Civil Engineering - Concrete Technology - Discussion

Discussion Forum : Concrete Technology - Section 1 (Q.No. 2)
2.
If 1500 g of water is required to have a cement paste 1875 g of normal consistency, the percentage of water is,
20%
25%
30%
35%
40%
Answer: Option
Explanation:
No answer description is available. Let's discuss.
Discussion:
95 comments Page 8 of 10.

ALAM said:   7 years ago
The weight of water = 1500 gm.
The weight of cement paste = 1875 gm.
Weight of cement =(1875-1500)= 375 gm.
% of water = (wt.of cement/wt.of water) * 100.
= (375/1500) * 100.
= 25%.

Er. Amol Bagul said:   7 years ago
1875-1500/1500 = 375 ÷ 1500 = 0.25 * 100 = 25%.

Sami Ullah said:   7 years ago
@All.

If 1500g of cement is requured to have a cement paste 1875g of normal consistancy, the %age of water is;

Then it will be like,
Cement = 1500g,
Paste = 1875g,
Then water = 1875-1500= 375g.

And w/c ratio = (wtr/ cement) * 100 = (375/ 1500) * 100 = 25%.

Upender said:   7 years ago
Percentage of water = weight of cement/weight of water * 100 =1875-1500/1500 * 100= 25%.

Faysal said:   7 years ago
1875/1500 = 1.25.
1.25-1 * 100 =25%.

Farid Khan said:   6 years ago
If 1500 g of water is required to have a cement paste 1875 g of normal consistency, the percentage of water is,

According to the question.
Cement paste=1875.
Water=1500.
Cement =1875-1500=375.

Now if we want to know the percentage of cement then=(wt of cement/wt of water) *100
=375/1500*100=25%.

And if want to know the percentage of water then =wt of water/wt of cement *100
=1500/375*100 = 400%.
(1)

Sudesh said:   6 years ago
@Farid.

You're right It's 400%.
Hence For Possible For Cement Paste.
Question Should be 1500gm Cement for 25%.

Rajendra Saindane said:   6 years ago
I also agree with your concept @P. Rajayogan.

Ewunetu Molla said:   6 years ago
Cement paste= water +cement = 1875g,
Amount of water =1500g,
%Water = (1875-1500)/1500 = 25%.

JITENDRA KUMAR said:   6 years ago
Actually in the question, in place of 'water', it should have been 'cement'. In that case:
Percentage of water will be = (wt of water/wt of cement)*100.
= (1875-1500)*100.
= 25%


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