Pick up the correct statement from the following:-A-For thin structures subjected to wetting and drying, the water cement ratio should be 0.45B-For mass concrete structures subjected to wetting and drying, the water ratio should be 0.55C-For thin structures which remain continuously under water, the water cement ratio by weight should be 0.55D-For massive concrete structures which remain continuously under water, the water cement ratio by weight should be 0.65E-All the above.-E-All the above.

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APTITUDE CRACK · Accepted Answer

E All the above. As we see in the IS Code 10262, it,s clear that the W/C ratio is fixed based on the experience (d/mix done earlier if any for that area) and trail mix for the particular Gr of concrete. It also depends on the workability (i.e, the reqd. Slump). W/C ratio normally increases for the higher Gr. of Concrete. The Selection of Gr.of concrete basically depends on the factor like (a) Types of structure (b) Location of structure (i.e, exposure condition) )to be constructed (c) Strength required for the Concrete. So, confirming the W/C ratio without considering the above factors is not practically acceptable.

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