Answer / suneendra

nominal mixes are those proportioned by the volume of the main ingrediants ( cement:sand:coarse aggregate ) Design mix:- Disign mixes on the other hand are specified as a grade the producer of the concrete has to achieve usually in terms of compressive srength

Answer / rajesh.d.v.s.p.

in nominal mix we didn't give any factor of safety.
but in design mix we give the factor of safety

there for design mix Fck= fck+t.s

s= stranded deviation
t = number of testing samples

Answer / guest

up to m20 grade u

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