What Is PPC Cement | Uses of Portland Pozzolana Cement | Types of Pozzolana Materials | Properties of Portland Pozzolana Cement | Advantages & Disadvantages of Portland Pozzolana Cement
Crushing of Raw Material: Limestone and clay are the primary ingredients used in the manufacture of Portland cement. After digging, these raw material stones are dumped by trucks and sent to crushers to reduce the particle size. They are then piled up in a pre-homogenization yard waiting to be recycled.
Raw Material Grinding: The fine particle size raw materials are fed to the raw mill in the desired proportion for further reduction of the particle size, then deposited in silos, and the process of mixing and homogenization of the material is completed.
Calcination of Clinker: Cement raw food is sent to a cement rotary oven to be calcined at a high temperature. After many chemical reactions, some spherical grey particles, which we call clinker, are produced. These hot clinkers can be cooled to a regular temperature in the cement cooler.
Cement Grinding: Upon freezing, the clinker is combined in an adequate amount with pozzolanic materials as well as gypsum before being sent to the cement mill for actual grinding. Cement material is normally processed in cement silos and packaged as well as processed in the factory.
PPC cement has to be cured for a lot longer, as well as the curing temperature does have a major impact on the development of its strength. Whenever the temperature is low, the hardening process is sluggish. Although steam curing or humid heat treatment is being used, the hardening is intensified so that the cement isn't really ideal for winter building.
The initial strength of the PPC cement is smaller, however the final strength is high. That's also owing to the effective silica in the pozzolanic substance reacting with the calcium hydroxide in order to create a significant volume of hydrated calcium silicate.
The water demand for PPC cement is strong since the mixture content is porous and the fine particles are fine. The water demand of normal consistency differs with the form and quantity of the mixture.
Portland pozzolana cement has a reasonably long fixed period, the initial set time takes at least half an hour, and the actual set time requires at most 10 hours.
The drying contraction of Portland pozzolana cement does not reach 0.15 percent.
The fineness of pozzolana cement must not be much less than 300 m2/kg.
PPC cement has a strong compressive strength and can cross 13 MPa in 3 days, 22 MPa in 7 days and 33 MPa in 28 days.
The hydration and hydration levels of PPC cement are low, which is due to the variety and quantity of mixed materials.
PPC cement has a high tolerance to sulfate in acidic water and carbonic acid environments.
Portland pozzolana cement is ideal for underground, water, or wet concrete works, in particular for projects that require impermeability, resistance to freshwater, and sulfate corrosion, including such hydraulic systems, marine structures, dam building, offshore construction, waste disposal, respectively.
Owing to its weak resistance to frost, Portland pozzolana cement isn't really ideal for low-temperature buildings and for the climate prone to freezing periods and alternating drying and wetting.
Such as ordinary Portland cement, PPC cement too is suitable for general engineering including mass-concrete engineering. Owing to its wide dry shrinkage, it is not ideal for dry areas.
CCP cement has low early strength, and therefore it is best suited for general engineering that would not need high early strength.
PPC cement is essential as a strong surface finishes for decoration including artistic structures.
It is an eco-friendly cement because the ingredients used in the manufacturing are manufactured from renewable recycled waste.
It is very fine cement, therefore very good when used for plastering.
Pozzolano comprises of silica material that makes it inexpensive and thus reduces the cost of cement making it economical to use.
Pozzolana cement has a very high resistance to sulfate attacks and is thus used during hydraulic structures, coastal structures, building along the seashore, dam construction, etc.
PPC used during pre-stressed and post-stressed concrete members.
It eliminates carbon monoxide emissions from concrete, allowing it environmentally safe.
Since the pozzolano materials are quite fine, the holes between the reinforcement and the aggregate can be filled, decreasing the shrinkage, minimizing the formation of honeycombs, and reducing leakage, which in turn increases the strength and toughness of the concrete.