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,
Discussion:
95 comments Page 2 of 10.
Medhat Abdulaziz said:
9 years ago
Calculate the percentage of water (P) by weight of dry cement required to prepare cement paste of standard consistency by the following a formula, and express it in the first place of decimal.
Cement consistency 1.
P = (W/C)*100
Where,
W = Quantity of water added.
C = Quantity of cement used.
Cement consistency 1.
P = (W/C)*100
Where,
W = Quantity of water added.
C = Quantity of cement used.
Deepak raj joshi said:
3 months ago
The question might mean:
If 1500 g of cement is required to have a cement paste 1875 g of normal consistency, the percentage of water is
So now:
Cement = 1500 g,
Cement paste = 1875 g,
Therefore, water = 1875 - 1500 = 375 g.
water% = water/cement * 100% = 375/1500 *100% =25% ans.
If 1500 g of cement is required to have a cement paste 1875 g of normal consistency, the percentage of water is
So now:
Cement = 1500 g,
Cement paste = 1875 g,
Therefore, water = 1875 - 1500 = 375 g.
water% = water/cement * 100% = 375/1500 *100% =25% ans.
(2)
Yogesh Daharwal said:
7 years ago
I agree @Rajayogan.
If the weight of cement is only 375 gms and the water is 1500 gms/ml, try mixing it to make a paste, practically it won't form a paste but it will become a solution of cement and water. But 1500gms of cement and 375 gms of water is possible to make a paste.
If the weight of cement is only 375 gms and the water is 1500 gms/ml, try mixing it to make a paste, practically it won't form a paste but it will become a solution of cement and water. But 1500gms of cement and 375 gms of water is possible to make a paste.
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%.
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%.
Jack said:
9 years ago
% of water is not equal to (wt of water/wt of cement) x 100.
% of water = (wt of water/wt of cement paste) x 100.
= 1500/1875 x 100,
= 80%.
And hence the cement content must be 20%.
% of cement = (1875-1500)/1875 x 100 = 20%.
% of water = (wt of water/wt of cement paste) x 100.
= 1500/1875 x 100,
= 80%.
And hence the cement content must be 20%.
% of cement = (1875-1500)/1875 x 100 = 20%.
Bangada Mangisto Livino said:
1 decade ago
Given: Mass of water 1500g, Mass of paste 1875g and Mass of cement is given by,
1875g - 1500g = 375g.
%Mass of water = (Mass of cement/Mass of water).100%.
= (375/1500).100%.
= (0.25).100%.
= 25% Ans. required.
1875g - 1500g = 375g.
%Mass of water = (Mass of cement/Mass of water).100%.
= (375/1500).100%.
= (0.25).100%.
= 25% Ans. required.
Denzil said:
9 years ago
Wt. of cement = 1875 - 1500 = 375.
Water/cement ratio (or ratio of water per dry cement) = 1500/375 = 4.0.
%water = 400% -------> this is the answer.
Whoever using this kind of mix, and will say the resulting paste is of normal consistency.
Water/cement ratio (or ratio of water per dry cement) = 1500/375 = 4.0.
%water = 400% -------> this is the answer.
Whoever using this kind of mix, and will say the resulting paste is of normal consistency.
DARSHAN H A said:
10 years ago
Normal consistency is the ratio of w/c, hence in the question weight of cement is 1500 and weight of water is 1875-1500 = 375.
The question it self is wrong. By understanding the concept we can calculate consistency = 375/1500 x 100 = 25%.
The question it self is wrong. By understanding the concept we can calculate consistency = 375/1500 x 100 = 25%.
Mann said:
10 years ago
As we know the formula for water content = wt. of water/wt. solid.
Similarly here, % of water = (wt. of water/wt. of cement) x 100.
So, the data given I question is wrong, wt. of water should be 375 g, and wt of cement paste is 1875 g.
Similarly here, % of water = (wt. of water/wt. of cement) x 100.
So, the data given I question is wrong, wt. of water should be 375 g, and wt of cement paste is 1875 g.
Usha rani said:
1 decade ago
@Malavika.
As normal consistency test is conducted by mixing water and cement. The value 1875 is for both cement and water. When we subtract water value i.e. 1500g from whole 1875 (cement water paste) we get the weight of the cement.
As normal consistency test is conducted by mixing water and cement. The value 1875 is for both cement and water. When we subtract water value i.e. 1500g from whole 1875 (cement water paste) we get the weight of the cement.
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