Civil Engineering - Concrete Technology - Discussion

Discussion Forum : Concrete Technology - Section 4 (Q.No. 30)
30.
Setting time of cement increases by adding
gypsum
hydrogen peroxide
calcium chloride
sodium oxide
none of these.
Answer: Option
Explanation:
No answer description is available. Let's discuss.
Discussion:
37 comments Page 3 of 4.

Arman Malik said:   8 years ago
Gypsum increase setting time of cement.

Rajesh said:   8 years ago
I agree retarder increase setting time to delay takes place. Where as in accelerator decrease setting time to react fastly.

Karan said:   8 years ago
Which material is used for decreasing the setting time of cement?

Dinesh said:   8 years ago
Gypsum is 200% correct answer it increases the setting time because it is a retarder. And calcium chloride decreases the setting time so that conc can be sets early as it is an accelerator.

Ritesh said:   8 years ago
No, @Ssuman.

Because gypsum is a retarder so it prolongs the setting time and calcium chloride is an accelerator and it shortens the setting time.

Sujit kumar said:   8 years ago
A is right. I agree.

Akhil said:   8 years ago
Time increase i.e retarder gypsum.

The right answer is A.

Suman said:   9 years ago
Calcium chloride is 100% right answer gypsum is decreasing for setting time of cement.

Rahul said:   9 years ago
Yes, friends gypsum is the right answer. I agree.

Gopal said:   9 years ago
It should be C.


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