How do you calculate the mix ratio of concrete i.e. what is
the cement:sand:agrugate ratio in 20Mpa, 21Mpa, 22Mpa etc...
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Answer / mks
The mix design is done as per IS 10262, follow the
procedure for your results.
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As per thumb rule cement required per 1 cum of M20 concrete is 411Kg/cum(1.57/5.5=0.285cum of cement i.e 0.285*1440=411Kg).But as per PWD rate analysis cement required is 347Kg/cum.the difference is 64Kg.This kind of difference is coming every grade of concrete.Can you give perfect suggestion regarding this.
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