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 PozzoIlona 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?1
1, 2 and 3
2
2, 3 and 4
3
3, 4 and 5
4
2, 3 and 5