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 6 of 6.

Aman said:   5 years ago
37 kg right answer.

5/100*9*(50)+30/100*1*(50).
22.5+15= 37.5 litre water required.

5 mean 5 per cent of aggregate+ 30 per cent of cement= wt of cement.
9 = 6+3 = aggregate ratio.
1= cement ratio.

Anne said:   5 years ago
Water required = (5% of aggregate + 30% of cement ) * w/c.
Ratio given = 1:3:6 ( c:s:a).
1 bag cement = 50kg.
Sand = 3*50 = 150kg (3 parts of sand).

Therefore,
Water required = (5/100*150) + (30/100*50) * 0.6.
= 13.5 = 14 kg.
(4)

Sudhansu said:   5 years ago
1:3:6 = 7.
1.52/7= 0.217 cm Cement.
1 cm Cement = 1440 kg cement.
0.217 cm Cement = 1440 x 0.217 = 312.48 kg.
For 312.48 kg Cement water required = 312.48 x 0.6 = 187.2 kg.
1 bag of Cement =50 kg So, 312.48 / 50 = 6.25 bags.
For1 bag, cement required = 187.2/6.25 = 30 kg (approx).

Shubham Angre said:   4 years ago
28% of water is required for the concrete mix and 1 bag of cement = 50 kg.
So, 50*28% = 14 kg.
(9)

Ramchandra chaulagain said:   4 years ago
We know, W/C=weight of water in kg/weight of cement in kg.
so, the weight of water = weight of cement * w/c.
= 50 * 0.6.
= 30 kg.
That's why Ans is 30kg.
(4)

Abdur Rehman said:   4 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.
(30)

Tanmoy Ghosh said:   3 years ago
Here, 0.6 * 50 = 30.
(9)


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