Answer / karan sardana

this is because you are using design mix instaed of nominal.. the qty of cement in 1 cum of concrete is 411kg, but in design mix the cement consumption is considerably reduced, thats why you are getting this difference always.....

Answer / pranav panchal

This difference comes due to the mix design of the concrete

At every place the mix design depends upon the material & material source so if PWD is considering the cement consumption that means their mix design shows this cement consumption

cement quantity in 1 M3 pcc

2 Answers  

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How do we get this formula Ast=(0.5Fck/Fy) into(1-(in sqrt(1-((4.6Mu)/Fck.bd^2))into bd Fck=grade of cement i.e M25, M20 Fy=grade of steel i.e.Fe415,Fe250 Mu=moment b=width d=depth 

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