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Calculate the volume of cement in cubic metre required for making 10 cubic metre of M20 grade Plain Cement Concrete work, assuming the ratio of dry concrete mix to wet concrete mix as 1.52.
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- 1.7 to 1.9
- 2.7 to 2.9
- 2.1 to 2.5
- None of these
Correct Option: B
Composition of M20 Grade Concrete (C : S : A) = 1 : 1.5 : 3. (Total 5.5)
i.e. 5.5-unit volume of concrete contains 1 -unit volume of cement.
Thus, 1 cu.m. volume of concrete contains 0.19 cu.m. volume of cement.
Thus, 10 cu.m. volume of concrete contains 1.9 cu.m. volume of cement.
For wet concrete mix, it requires 1.52 times more volume as given by the ratio of dry concrete mix: wet concrete mix.
Thus, for making 10 cu.m. of wet concrete mix, 1.52 × 1.9 = 2.88 cu.m. of cement.
