# How calculate volume of different concrete materials

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Estimating of concrete is based on the following factors :- Density of Cement = 1440 kg/m^{3}

Sand Density = 1450-1500 kg/m^{3}

Density of Aggregate = 1450-1550 kg/m^{3}

How many KG in 1 bag of cement = 50 kg

Cement quantity in litres in 1 bag of cement = 34.7 litres

1 Bag of cement in cubic metres = 0.0347 cubic meter

How many CFT (Cubic Feet) = 1.226 CFT

Numbers of Bags in 1 cubic metre cement = 28.8 Bags

Specific gravity of cement = 3.15

Grade of cement = 33, 43, 53

Where 33, 43, 53 denote compressive strength of cement in N/mm2

M-20 = 1 : 1.5 : 3 = 5.5, (Cement : Sand : Aggregate)

Some of Mix is – 5.5

Where, M = Mix

20 = Characteristic Compressive strength

Consider volume of concrete = 1m3

Dry Volume of Concrete = 1 x 1.54 = 1.54 m3 (For Dry Volume Multiply By 1.54)

Calculation for Cement, Sand and Aggregate quality in 1 cubic meter concrete:

• CALCULATION FOR CEMENT QUANTITY

Cement= (1/5.5) x 1.54 = 0.28 m^{3} ∴ 1 is a part of cement, 5.5 is sum of ratio

Density of Cement is 1440/m^{3}

= 0.28 x 1440 = 403.2 kg

Weight of each bag of cement is 50 kg

For Numbers of Bags = 403.2/50 = 8 Bags

One bag of cement = 1.226 CFT

To convert in CFT (Cubic Feet) = 8 x 1.225 = 9.8 Cubic Feet

### Also Read: How to estimate different types of concrete work

• MEASUREMENT FOR SAND QUANTITY

Assume volume of concrete = 1m^{3}

Dry Volume of Concrete = 1 x 1.54 = 1.54 m^{3}

Sand= (1.5/5.5) x 1.54 = 0.42 m^{3} ∴ 1.5 is a part of Sand, 5.5 is sum of ratio

Density of Sand is 1450/m^{3}

For KG = 0.42 x 1450 = 609 kg

It is known 1m^{3} = 35.31 CFT

To convert in Cubic Feet = 0.42 x 35.31 = 14.83 Cubic Feet

MEASUREMENT FOR AGGREGATE QUANTITY

Assume volume of concrete = 1m^{3}

Dry Volume of Concrete = 1 x 1.54 = 1.54 m^{3}

Aggregate = (3/5.5) x 1.54 = 0.84 m^{3} ∴ 3 is a part of cement, 5.5 is sum of ratio

Density of Aggregate is 1500/m3

To convert in KG = 0.84 x 1500 = 1260 kg

It is known that 1 m^{3} = 35.31 CFT

To convert in CFT = 0.84 x 35.31 = 29.66 Cubic Feet

Measurement for Cement, Sand quality in mortar for Plaster:

Area of brick wall for plaster = 3m x 3m =9m^{2}

Plaster Thickness = 12mm (Outer-20mm, Inner 12mm)

Volume of mortar = 9m^{2} 0.012m = 0.108m^{3}

Ratio for Plaster Taken is = 1 : 6

Sum of ratio is = 7

Calculation for Cement Volume

Dry Volume of Mortar = 0.108 1.35 = 0.1458 m^{3}

Cement= (1/7) = 0.0208 m^{3}

Density of Cement is 1440/m^{3}

= 0 1440 = 29.99 kg

We know each bag of cement is 50 kg

= (29.99/50) = 0.599 Bags

Calculation for Sand Volume

Sand = (6/7) x 0.1458 = 0.124m^{3}

Density of Sand is 1450/m^{3}

= 0 1450 = 181.2 kg

Now we find how many CFT (Cubic feet) Required

As we know that 1m^{3} = 35.31 CFT

= 0.124*35.31

= 4.37 CFT (Cubic Feet)

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