Civil Engineering - Concrete Technology - Discussion

Discussion Forum : Concrete Technology - Section 2 (Q.No. 17)
17.
Water required per bag of cement, is
7 kg
14 kg
21 kg
28 kg
35 kg
Answer: Option
Explanation:
No answer description is available. Let's discuss.
Discussion:
45 comments Page 1 of 5.

Pavan@iiit nuzvid said:   6 years ago
Simple,

Vol of cement bag of 50 Kg = 0.035 m3.
And, per 1 m3 we need 1000Kg of water.
So, Water required = 1000*0.035 = 35 Kg.
Since there is no mention about w/c ratio.
(15)

Sham Chavan said:   6 years ago
1m^3 = 1000kg or 1000lit.
1m^3 = density of cement / weight of one bag.
1m^3 = 1440/50=28.8 bags.
28.8bags = 1000kg.
1bag = 1000/28.8 = 34.7~ 35kg or 35 lit.
So Answer is correct.
(9)

Srikumar said:   5 years ago
Minimum water cement ratio is 0.45.
with that 50kg(1bag) x 0.45= 22.5 is the correct answer.
(6)

Adam said:   4 years ago
50kg bag required 20 litre of water.
(4)

Pamu said:   1 year ago
It's 22 - 25 litre.
(1)

Rajesh thakur said:   9 years ago
@All.

This Question had been asked SSC(JE) and in that key the answer is 28.

Please tell me, which is the correct answer.

Ritesh said:   9 years ago
Answer is correct but it should be 35 liter not 35 kg.

BABLU JE said:   9 years ago
M10:- 34 ltr
M15:- 32
M20:- 30
M25:- 28

Bapi khan said:   8 years ago
The unit is wrong. It should be 35 lit water is required for 1 bag cement where as 22.5 kg water is required for 1 bag cement.
1 m^3 = 1000 lit.
Then find 0.0347 m^3= ? lit.
Ans will be 34.7 lit = 35 lit.

Naren said:   8 years ago
In general:-

Grade minimum w/c water required(lit/bag)
M10 -------> 0.6. ------- 34 (30+4 lit extra)
M15 -------> 0.6 ------- 32 (30+2 lit extra)
M20 -------> 0.55 ------- 30 (28+2.")
M25 -------> 0.5 ------- 27 (25+2.".)
M30/35 -------> 0.45 ------- 25 (23+2.".)
M30 -------> 0.4 ------- 22 (20+2. ".)
Minmum -------> 0.38 ------- 21 (19+2. ".)


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