What is difference between M20 and M30 concrete?
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What is difference between M20 and M30 concrete?
There are two types of concrete mixes, nominal mix and design mix. Nominal mixes for grades of concrete such as M15, M20, M25 are generally used for small scale construction. Large structures have high strength requirements, thus they go for higher grades of concrete such as M30 and above.
What is the mix proportion of M20?
1 : 1.5 : 3
Different types of concrete grades and their uses
| Concrete Grade | Mix Ratio (cement : sand : aggregates) | Compressive Strength |
|---|---|---|
| M7.5 | 1 : 4 : 8 | 7.5 MPa |
| M10 | 1 : 3 : 6 | 10 MPa |
| M15 | 1 : 2 : 4 | 15 MPa |
| M20 | 1 : 1.5 : 3 | 20 MPa |
What is the mix proportion of M30 concrete?
Now we calculate the quantity of materials for a trail mix. cement = 360 x 0.045 = 16.2 kg. water = 140 x 0.045 = 6.3 kg. 20 mm = 645 x 0.045 = 29.03 kg….Trial Mix:1, (For M30 Grade Concrete Mix Design)
| Age of In Days | Nos of Cube Required |
|---|---|
| 28 Day | 6 |
What is the proportion of concrete mix?
Typically, a mix is about 10 to 15 percent cement, 60 to 75 percent aggregate and 15 to 20 percent water. Entrained air in many concrete mixes may also take up another 5 to 8 percent.
How do you calculate mixed proportions?
The prescribed Nominal Concrete Mix Ratio of M20 grade concrete is 1:1.5:3.
- Cement = 1 Part.
- Sand = 1.5 Part.
- Aggregate = 3 Part.
- Total dry volume of ingredients required = 1.57 cu.m.
What is M30 design mix?
Mix proportioning for a concrete of M30 grade is given in A·I to A-ll. s = standard deviation. From Table I of IS 10262:2009, Standard Deviation, s = 5 N/mm2. Therefore, target strength = 30 + 1.65 x 5 = 38.25 N/mm2.