Question

Consider the following statements regarding 'setting of cement'.
1. Low-heat cement sets faster than OPC.
2. Final setting time decides the strength of cement.
3. Initial setting time of Portland Pozzolana is 30 minutes.
4. Air-induced setting is observed when stored under damp conditions.
5. Addition of gypsum retards the setting time.
Which of the above statements are correct?

• A. 1, 2 and 3
• B. 2, 3 and 4
• C. 3, 4 and 5
• D. 2, 3 and 5

Answer 1

The correct option is C 3, 4 and 5

Low heat cement sets slower than OPC. Setting time has no relation with strength of cement. So, option (c) is correct.