Pick - out the statement which is NOT the advantage of Portland pozzolana cement?
1
The rate of development of strength is initially slightly quicker than OPC
2
In PPC, costly clinker is replaced by cheaper pozzolanic material - hence economical
3
It generates reduced heat of hydration and that too at a lower rate
4
PPC consumes calcium hydroxide and does not produce calcium hydroxide as much as that of OPC