Which of the following statements regarding Portland Pozzolana Cement (PPC) is INCORRECT?
1
PPC is useful in marine and hydraulic structures.
2
Fly ash is a pozzolanic material used for the manufacture of PPC.
3
PPC produces more heat of hydration than ordinary Portland cement
4
The long-term strength of PPC beyond a couple of months is higher than that of ordinary Portland cement if enough moisture is available for continued pozzolanic action.