Civil Engineering - Building Materials - Discussion
Discussion Forum : Building Materials - Section 6 (Q.No. 16)
16.
Good quality cement contains higher percentage of
Discussion:
17 comments Page 1 of 2.
Mr.X said:
5 years ago
Correct Answer is- C2S.
During Reaction C3S & C2S:- C-S-H & Ca (OH) 2 formed, CSH is the good properties of conc. Makes up 50-60% vol. Solid.
And that reactions seen C3S produces lesser quantity C-S-H and more quantity Ca (OH) 2 and that is not desirable product in concrete mass it is soluble in water makes conc. Porous, and also the quality density of C-S-H formed out C3S is slightly inferior to that form by C2S.
Ref: M S SHETTY.
During Reaction C3S & C2S:- C-S-H & Ca (OH) 2 formed, CSH is the good properties of conc. Makes up 50-60% vol. Solid.
And that reactions seen C3S produces lesser quantity C-S-H and more quantity Ca (OH) 2 and that is not desirable product in concrete mass it is soluble in water makes conc. Porous, and also the quality density of C-S-H formed out C3S is slightly inferior to that form by C2S.
Ref: M S SHETTY.
Uday said:
6 years ago
The good quality of cement contains;
50% of tricalcium silicate- for rapid strength and quick setting of cement.
30% of dicalcium silicate- hardens slowly and responsible for long term strength.
10% of tricalcium aluminate-quick action with water.
10% of tetra calcium Aluminoferrate.
5% of Gypsum.
50% of tricalcium silicate- for rapid strength and quick setting of cement.
30% of dicalcium silicate- hardens slowly and responsible for long term strength.
10% of tricalcium aluminate-quick action with water.
10% of tetra calcium Aluminoferrate.
5% of Gypsum.
Aaron said:
6 years ago
It should be tricalcium silicate.
Option A is correct because the question was about an overall higher percentage. So as calculated,
1) Tricalcium silicate is 30-50%.
2) Di-calcium silicate is 20-45%.
3) Tri-calcium aluminate is 8-12%.
4) Tetra calcium alumino ferrite is 6-10%.
Option A is correct because the question was about an overall higher percentage. So as calculated,
1) Tricalcium silicate is 30-50%.
2) Di-calcium silicate is 20-45%.
3) Tri-calcium aluminate is 8-12%.
4) Tetra calcium alumino ferrite is 6-10%.
Nayan Maitra said:
8 years ago
Tricalcium silicate is the right answer.
Because it gives the early strength if there is no early strength in concrete structure then what is the profit?
No one wt for 2-3 years for gaining complete strength by di calcium silicate. So right answer is option A.
Because it gives the early strength if there is no early strength in concrete structure then what is the profit?
No one wt for 2-3 years for gaining complete strength by di calcium silicate. So right answer is option A.
Ajay verma said:
9 years ago
I think B is the correct answer because in good quality cement 32% of Di-calcium silicate, 4% of Tricalcium silicate, 10. 5% of Tri-calcium aluminate & 9% of Tetra calcium alumino ferrite.
Istiaque said:
9 years ago
No, it's correct.
The typical compound compositions of this type are:
55% (C3S), 19% (C2S), 10% (C3A), 7% (C4AF), 2.8% MgO, 2.9% (SO3), 1.0% ignition loss, and 1.0% free CaO.
The typical compound compositions of this type are:
55% (C3S), 19% (C2S), 10% (C3A), 7% (C4AF), 2.8% MgO, 2.9% (SO3), 1.0% ignition loss, and 1.0% free CaO.
Narendra Nagar said:
6 years ago
I think the given answer is correct.
C3S 45-65.
C2S 15-35.
C4AF 10-18.
C3A 4-14.
Ref: RANGWAALA BOOK.
C3S 45-65.
C2S 15-35.
C4AF 10-18.
C3A 4-14.
Ref: RANGWAALA BOOK.
(1)
Kaushal gopalvansi said:
6 years ago
The answer is correct A.
Because of an excess of C3A early strength and save from sulfur attack.
Because of an excess of C3A early strength and save from sulfur attack.
Abhishek singh said:
9 years ago
According to my view, B is correct because Di-calcium silicate provide ultimate strength.
Md.Masum Chowdhury said:
5 years ago
C3S - Early strength.
C2S - Ultimate strength.
So the given answer is correct.
C2S - Ultimate strength.
So the given answer is correct.
(1)
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