How many cement bags required for 3000 sq ft rcc roof slab. To pour a 3,000 square foot, 4″ thick RCC roof slab, you will need a total of 208 bags of cement, 5″ thick – 261 bags and 6″ thick – 314 bags cement with a 1:2:3 mix (cement: sand: aggregate) to achieve a concrete compressive strength of 3,000 psi in 28 days.
Cement is one of the important ingredient of concrete, generally it is mix in concrete due to adhesive and binding nature with fine and coarse aggregate. A small amount of lime is also added in concrete mix to increase the workability and strength of concrete.
There is different grade of concrete such as M20, M25, M30 and so on, used for RCC flat roof slab casting, in this article we used the nominal mix ratio 1:2:3 (1 part cement is mixed with 2 part sand and 3 part aggregate) those prepared mix concrete have compressive strength of 3000 PSI.
Generally roof slab thickness is kept about 4 inch thick at general a standard used for residential building and thickness of 5 to 6 inch for commercial use, in this article we calculate cement required for RCC roof slab at 4 inch, 5 inch and 6 inch thickness.
Roof slab casting is process of laying and putting concrete mix in horizontal direction and structure over brickwork. Cast of roof slab reinforcement main bar and cross bar in distributed over shuttering areas of roof slab and then we put concrete mix of M20 or m25 grade of concrete that is known as roof slab casting.
How many cement bags required for 3000 sqft roof slab?
Roof slab casting is process of laying and putting concrete mix in horizontal direction and structure over brickwork. Cast of roof slab reinforcement main bar and cross bar in distributed over shuttering areas of roof slab and then we put concrete mix of M20 or m25 grade of concrete that is known as roof slab casting.
Generally one bag of Portland cement is weight around 50 kg and their density is 1440 kg/m3.
Calculate how many cement bags required for 3000 sq ft roof slab at 6 inch thick
● Given details:-
1) thickness of roof slab = 6″
2) mix ratios = 1:2:3
3) Area of roof slab = 3000 sq ft
4) Density of cement =1440kg/m3
5) 1 bag cement weight = 50 kg
● Calculation of wet volume of concrete:- you can determine quantity of concrete by calculating its volume by multiplying square footage of roof slab with their thickness such as – 1) thickness in feet = 6/ 12 = 0.5 feet, 2) wet volume of concrete = 3000sq ft × 0.5 feet = 1500 cubic feet, thus you will need 1500 cubic feet of wet volume of concrete for 3000 sq ft rcc roof slab
● Dry volume:- we know that wet volume have voids and pore which filled with water and bubbles it can be remove by vibrator or compressor machine so more quantity of material is required that is dry volume. Volume of dry concrete is increased by 54%, so we can multiply 1.54 in wet volume to calculate dry volume. Dry volume of concrete = 1500 cubic feet × 1.54 = 2310 cubic feet. Thus you will need 2310 cubic feet of dry volume of concrete for 3000 sq ft rcc roof slab
● Mix ratio:- 1:2:3 mix ratio (1 part cement is mixed with 2 part sand and 3 part aggregate) is used for prepairing concrete mix. Add this mix ratio 1+2+3 = 6, part of cement in mix = 1/6.
● Calculate cement for 3000 sq ft roof slab:-
1) cement quantity in cubic feet =1/6 × dry volume of concrete, 2310 ÷6= 385 cubic feet approx
2) cement quantity in cubic meters =1/6 × dry volume of concrete ÷ 35.32, (2310 ÷6) ÷ 35.32 = 10.90 cubic meters approx
3) cement quantity in kg = cement quantity in m3 × 1440 kg/m3 = 10.90 × 1440 = 15696 kg approx
4) cement quantity in No. of bags = cement quantity in kg ÷ 50 kg = 15696 ÷ 50 = 314 bags approx.
Conclusions:-
For a 3000 sq ft rcc roof slab casting at 6 inch thick, generally you will need 314 bags (around 15696 kg) of cement which is approximately equal as 385 in cubic feet or in 10.90 cubic meter by using 1:2:3 (cement: sand: aggregate) mix to gain 3000 Psi compressive strength of concrete in 28 days. Thus 314 bags of cement are required for 3000 sq ft rcc roof slab at 6 inch thick.
