a concrete mix 1 2 4 by volume with water cement ratio as .6
by weight if moisture content in F.A is 6% with 20% BULKING
AND IN C.A 1.5% by volume. find quantities of different
materials required for one bag of cement
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Answer Posted / Parul Trivedi
First, we need to convert the volume ratio to a weight ratio since the water-cement ratio is given in weight.nn1 m3 of concrete mix with a ratio of 1:2:4 by volume has a weight ratio of approximately 0.33:0.67:1.33 (aggregate to cement).nnSince the water-cement ratio is .6, the weight of cement required for 1 m3 of concrete mix would be (0.6 / (1 - 0.6)) * 1 = 0.8.nnThe total weight of cement in 1 m3 of concrete mix with 20% bulking would be 0.8 * (1 + 0.2) = 1.16.nnSince the moisture content in F.A is 6%, the actual weight of water needed for 1 m3 of concrete mix would be approximately 0.94 m3 * 0.06 = 0.0564 m3 or 56.4 kg (rounded).nnSince the moisture content in C.A is 1.5%, the actual weight of cement required for 1 m3 of concrete mix would be approximately 1.16 - 0.0564 = 1.1036.nnTo find the quantities for one bag of cement, you would need to know the weight of a bag.
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