Civil Engineering - Building Materials - Discussion

Discussion Forum : Building Materials - Section 7 (Q.No. 31)
31.
For a 50 kg cement bag water required, is
16.5 litres
18.5 litres
20.5 litres
22.5 litres
25 litres.
Answer: Option
Explanation:
No answer description is available. Let's discuss.
Discussion:
28 comments Page 2 of 3.

Mutt said:   1 decade ago
if the water-cement ratio is specified as 0.45, the quantity of mixing water required per 50-kg bag of cement is 0.45 - 50 = 22.5 lt or kg.

Chandan Grover said:   4 years ago
For thin structures subjected to wetting and drying, the water-cement ratio should be 0.45.
For mass concrete structures subjected to wetting and drying, the water ratio should be 0.55.
For thin structures which remain continuously underwater, the water-cement ratio by weight should be 0.55.
For massive concrete structures which remain continuously underwater, the water-cement ratio by weight should be 0.65.

James said:   4 years ago
Minimum water cement ratio for workable concrete is 04.

So, we may say 0.4*50 = 20 liters. I think the answer should be 20.5.

MJM said:   4 years ago
35 litres is correct for 50kg cement.

Shafi said:   5 years ago
But the min w/c ratio is 0.4 and max w/c is 0.8 how we can consider 0.45?

They must have to specify the w/c ratio. Please explain.

Rohit said:   9 years ago
Why not - 0.45 X 0.50 = 22.5?

Arun said:   9 years ago
19 litres of water is enough to hydrate one bag of cement.

Soma bharath said:   5 years ago
Explian how come .45?

Deepak Yadav said:   5 years ago
Why w/c=0.45 taken? Please explain.

Baloch said:   9 years ago
W/c,=.45.
W = .45 * 50,
W = 22.5.


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