Calculate how many cement bags required for 3000 sq ft roof slab at 5 inch thick
● Calculation of wet volume of concrete:-
1) thickness in feet = 5/ 12 = 0.416 feet, 2) wet volume of concrete = 3000 sq ft × 0.416 feet = 1248 cubic feet
● Dry volume of concrete = 1248 cubic feet × 1.54 = 1922 cubic feet. Thus you will need 1922 cubic feet of dry volume of concrete for 3000 sq ft rcc roof slab at 5 inch thick
● Calculate cement for 3000 sq ft roof slab:-
1) cement quantity in cubic feet =1/6 × dry volume of concrete, 1922 ÷6= 320 cubic feet approx
2) cement quantity in cubic meters = volume of concrete in cubic feet ÷ 35.32, (320 ÷ 35.32 = 9.06 cubic meters approx
3) cement quantity in kg = cement quantity in m3 × 1440 kg/m3 = 9.06 × 1440 = 13046 kg approx
4) cement quantity in No. of bags = cement quantity in kg ÷ 50 kg = 13046 ÷ 50 = 261bags approx.
Conclusions:-
For a 3000 sq ft rcc roof slab casting at 5 inch thick, generally you will need 261bags (around 14046 kg) of cement which is approximately equal as 320 in cubic feet or in 9.06 cubic meter by using 1:2:3 (cement: sand: aggregate) mix to gain 3000 Psi compressive strength of concrete in 28 days. Thus 261 bags of cement are required for 3000 sq ft rcc roof slab at 5 inch thick.
◆You Can Follow me on Facebook and
Subscribe our Youtube Channel
Calculate how many cement bags required for 3000 sq ft roof slab at 4 inch thick
● Calculation of wet volume of concrete:-
1) thickness in feet = 4/ 12 = 0.33 feet, 2) wet volume of concrete = 3000 sq ft × 0.33 feet = 990 cubic feet
● Dry volume of concrete = 990 cubic feet × 1.54 = 1525 cubic feet. Thus you will need 1525 cubic feet of dry volume of concrete for 3000 sq ft rcc roof slab at 4 inch thick
● Calculate cement for 3000 sq ft roof slab:-
1) cement quantity in cubic feet =1/6 × dry volume of concrete, 1525 ÷6= 255 cubic feet approx
2) cement quantity in cubic meters = volume of concrete in cubic feet ÷ 35.32, (255 ÷ 35.32 = 7.22 cubic meters approx
3) cement quantity in kg = cement quantity in m3 × 1440 kg/m3 = 7.22 × 1440 = 10396 kg approx
4) cement quantity in No. of bags = cement quantity in kg ÷ 50 kg = 10396 ÷ 50 = 208 bags approx.
ALSO READ :-
How many cement bags required for 3000 sq ft rcc roof slab
How many cement bags required for 2400 sq ft rcc roof slab
How many cement bags required for 2000 sq ft rcc roof slab
How many cement bags required for 1800 sq ft rcc roof slab
How many cement bags required for 1400 sq ft rcc roof slab
Conclusions:-
For a 3000 sq ft rcc roof slab casting at 4 inch thick, generally you will need 208 bags (around 10396 kg) of cement which is approximately equal as 255 in cubic feet or in 7.22 cubic meter by using 1:2:3 (cement: sand: aggregate) mix to gain 3000 Psi compressive strength of concrete in 28 days. Thus 208 bags of cement are required for 3000 sq ft rcc roof slab at 4 inch thick.
Final conclusions:–
For a 3000 sq ft rcc roof slab casting at 4 inch thick, generally you will need 208 bags (around 10396 kg) of cement, at 5 inch thick – 261 bags (around 13046 kg) and at 6 inch thick – 314 bags (around 15696 kg) of cement are required by using 1:2:3 (cement: sand: aggregate) mix to gain compressive strength of 3000 Psi concrete in 28 days.