HOW TO CALCULATE THE QUANTITY OF CONCRETE BLOCKS FOR WALLS

The quantity of concrete blocks calculation is very easy and necessary in every blocks wall constructions. For better understanding lets solve this example

Example:

Suppose we have a wall having a length of 14 feet and having a width 10 feet. The thickness of the wall will be 8 inches. Calculate the number of blocks required in this wall. The thickness of the mortar will be



Given Data:

Length     = 14 ft

Height       = 10 ft

Thickness = 8 inch

Blocks =?

Mortar =?

Solution:

The calculation was to be divided into 5 different steps

  1. Volume of wall
  2. The volume of 1 block
  3. The  volume of 1 block with mortar
  4. No of Blocks
  5. volume of Mortar

 

Step 1: volume of wall

volume of wall

Lenght = 14 feet

Height = 10 feet

width = 8 in or 0.666 feet

volume of wall

= lenght  x height  x width

= 14 x 10 x 0.666

= 93.24 cubic feet

 

Step 2: volume of 1 block :

Lenght   = 1 feet

Height    = 8 in or  0.666 feet

width     = 8 in or  0.666 feet

volumeof 1 block

= lenght x height x width

= 1 x 0.666 x 0.666

= 0.4443 cubic feet





Step 3: volume of 1 block with mortar

= Lenght  x height  x width

< mortar thickness = 1 inches or 25mm>

= 1.083  x 0.75 x 0.666

= 0.5414 cubic feet

 

Step 4: No of blocks

No of blocks

= vol of wall/vol of 1 block with mortar

= 93.24 / 0.5414

= 172 no of blocks

The total volume of blocks

= 172 x  0.4443

= 76.41 cubic feet

 

Step 5: Volume of mortar: 

volume of mortar

=  total volume  – the volume of blocks

= 93.24 – 76.41

= 16.83 cubic feet

33% volume will increases in 1 cubic foot when we convert from wet to dry condition so,

the volume of mortar required

= 16.83 x 1.33

= 22.38 cft Ans…

22.83 of mortar is req for the wall.

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