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

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 bags

sand in kg = (1.5/5.5)x1.52 x 1650 =684 kg

aggregate in kg =(3/5.5) x 1.52 x 1700 =1410 kg

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