How to calculate No.of Bricks, Cement, Sand quantity for Brickwork?

Q:- For an area of 150 m² with wall thickness 10 cm find
(i) No. of bricks
(ii) C:M required for Brick work with ratio 1:6

Solution:

Assuming:-

  1. Brick size = 19cm x 9cm x 9cm
  2. Thickness of mortar = 10 mm

Volume of brickwork = Area x Thickness of wall

                                             = 150 x 0.10

                                             = 15 m³

Quantity of Bricks:-

No. of bricks         =         Volume of brickwork           
                                         volume of 1 brick with mortar

        = 15/0.002

     ∴ No. of bricks = 7500 bricks 

Volume of 1 Brick with mortar = 0.20×0.10×0.10=0.002 m³

CM required for brickwork:-

Volume of total no.of bricks = (0.19×0.09×0.09) x 7500 

                                                      = 0.001539 x 7500

                                                      = 11.5425 m³

Quantity of mortar = Quantity of brickwork – Volume of bricks

Quantity of mortar = 15 – 11.5425

                                       = 3.4575 m³

Mix Ratio –> 1:6

Dry volume of mortar = Wet volume x 1.33

 ∴Dry volume of mortar = 3.4575 m³x 1.33

                                               = 4.5985 m³

Quantity of cement:-

Quantity of Cement = Dry Volume of mortar x Cement ratio
                                                         Sum of the ratio

∴Quantity of cement = (4.5985 x 1) /(1+6)

                                         =  0.6569 m³

Density of Cement = 1440 kg/m³

∴ Weight of Cement = 1440 x 0.6569

                                        = 945.972 Kg

1 bag of cement contains 50 kg of cement

∴ Number of bags = 945.972 Kg / 50 kg

                                    = 18.919 No’s

Quantity of Sand:-

Cement : Sand :: 1:6

Quantity of Sand = Quantity of Cement x 6

∴ Quantity of Sand = 0.6569 m³x 6

                                      = 3.9414 

1 m³=35.3147 Cubic Feet (CFT)

∴ Quantity of sand = 3.9414 x 35.3147

                                     = 139.189 CFT

Density of sand = 1650 kg/m³

∴ Weight of the sand = 3.9414  x 1650

  = 6503.31 kg

  =6.50331 tonnes 

Watch the video given in the link below, for better understanding and detailed explanation

Easy method to CALCULATE NO OF BRICKS AND QUANTITY OF CEMENT & SAND in BRICKWORK

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