How many cement bags and sand is required for M20 grade of concrete?

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## Jitendra45

For calculating the quantity of cement, sand, aggregate, and water follow these steps:

For one cubic meter of M20 (1:1.5:3)

Wet volume of Concrete = 1 cum

Dry volume of Concrete = 1.54 cum (increased by 54% for dry volume)

Cement = 1.54/(1+1.5+3) × 28.8 = 8.064 say 8 bags. (1 cum = 28.8 bags)

Sand = 1.54/(1+1.5+3) × 1.5 = 0.42 cum or 14.83 cft.

Aggregate = 1.54/(1+1.5+3) × 3 = 0.84 cum or 29.66 cft.

Water Quantity

Assume water-cement ratio = 0.5

Water required = water-cement ratio × Cement quantity (kg)

= 0.5 × 400

= 200 litres.

## Vivek Patel

for 1 cubic meter, we calculate as follow

let’s take dry mixture of aggregate sand and cement required is 1.52 cubic meter.

M20 have an approximate proportion of cement sand and aggregate is 1:1.5:3

cement in bag= (1/5.5.)x1.52/0.035 =7.89 say=8 bagssand in kg = (1.5/5.5)x1.52 x 1650=684 kgaggregate in kg=(3/5.5) x 1.52 x 1700 =1410 kg