**How many bags of cement in m20 grade of 1m3 of concrete**

**■ what is the ratio of m20 concrete**

**■ introduction** :-in this topic we know about how many bags of cement in m20 grade of 1m3 of concrete. we know that concrete is generally two types **RCC that is reinforced cement concrete and PCC** which is plain cement concrete. in RCC concrete there is a used of Steel and PCC concrete is plain concrete without Steel ,concrete is mixture of cement sand and aggregate in fixed proportion and **m20 is standard grade of concrete that is used in both RCC & PCC work**

**■ what is the ratio of m20 concrete**

There are different types of grade of concrete like** M 7.5 ,M10, M15, M20, M 25** and so on. But in this topic we have to study about m20 grade of concrete.**M Stand for mix and numerical figure 20 is compressive strength of curing time of 28 days. And mix ratio in m20 grade of concrete is (1:1.5:3)** in which one part is cement 1.5 part is sand and 3 part is aggregate.

**How many bags of cement in m20 grade of 1m3 of concrete**

Given volume of concrete = 1m3

Wet volume = 1m3

Dry volume = wet volume×1.54

For calculation of dry volume we multiply 1.54 into wet volume

Dry volume = 1m3×1.54 =1.54 m3

Density of cement = 1440 kg/m3

Mix ratio = 1 : 1.5 :3

Total proportion = 1+1.5+3=5.5

Part of cement = 1/5.5

Part of sand = 1.5/5.5

Part of aggregate = 3/5.5

**1)■ bags of cement in m20**

Weight = volume× density

Weight = 1/5.5×1.54 m3×1440 kg/m3

Weight = 403.2 kg

1 bags cement = 50 kg

bags of cement = 403.2/50 =8.064

bags of cement in m20 = 8.064

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**2) volume of sand in cft**

1m3 = 35.32 cft

Volume =( 1.5/5.5) × 1.54×35.32

Sand volume = 14.83 cft

**3) volume of aggregates in cft**

1m3 = 35.32 cft

Volume =( 3/5.5) × 1.54×35.32

Sand volume = 29.67 cft

So quantity of material in m20 grade of 1 cubic metre concrete is following

bags of cement in m20 = 8.064

Volume of sand = 14.83 cft

Volume of aggregates = 29.67 cft