Dear All,
I want to know a brief history behind the use of word " Ordinary " in many cement standard.
If we compare indian standard for OPC cements like IS:269, IS : 8112 and IS : 12269with chinese standards like GB175 : 1999 , then we find that what chinese sell as OPC is indian PPC.
Moreover EN standards never use word "ordinary" before portland cement, but are equivalent to indian OPC.
Pl. explain
Regards,
Gulam Dastgir
