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Why we do design mix of concrete when there is nominal
method using the IS-Code available ?
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Answer Posted / sailesh kaw
Design mix is carried out for the optimization of concrete,
to increase its durabilty and to decrese its permeability.
WC ratios is also reduced.
Design mix is based on the specific weights of the material
where as 1:2:4, 1:3:6 etc are volumetric based design
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