Civil Engineering - Concrete Technology - Discussion
Discussion Forum : Concrete Technology - Section 2 (Q.No. 11)
11.
Hardening of cement occurs at
Discussion:
74 comments Page 1 of 8.
Sohail Soomro said:
7 years ago
It is the cement that causes the strength gain/ hardening of concrete due to the heat of hydration process that is fast during first 28 days but if it is not rapid in early days it might be uniform though it is also available in options then why the answer is none of these?
Therefore the answer must be a rapid rate during the first few days and afterwards, it continues to increase at a decreased rate.
Therefore the answer must be a rapid rate during the first few days and afterwards, it continues to increase at a decreased rate.
Paul said:
9 years ago
@Sushan & @Bharath.
When we did compressive strength testing of cement the process is almost same (using standard sand as aggregate+cement +water) as concrete and the strength gain pattern of cement is also same as concrete.
So, A should be the answer.
When we did compressive strength testing of cement the process is almost same (using standard sand as aggregate+cement +water) as concrete and the strength gain pattern of cement is also same as concrete.
So, A should be the answer.
Sudip kandel said:
3 years ago
Here in this question, the hardening of cement is mentioned not the hardening of concrete.
If hardening of concrete is considered then option A would have been the correct answer but in the case of hardening of cement, option D is correct.
If hardening of concrete is considered then option A would have been the correct answer but in the case of hardening of cement, option D is correct.
(6)
Bonjamo said:
5 years ago
A is the correct answer for CONCRETE since the strength of concrete after one year compared to 28 days strength is 20 to 25% more.
D is the correct answer for CEMENT since cement final setting time is about 10 hours.
D is the correct answer for CEMENT since cement final setting time is about 10 hours.
Zahir said:
8 years ago
The correct answer is A because in first 7 days it gains 66% of strength after 28 days it is assumed to gain full strength but after 28 days also there will be an increase in strength gain at the lower rate.
DARSHAN H A said:
9 years ago
The correct answer is A because in first 7 days it gains 66% of strength after 28 days it is assumed to gain full strength but after 28 days also there will be an increase in strength gain at the lower rate.
Mopi said:
9 years ago
Mainly Due to Hydration of cement only concrete matrix is formed and also strength achievement. Then C2S is responsible for ultimate strength means, why the rate of hydration occurs for longer period.
Khattak said:
5 years ago
@All.
Cement does not hards itself at ordinary conditions unless water is mixed with it TOF form mortar or concrete by adding other ingredients, so option D must be the correct answer.
Cement does not hards itself at ordinary conditions unless water is mixed with it TOF form mortar or concrete by adding other ingredients, so option D must be the correct answer.
Hima said:
4 years ago
Hardness of cement occurs with in 30 minutes to 600 minutes (10 hours).
As Hardness of Cement or Concrete is due to from their Initial and final setting times.
As Hardness of Cement or Concrete is due to from their Initial and final setting times.
Hassan said:
1 decade ago
Why not option A?
When concrete 1st placed it quickly sets termed as initial setting after which it dries and increase hardening at a decreased rate.
When concrete 1st placed it quickly sets termed as initial setting after which it dries and increase hardening at a decreased rate.
Post your comments here:
Quick links
Quantitative Aptitude
Verbal (English)
Reasoning
Programming
Interview
Placement Papers