how to calculate 1:2:4 ratio concrete cement, sand, metal
and water please give me brief calculation

Answer Posted / mavani hitesh

for mixing of 1:2:4 proportion
1 is stand for cement, 2 stand for sand and 4 stand for aggregate.
for volume batching.standard pharma is used.which is of 35 liter.
for 1 bag proportion.
cement= 1 bag
sand= 2*35
= 70 liter
aggregate= 4*35
= 140 liter
in cum
1 cum = 1000 liter
70+140=210 liter
reduce 25% of 210 for wet mixed.
which comes 158 liter
1000 liter/158 = 6.36 bag of cement

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