Civil Engineering - Concrete Technology - Discussion

Discussion Forum : Concrete Technology - Section 2 (Q.No. 11)
11.
Hardening of cement occurs at
rapid rate during the first few days and afterwards it continues to increase at a decreased rate
slow rate during the first few days and afterwards it continues to increase at a rapid rate
uniform rate throughout its age
none of these.
Answer: Option
Explanation:
No answer description is available. Let's discuss.
Discussion:
74 comments Page 2 of 8.

Lechi Naga said:   2 years ago
Hardening of cement occurs due to a chemical reaction between cement and water rapidly in the first few days.

So, Option A is correct.
(1)

Nit said:   10 years ago
Strength of cement increases initially but after cement strength goes on decreasing. Approximately 50 % after 24 months period.

Hhh said:   4 months ago
Hardening and setting time are different things. though cement may set in 10hrs but hardening continues and A is correct

Ram said:   7 years ago
Concrete gets 100 % hard in first 10 hours and it's totally different from strength of concrete so option D is correct.

Manzoor said:   7 years ago
Given answer is correct because it talks of cement not concrete and hardening is something different than strength.

Khalid said:   10 years ago
I think answer should be A because I read in many literature heat of hydration in 3 days is occurred about 50%.

Bharath E said:   9 years ago
Yes, answer D is correct, it is clearly mentioned in question as Cement and not mentioned concrete anywhere.

Rima said:   1 decade ago
Answer must be A.

Concrete gets harder after initial setting time and its continuous also after 28 days.

Harshdeep said:   9 years ago
It is cement not concrete. So it setting hardening depends upon many factor and one is type of cement.
(1)

Hemendra maurya said:   7 years ago
Answer A is correct because cement hydrates rapidly but it gains ultimate strength at decreased rate.


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