Civil Engineering - Concrete Technology - Discussion

High workability is required when the structural member is thin and heavily reinforced.

Why not option C?

I think option C is the correct answers.

I too think it is option C.

@All.

It's D only. The given answer is correct.

Yeah, D is the correct answer. Because in thin structure there may compaction is done by inserting the compaction needle from the surface but which can't be done in the case of the very thick structure.

Yes, the correct answer is 'C'. I agree.

Yes, D answer is correct, because if I can use vibration needle easily, then workability will be increased.

In thin and heavily reinforced structures needle vibratore cannot be used hence workable concrete is required.

I think option C is correct : When a section is narrow, complicated, several narrow corners, inaccessible parts; a highly workable concrete is desirable to obtain full compaction through a reasonable amount of effort. When the section is crowded with steel reinforcement and spacing of bars is relatively small, compaction can be difficult and hence highly workable concrete is recommended in such cases. If there are no limitations of the critical section or heavy reinforcement, we can get a wide range of workability for concrete casting.