Bricks, Mortar, Cement, & Sand Calculation

                                  Bricks, Mortar, Cement, & Sand Calculation

BRICKS CALCULATION

 

                                             L   (T or W)  (H or D)

Total brickwork wall size  = 10' x 0' - 9"x 10'

                 Volume of wall  =  75cft

 

Actual brick size = 9" x 4 - ¼" x 3"

 

Mortar thickness = ½"               L         B        D

                                    

Volume of one brick with mortar = 9 - ½" x 4 - ½" x 3 - ½"       

Volume of one brick with mortar = 9 - 0" x 4 - ¾" x 3 - ½"

 

Nominal brick size =  0.0866 cft

 

Brick req for 75cft = 75/0.0866

                               = 866.16 nos

 

Add wastage 5-10%  (100+5=105/100=1.05)

 

       Total Brick req = 866.16x1.05 = 909.47 nos

MORTAR CALCULATION

 

Volume of Wall  =  75cft

 

Brickwork volume without mortar

per cft = 1/0.0664   = 15.059 no's

 

Brickwork volume with mortar

per cft = 1/0.0866    = 11.549 no's

 

 

Volume of mortar

= 1- (volume of brickwork with mortar/volume of brick without mortar) x100

= 1 – (11.549 / 15.059) x 100

= 1– 0.766 x 100

= 0.234 x 100

=23.4/100

Mortar thickness ½" = 0.23%

  

 

Constant value 1.33

 

Cement + sand + water = Wet mortar

 

Voids (air + water) = 1/3 = 0.33 = 33%

 

100 cft =100 – 33 = 67  output = 67%

 

if we need 100%

 

 output = 0.67 + 0.33+ 0.33 = 1.33

 

 

 

Mortar ratio for 9" wall = [ 1:5 to 1:6]

Mortar ratio for 4-¼" wall = [ 1:4 to 1:5]

 

for 1/2" mortar thickness = 23 mortar in total volume

Brickwork volume x Mortar volume %

                            = 75 x 0.233

       Wet volume  = 17.481 cft 

 

Dry volume = 1.33 x Wet volume

                    = 1.33x17.481 =23.30 cft

 

  

CEMENT CALCULATION

 

Cement = 23.30 x 1/7 = 3.33 cft

 

One bag cement = 1.226cft / bag

                          = 3.33 / 1.226

                          = 2.716 bags

 

Add wastage 2%. = 2.716 x 1.02 = 2.77    ~ 2¾ bags

 

 

 

SAND CALCULATION

 

For a 1:6 ratio, cement 1 part, and sand 6 part

cement 1 part = 3.33 cft

 

Sand = 6 x 3.33 = 19.98 cft

 

wastage 10%

 

= 19.98 x 1.1 = 21.97  cft 

 

(100 cft = 1 unit) = 21.97/100 = 0.219 unit  ~ ¼ unit

        

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Bricks, Mortar, Cement, & Sand Calculation