1.Concrete
mix design for M-10 (1:3:6) grade of concrete:
As we know that when we pour wet concrete during concreting, it hardens after certain standard time. In view of this, it was decided by the Civil Design Engineers to take a factor of safety from 1.54 to 1.57 .
so we can say, Volume of dry concrete = 1.54 to 1.57 times the volume of wet concrete
I m assuming 1.54 as a safety factor
Therefore, the total volume of concrete required is 1.54㎥.
As per IS456:2000, M-10 Grade concrete proportion is = 1 : 3 : 6
Remember,
here (1:3:6) indicates:
1
for cement
3
for sand
6
for aggregate
Total
volume (cement + sand + aggregate) = 1 + 3 + 6= 10
Calculation
of Volume of Cement in 1㎥ of Concrete
Volume of cement= (cement/cement+sand+aggregate) x 1.54
Quantity of cement= (cement/total volume) x1.54
= (1/10)x1.54
= 0.154 ㎥
we know , Volume of a one cement bag =0.0347 ㎥
Thus Total no. of bags required for 1 ㎥ = 0.154/0.0347
= 4.52 bags
Hence, we require 4.52 bags of cement for 1 cu.m of
concrete.
As
we know, 1 Bag of cement weighs 50 kg (one bag of
cement)
so For 1㎥ of concrete we have ,
Total no. of bags required x 50 kg of cement = 4.52 x 50 = 226 kg
For 1㎥ of
Concrete = 226 Kgs of Cement is required.
Calculation of Volume of Sand (Fine Aggregate) in 1㎥ of Concrete:
Volume of sand= (sand/cement+sand+aggregate) x 1.54
Quantity of sand = (sand/total volume) x1.54
= (3/10)x1.54
= 0.462 ㎥
1㎥ of sand = 1600-1800 kg
Assume 1600 kg
= 739 kg
Hence we require 739 kg of sand
for 1 cu.m of concrete.
Calculation of Volume of Coarse Aggregate in 1㎥ of Concrete:-
Volume of aggregate= (aggregate/cement+sand+aggregate) x 1.54
Quantity of aggregate= (aggregate/total volume) x1.54
= (6/10)x1.54
= 0.924 ㎥
1㎥ of aggregate = 1500-1800 kg
Assume 1500 kg
= 1386 kg
Hence we require 1386 kg of aggregates (20
mm) for 1 cu.m of concrete.
Water required for 1㎥ of concrete: -
Water is added for making the concrete mass and it depends upon the climatic
conditions whether hot or cold weather and workability.
We typically maintain a 0.35–0.50 to water cement ratio. Remember, the above values may change according to the moisture content present in the sand and aggregates.
Cement
Required for 1㎥of Concrete = 226 Kgs
Assume
W/C ratio = 0.45
Water
required for 1㎥ of Concrete = 226 x
0.45
Amount of water required for 1㎥ of Concrete = 102 kgs = 102 litres.
Hence 180 Litres of Water is required for 1㎥ of M10 Concrete.
2.Concrete mix design for M-15
(1:2:4) grade of concrete:
Remember, here (1:2:4) indicates:
1
for cement
2
for sand
4
for aggregate
Total
volume (cement + sand + aggregate) = 1 + 2 + 4= 7
Calculation of Volume of Cement in 1㎥ of Concrete
Volume of cement= (cement/cement+sand+aggregate) x 1.54
Quantity of cement= (cement/total volume) x1.54
= (1/7)x1.54
= 0.22 ㎥
we know , Volume of a one cement bag =0.0347 ㎥
Thus Total no. of bags required for 1 ㎥ = 0.22/0.0347
= 6.47 bags
Hence, we require 6.47 bags of cement for 1 cu.m of concrete.
As we know, 1 Bag of cement weighs 50 kg (one bag of cement)
so For 1㎥ of concrete we have ,
Total no. of bags required x 50 kg of cement = 6.47 x 50 = 324 kg
For 1㎥ of
Concrete = 324 Kgs of Cement is required.
Calculation of Volume of Sand (Fine Aggregate) in 1㎥ of Concrete:
Volume of sand= (sand/cement+sand+aggregate) x 1.54
Quantity of sand = (sand/total volume) x1.54
= (2/7)x1.54
= 0.44 ㎥
1㎥ of sand =
1600-1800 kg
Assume 1600 kg
0.44㎥ of sand =1600
x 0.44
= 704 kg
Hence we
require 704 kg of sand for 1 cu.m of concrete.
Calculation of Volume of Coarse Aggregate in 1㎥ of Concrete:-
Volume of aggregate= (aggregate/cement+sand+aggregate) x 1.54
Quantity of aggregate= (aggregate/total volume) x1.54
= (4/6)x1.54
= 0.88 ㎥
1㎥ of aggregate
= 1500-1800 kg
Assume 1500 kg
0.88㎥ of
aggregate =1500 x 0.88
= 1320 kg
Hence we
require 1320 kg of aggregates (20 mm) for 1 cu.m of concrete.
