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Portland Puzzolana Cement is a mixture of Ordinary Portland (75 to 90%) and a Puzzolana(10 to 25%). This is finer than ordinary portland cement. Sometimes PPC concrete gains strength at a slower rate than OPC concrete.

Properties
Specific surface sqcm/gms (minimum)	3000
Setting time, minutes (Vicat): Initial (Maximum)	30 600
Soundness, Le Chatelier(max.)mm.	10
Slag Content(%)	--
Puzzolana Content	10-25
Compressive str. Mpa Min.at 7 days 28 days	22 31
MgO (%) (max.)	6
SO3 (%) (max.)	3
Insoluble residue(%) (max.)	Related to puzzolana content
Loss on ignition(%) (max.)	5