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Some useful information and formulas in civil engineering field
In the civil engineering section, you will obtain certain essential details and formulae regarding the steel bars’ weight for each meter, engineering materials’ weight, criterion conversion figures/factors, concrete grades, and more.
Specified underneath, the steel bars’ weight for each meter:
- Bar having 6 mm diameter, the weight is 0.222 kg
- Bar having 8 mm diameter, the weight is 0.395 kg
- Bar having 10 mm diameter, the weight is 0.616 kg
- Bar having 12 mm diameter, the weight is 0.888 kg
- Bar having 16 mm diameter, the weight is 1.578 kg
- Bar having 20 mm diameter, the weight is 2.466 kg
- Bar having 25 mm diameter, the weight is 3.853 kg
- Bar having 32 mm diameter, the weight is 6.313 kg
- Bar having 40 mm diameter, the weight is 9.865 kg
Specified subsequently, the information of criterion conversion figures/factors:
- 1 inch is equal to 25.4 mm
- 1 foot is equal to 0.3048 m
- 1 yard is equal to 0.9144 m
- 1 meter is equal to 3.28 ft
- 1 mm is equal to 0.0394 inch
- 1 mile is equal to 1.6093 km
- 1 Newton is equal to 0.10 kg
Specified subsequently, the unit weight of various categories of engineering materials:
- Bitumen is equal to 1340 kg/m3
- Cement is equal to 1440 kg/m3
- Cast Iron is equal to 7650 kg/m3
- Steel is equal to 7850 kg/m3
- Ice is equal to 913 kg/m3
- Petrol is equal to 690 kg/m3
In accordance with their associated compressive strength / force, concrete grades are represented as M5, M10 and M30.
The “M” indicates concrete mix design succeeded by the compressive strength figure in N/mm2
With regard to M10 concrete, it signifies that the concrete includes 10 N/mm2 specific compressive strength on 28 days.
- Mix ratio is 1:3:6 [For M10 grade of concrete]
- Mix ratio is 1:4:8 [For M5 grade of concrete]
- Mix ratio is 1:1:2 [For M25 grade of concrete]
- Mix ratio is 1:1.5:3 [For M20 grade of concrete]
- Mix ratio is 1:2:4 [For M15 grade of concrete]
Steel bars’ weight is calculated through the subsequent formula:-
W is equal to (D ^ 2 x L) / 162
D denotes the bars’ diameter.
L denotes the steel bars’ whole length wherefore the weight must be computed.
Like for example, in instance of calculating 20 mm steel bars’ weight, the computation is made as W = 20 ^ 2/162 = 2,466 kg / meter
A conversion factor denotes a figure utilized to change a set of units to a different through dividing or multiplying it. At the time of modifying, the appropriate conversion factor to a similar value must be utilized. Like for example, to change inches to feet, the appropriate conversion value must be 12 inches that is equal to 1 foot.
