Civil Engineering - Concrete Technology - Discussion

Discussion Forum : Concrete Technology - Section 5 (Q.No. 29)
29.
For a concrete mix 1:3:6 and water cement ratio 0.6 both by weight, the quantity of water required per bag, is
10 kg
12 kg
14 kg
16 kg
20 kg
Answer: Option
Explanation:
No answer description is available. Let's discuss.
Discussion:
57 comments Page 1 of 6.

Kavita said:   1 decade ago
Please solve this problem. How this answer comes?

Prahumac said:   1 decade ago
Can anybody please give a proper explanation for this one?
(1)

Suman said:   1 decade ago
0.6 means 60 liter water per 100 kg cement as 1 bag of cement contains 50 kg of cement.

So 60/2 = 30 liter water required per bag of cement.

P.s said:   1 decade ago
See 30%of cement means 0.3*50 kg = 15 kg.

5% of fine aggregate 0.05*150 = 7.5 kg.

0.6*(15+7.5) = 13.5 kg+14 kg.

Robert said:   10 years ago
How did you rear get them I don't get it?

Nitu bharti said:   10 years ago
Water required = (5% of aggregate + 30% of cement)*w/c.

Cement per bag = 50 kg.
Aggregate = 50*3 = 150 kg.

5% of aggregate = 7.5 kg.
30% of cement= 15 kg.

Water required = (15+7.5)*0.6 = 13.5 kg which may be approximately 14 kg.

Kamran said:   10 years ago
Why we take aggregate 150 kg?

3 times of cement? Explain please?

S. kumar said:   10 years ago
3 times of cement is fine sand, aggregate is 6 times actually. How you can take aggregate 3 times? Explain please?

Abhi said:   10 years ago
Its wrong answer is 30 kg.

How can we take water for aggregate if nothing is mentioned?

NIKUNJ said:   9 years ago
Water required per bag means:

Cement bag = 50 kg.

W/c ratio = 0.6.

Water = 50 x 0.6.

Hence water = 30 kg.

If we assume water absorption in calculation then water require more than 30 kg.


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