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
- Volume of wall
- The volume of 1 block
- The volume of 1 block with mortar
- No of Blocks
- 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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