**How many bags of cement in m15 grade of 1m3 of concrete**

**■ what is the ratio of m15 concrete**

**■ introduction :-**in this topic we know about how many bags of cement in m15 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. RCC concrete having used of Steel and PCC concrete is without Steel ,concrete is mixture of cement sand and aggregate in fixed proportion and **m15 is ordinary grade of concrete that is not used in RCC work it is only used in PCC work.**

**■ what is the ratio of m15 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 m15 grade of concrete.M Stand for mix and numerical figure is compressive strength of curing time of 28 days. **And mix ratio in m15 grade of concrete is 1:2:4** in which one part is cement 2 part is sand and 4 part is aggregate.

**How many bags of cement in m15 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 :2:4

Total proportion = 1+2+4=7

Part of cement = 1/7

Part of sand = 2/7

Part of aggregate = 4/7

**1)■ bags of cement in m15**

Weight = volume× density

Weight = 1/7×1.54 m3×1440 kg/m3

Weight = 316.8 kg

1 bags cement = 50 kg

bags of cement = 316.8/50 =6.336

bags of cement in m15 = 6.336

**2) volume of sand in cft**

1m3 = 35.32 cft

Volume =( 2/7) × 1.54×35.32

Sand volume = 15.54 cft

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**3) volume of aggregates in cft**

1m3 = 35.32 cft

Volume =( 4/7) × 1.54×35.32

Sand volume = 31 cft

So quantity of material in m15 grade of 1 cubic metre concrete is following

bags of cement in m15 = 6.336

Volume of sand = 15.54 cft

Volume of aggregates = 31 cft