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How to find quantity of cement bags, sand, coarse aggregate, from 1m3 of concrete of m20 design?
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Answer Posted / banti kumar
The dry volume of concrete is 15.2 for 10m³ of concrete.
The ratio of M20 is 1:1½:3
Therefore 1+1½+3 =5.5
Now 15.2÷5.5=2.76 say 2.8cum
Sand =2.8×1½=4.8 cum
Coarse aggregate=2.8×3=8.4cum
No of cement bags =2.8÷0.035=80 bags(10m3)
Therefore for 1m3 80÷10= 8 bags.
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