Grades of Cement with Proportion (Combine Ratio)



We use various grades of cement for various areas of the building.

We're able to say the quality of concrete may be the only factor we do care great deal while concreting.

In this article, we will explain that at length.

In fact, what do we suggest by grade of cement.?

Concrete grades are denoted by M10, M20, M30 in accordance with their compressive strength.

The “Mâ€?denotes Mix design of concrete accompanied by the compressive strength number in N/mm2

“Mixâ€?may be the respective ingredient proportions which are Cement: Sand: Aggregate Or Cement: Fine Aggregate: Coarse Aggregate.

we already discussed the mix design here.

If we mention M10 concrete, this means that the concrete has 10 N/mm2 characteristic compressive strength at 28 days.

Note

The Minimum grade of concrete for Plain Cement Concrete (PCC) is M15

The Minimum grade of concrete for Reinforced Cement Concrete (RCC) is M20

Concrete Grade and Mix Ratio Table

According to IS 456:2000, the grades significantly less than M20 shouldn't be found in RCC works

GroupConcrete GradeMix RatioCharacteristic Compressive Strength (N/mm2)
Ordinary ConcreteM51 : 5 : 105 N/mm2
M7.51 : 4 : 87.5 N/mm2
M101 : 3 : 610 N/mm2
M151 : 2 : 415 N/mm2
M201 : 1.5 : 320 N/mm2
Standard ConcreteM251 : 1 : 225 N/mm2
M30Design Mix30 N/mm2
M35Design Mix35 N/mm2
M40Design Mix40 N/mm2
M45Design Mix45 N/mm2
M50Design Mix50 N/mm2
High Strength ConcreteM55Design Mix 55 N/mm2
M60Design Mix 60 N/mm2
M65Design Mix 65 N/mm2
M70Design Mix 70 N/mm2

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