Civil Engineering - Concrete Technology - Discussion

Discussion Forum : Concrete Technology - Section 4 (Q.No. 34)
34.
If 50 kg of fine aggregates and 100 kg of coarse agregates are mixed in a concrete whose water cement ratio is 0.6, the weight of water required for harsh mix, is
8 kg
10 kg
12 kg
14 kg
15 kg.
Answer: Option
Explanation:
No answer description is available. Let's discuss.
Discussion:
41 comments Page 1 of 5.

Sudip kandel said:   3 years ago
We have the relation of:

0.3 * cement + 0.1 * sand + 0.01 * aggregate = w/c * cement.
Here,
0.3 * c + 0.1 * 50 +100 * 0.1 = 0.6 * c.
c = 20 kg.
w/c = 0.6.
So, water = 0.6 * 20 = 12 kg.
(24)

B.Singh said:   3 years ago
W/C * P = 0.3P + 0.1F.A +.01C.A.
0.6 * P = 0.3P + 0.1(50) + 0.01(100),
0.6P - 0.3P = 5 + 1,
P = 6/0.3.
P = 20 => Where P= Cement.

Now;
W/C = 0.6,
W = C * 0.6,
W = 20 * 0.6,
W = 12Kg.
(15)

Aryan said:   2 years ago
@All.

W/c * cement = 0.3 * cement + 0.1 * fine aggregate + 0.01 * coarse aggregate.

0.6 * C = 0.3 * C + 0.1 * 50 + 0.01 * 100.
C = 20KG.
W/C * Cement = wt of water.
= 0.6 * 20 = 12 kg.
(11)

Ejaz Ahmad said:   5 years ago
Wt. Of water = (5% of Coarse aggregate + 30% of fine aggregate) * water cement ratio.

Therefore,
Wt. Of water = {5 * 100/100 +30 * 50/100} * 0.6,
Wt. Of water= 12kg.
(10)

Anil said:   3 years ago
I can't understand please help me. What is 30% & how it come?
(8)

Er vikash saini said:   4 years ago
Here 50 kg weight of cement:

M 25 ratio 1:1:2.
(5% weight of aggregate + 30 weight of cement)w/c ratio.
(4)

Mir Imroz said:   4 years ago
In harsh mix weight of water =. 30% wt of fine aggregate + .05% wt of coarse aggregate) water-cement ratio.
(3)

Sameer Khan said:   4 years ago
Where does this formula comes from?

W/C *P = 0.3P + 0.1F.A +.01C.A

How do you justify it? Please explain me.
(3)

Muhtasim said:   4 years ago
What will be formula for rich mix?
(1)

ASHISH SHARMA said:   5 years ago
W/C *P = 0.3P + 0.1F.A +.01C.A.
0.6*P =0.3P + 0.1(50) + 0.01(100),
0.6P - 0.3P = 5 + 1,
P = 6/0.3,
P = 20 => Where P= Cement.

Now;
W/C = 0.6,
W = C * 0.6,
W = 20 * 0.6,
W = 12Kg.
(1)


Post your comments here:

Your comments will be displayed after verification.