detailed explanation.

9-Inch wall Bricks, Cement and Sand calculations

2 Comments

  1. Dear sir please give me the no of bricks and cement bag number to construct 7.65*7.65*1.8 m and wall thickness is 0.23m
    Early response in this regard is highly appreciated

    Like

  2. Dear sir please give me the no of bricks and cement bag number to construct 7.65*7.65*1.8 m and wall thickness is 0.23m
    Early response in this regard is highly appreciated

    Like

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