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.
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Re: Cement Standard
That’s the problem with the use of terms like Ordinary. What was ordinary (as opposed to high alumina or super-sulphated, etc.) in England in the nineteenth century is not necessarily what is ordinary in China or India today.