Water required for 1㎥ of concrete: -
Cement
Required for 1㎥of Concrete = 324 Kgs
Assume
W/C ratio = 0.45
Water
required for 1㎥ of Concrete = 324 x
0.45
Amount of water required for 1㎥ of Concrete = 102 kgs = 146 litres.
Hence 180 Litres of Water is required for 1㎥ of M15 Concrete.
3.Concrete mix design for M-20 (1:1.5:3) grade of concrete
For
that article click M-20 Mixcalculation.
4.Concrete mix design for M-25 (1:1:2) grade of concrete:
Remember,
here (1:1:2) indicates:
1
for cement
1
for sand
2
for aggregate
Total
volume (cement + sand + aggregate) = 1 + 1 + 2= 4
Calculation of Volume of Cement in 1㎥ of Concrete
Volume of cement= (cement/cement+sand+aggregate) x 1.54
Quantity of cement= (cement/total volume) x1.54
= (1/4)x1.54
= 0.385 ㎥
we know , Volume of a one cement bag =0.0347 ㎥
Thus Total no. of bags required for 1 ㎥ = 0.308/0.0347
= 11.3 bags
Hence, we require 9.05 bags of cement for 1 cu.m of concrete.
As we know, 1 Bag of
cement weighs 50 kg (one bag of
cement)
so For 1㎥ of concrete we have ,
Total no. of bags required x 50 kg of cement = 11.3 x 50 = 565 kg
For 1㎥ of
Concrete = 565 Kgs of Cement is required.
Calculation of Volume of Sand (Fine Aggregate) in 1㎥ of Concrete:
Volume of sand= (sand/cement+sand+aggregate) x 1.54
Quantity of sand = (sand/total volume) x1.54
= (1/4)x1.54
= 0.385 ㎥
1㎥ of sand =
1600-1800 kg
Assume 1600 kg
0.385 ㎥ of sand =1600
x 0.385
= 616 kg
Hence we
require 616 kg of sand for 1 cu.m of concrete.
Calculation
of Volume of Coarse Aggregate in 1㎥ of
Concrete:-
Volume of aggregate= (aggregate/cement+sand+aggregate) x 1.54
Quantity of aggregate= (aggregate/total volume) x1.54
= (2/4)x1.54
= 0.77㎥
1㎥ of aggregate
= 1500-1800 kg
Assume 1500 kg
0.77㎥ of
aggregate =1500 x
= 1155 kg
Water required for 1㎥ of concrete: -
Cement Required for 1㎥of Concrete = 565 Kgs
Assume
W/C ratio = 0.45
Water
required for 1㎥ of Concrete = 565 x
0.45
Amount of water required for 1㎥ of Concrete = 254 kgs = 254 litres.
Hence 254 Litres of Water is required for 1㎥ of M25 Concrete.
Summary: –
M-10 grade. concrete.
4.52 bags of cement required for 1 cu.m of M-10 grade. concrete.
739 kg of
Sand required for 1 cu.m of M-10 grade concrete.
1386 kg of
20mm Aggregate is required for 1 cu.m of M-10 grade concrete.
102 litres of water is required for 1 cu.m of M-10 grade concrete
M-15 grade. concrete
6.47 bags of cement required for 1 cu.m of M-15
grade. concrete.
704 kg of Sand required for 1 cu.m of M-15 grade
concrete.
1320 kg of 20mm Aggregate is required for 1 cu.m
of M-15 grade concrete.
146 litres of water is required for 1 cu.m of M-15 grade concrete.
M-20 grade. concrete
8 bags of
cement required for 1 cu.m of M-20 grade. concrete.
693 kg of
Sand required for 1 cu.m of M-20 grade concrete.
1344 kg of
20mm Aggregate is required for 1 cu.m of M-20 grade concrete.
180 litres of water is required for 1 cu.m of M-20 grade concrete.
M-25 grade. concrete
11.3 bags of cement required for 1 cu.m of M-25
grade. concrete.
616 kg of Sand required for 1 cu.m of M-25 grade
concrete.
1155 kg of 20mm Aggregate is required for 1 cu.m
of M-25 grade concrete.
254 litres of water is required for 1 cu.m of M-25 grade concrete.
 |
| Concrete grades with all constituents |
Number of Cement bags, Sand and Aggregate
required for different Concrete Grade mixes in cft
 |
| Concrete Grade mixes in cft |
The initial concrete
grades are best used for:
M 10
Used for: Patio slabs,
pathways,Pcc and non-structural work.
Type: Domestic &
commercial use.
M 15
Used for: Pavement kerbs
and floor blinding.
Type: Domestic &
Commercial.
M 20
Used for: Domestic floors
and foundations (where the weight of structure will be lighter). Also good for
workshop bases, garages, driveways and internal floor slabs.
Type: Domestic.
M 25
Used for: Construction in
all areas. Multi-purpose concrete mix, usually used for foundations.
Type: Domestic &
Commercial.
Check calculations in M20 grade of concrete.
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