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|PORTLAND POZZOLANA CEMENT (PPC)|
PPC (Portland Pozzolana cement) is ordinary Portland cement intimately blended or inter-ground with pozzolanic materials such as fly ash, calcined clay, rice husk ash etc.Amrit Cement PPC (IS 1489-1991) is made by intergrinding high strength clinker with specially processed flyash. This imparts a greater degree of fineness to Fly-ash based PPC cement, improved workability properties while mixing, and makes concrete more corrosion resistant, thermal cracking and impermeable.
Advantage of PPC Cement:-
PPC gains compressive strength with age.
PPC generates reduced heat of hydration and that too at a low rate.
PPC is highly resistant to sulphates.
As the fly ash is finer and low density, the bulk volume of 50 kg bag is slightly more than OPC. Therefore PPC gives more volume of mortar than OPC.
The long term strength of PPC is higher than OPC if enough moisture is available for continued pozzolanic action
PPC gives better workability during preparation of concrete.
PPC gains high tensile strength. PPC resistant to expansion.