How to Calculate the Total Bags of Cement and Tones of Sand for a Particular Volume of Concrete

As an Engineer on site, you must know the amount of cement and sand require for a particular volume of concrete.

Knowing this will prevent you from running loss. I will explain to you how to calculate the amount of cement and sand require for any volume of concrete.

The calculations below is all about 1:2:4 mix ratio of Concrete

CALCULATING FOR CEMENT 

TOTAL RATIO = 1+2+4
= 7
Since:
Cement = 1
Sand = 2
Granite = 4

We are dealing with cement, we have 1/7 = 0.143

For 1m³ of cement = 1m³ * 0.143
= 0.143m³

Addition of waste and shrinkage 54% = (54/100 * 0.143) + 0.143
= 0.0772m³ + 0.143m³
= 0.22m³

Density =  Mass/Volume

1440 = 50/Volume

Volume = 0.03472m³

1 Bag of Cement = 0.03472m³

Y Bags of Cement = 1m³

Y = 1/0.03472

Y = 28.8 bags of Cement

1m³ of cement = 28.8 bags
0.22m³ of cement = X bags

X = 6.3 bags of cement

Now for 1:2:4 mix ratio, the number of cement require to mix 1m³ of concrete
= 6.3 bags.

Assuming you are to calculate the amount of cement require for 0.55m³ of concrete

1m³ of Concrete  = 6.3 bags of cement

0.55m³ of concrete = X bags of cement

X = 3.47 bags of cement.

This means 3.47 bags of cement will mix 0.55m³ of concrete using 1 : 2 : 4 mix Ratio

CALCULATING FOR SAND

TOTAL RATIO = 1+2+4 = 7
Since we are dealing with sand, we have 2/7 = 0.285
For 1m³ of sand = 1m³ * 0.285
= 0.285m³

Addition of 35% bulking = 0.099m³
Addition of 10% waste = 0.03m³
= 0.285 + 0.099 + 0.03
= 0.414m³

0.65m³ of sand = 1 ton of sand
0.414m³ of sand = x tons of sand

X = 0.637 tons.

Now for 1:2:4 mix ratio, the number of sand require to mix 1m³ of concrete
= 0.637 tons.

Assuming you are to calculate the amount of sand require for 0.55m³ of concrete

1m³ of concrete = 0.637 tons of sand

0.55m³ of concrete = X tons of sand

X = 0.35 tons of Sand

This means 0.35 tons of sand will mix 0.55m³ of concrete using 1 : 2 : 4 mix Ratio

Check out How to Calculate The Total Tons of Granite for a Volume of Concrete

This is a must know calculation for Engineer, Quantity Surveyor and Site Manager on site to avoid wastage of Materials

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Calculating Total Bags of Cement and Tones of Sand Require in a Particular Volume of Concrete