Civil Engineering - Concrete Technology - Discussion

Only A is correct.

Friends see the options clearly.

Obviously the answer is C3S But in options it is not given (he gives only tricalcium).

C3s increase with lime content.

Answer is D.

Specific surface and burning at high temperature is next to c3s.

A should be the answer.

Answer A is correct because finer cement has reached early strength.

Yes, I too think, All the options are correct.

A is the correct option.

The correct answer will be A.

I think option A is correct.

The Correct answer is A.

During the initial period of hardening, the gain in strength of C2S is small and is about 15% of that of C3S. After 28 days the hydration of C3S comes practically to an end and the hydration of C2S only really begins at that time. Hence when a high strength concrete is required within a short period of time, the cement is made with the high content of C3S. On the other hand if a high strength concrete is required at a later stage as in the case of hydraulic engineering constructions the cement is made with the high content of C2S.
So option D is the right one.

Option [A]. Finer grinding. The fineness of cement helps to improve some properties of the cement but can not impart any extra property to it and plays a role in early setting but early strength is far different.

Option [B]. Burning at high temperature...the main motives of burning are
1) to drive-off the carbon dioxide with combustion gases
2) the raw materials get fused together...
(and nothing to do with the initial strength of cement)

Option [C]. increased lime cement. Being a civil engineer, one must know this ''the lime in excess makes the cement unsound and causes the cement to expand and disintegrate and if lime is in deficiency the strength of cement is decreased and causes the cement to set quickly.

[D]. higher content of tricalcium is the correct option.