Thumb rule for concrete work
The concrete ingredients will be vary based
on the mix ratio,
For Example,
If the Plinth area is 100 Sq.ft (10 x 10)
and the required concrete volume is 100 x 0.04 = 4 Cum with M5 mix ratio means
Now from the below table which is for 1 m3
Required Concrete ingredients for 4 m3 of
M5 is
Cement – 2.77 x 4 = 11.08 bags
Sand – 0.48 x 4 = 1.92 cum
Coarse aggregate = 0.96 x 4 = 3.84
cum
Thumb Rule of Concrete material requirement
Grade Ratio Cement in Bags Sand in Cum Coarse
Aggregates in Cum
M5 01:05:10 2.77 0.48 0.96
M7.5 01:04:08 3.41 0.047 0.95
M10 01:03:06 4.44 0.46 0.92
M15 01:02:04 6.34 0.44 0.88
M20 01:05.5
8.06 0.42
0.84
M25 01:01:02 11.09 0.39 0.77
Thumb rule for Plastering Work
For plastering, the material quantity will
vary based on the different mix ratio like concrete and the thumb rule for
plastering work has listed below.
Type of Plastering Mix ratio Thickness
in mm Cement Bags/Sqm Sand Cum/Sqm
Inner Plastering 1:3 15 0.16 0.017
External Plastering 1:4 20 0.17 0.024
Rough Plastering 1:5 16 0.11 0.020
Ceiling Plastering 1:2 12 0.17
Thumb rule for Brick Work
The size of brick 190mm x 90mm x 90mm
Number of bricks per cum = 500 Nos
Must read: How to calculate the number of
bricks
Mix Ratio and brickwork thickness Mortar
Thickness in mm Cement in
Bags Sand in Cum
1:6 200mm Thk 10 1.4 /
Cum 0.30
1:5 200mm Thk 10 1.7 /
Cum 0.25
1:4 100mm Thk 10 0.15 / Sqm 0.035
1:5 200mm Thk Block 10 0.15 /
Cum 0.02
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