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 1 of 3.

Muhammad Tabish said:   3 years ago
For 50 kg bag 35L of water is required. Without w/c ratio one can't find the solution.

Am I right? Please explain me.
(2)

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.

Nayab kaleem said:   5 years ago
For normal consistency, minimum w/c ratio is 0.45 that's why w = 0.45 * 50 = 22.5.
(5)

Dipbesu said:   5 years ago
Minimum W/C ratio 0.38.
So required water= 50 x 0.38 = 19lt.
(3)

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

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

Mahim said:   5 years ago
W/c ratio should be between .35 to .45.


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