NCC - National Cement Company Yemen

Characteristics and Properties of NCC Portland Pozzolana Cement:

Portland Pozzolana cement plays a very important role in making cement paste PPC plays a role in making cement paste, plastic and malleable (for doing internal and external finishes.
PPC reduces the heat generated from the first phase of water is added.
It reduces cement permeability in plain and enforced concrete.
It improves the plastic and bonding feature of cement grout (to be suitable for plastering).
It acts as a heat insulator (it reduces electric power consumption used for lighting and air conditioning).
It has the property of absorbing any noise and helps in reducing sound echoing, that is, it has an excellent acoustic property.
It increases fire resistance (due to that Pozzolana has silica and alumina, this type of cement tolerates high temperatures during fires; thus, we see that furnace chimneys are made of PPC.)
It has a high resistance sulfates, chlorides and acids.
It has a high resistance to interaction of alkalis with silicate.
It reduces porosity and permeability and increases the surface of the granules.
It reduces cement permeability in plain and enforced concrete.
It has high sulfate resistance (All construction works and buildings done along coastal areas or on on soil rich with dissolved sulfate).
It has an overtime resistance to weathering conditions (Actually, archaeological monuments and historical sites are built of rocks of a volcanic origin. A living testimony is the presence of old Roman palaces).
It reduces the high temperature generated by high C3S content.