RAVIG TRADING(OPC) PRIVATE LIMITED

ORDINARY PORTLAND CEMENT(OPC)

Ordinary portland cement is the most widely used type of cement, which is suitable for all general concrete construction. It is the most commonly produced and used type of cement around the world with annual global production of around 3.8 million cubic meters per year. This cement is suitable for all kinds of concrete construction.

How is Ordinary Portland Cement Made?

Source Raw Materials

Raw materials like limestone and clay are obtained from blasting rock quarries with explosives. The raw material is then transported to grinding units.

Grind Limestone and Clay

Various types of grinders grind the limestone and clay into finer particles to achieve a homogenous blend.

Heat The Mixture

The homogenous blend of raw materials is heated in kiln at high temperatures. The manufacturer may add additional ingredients per the type of cement. The heated mixture forms clinker.

Grind Clinker

Clinker is intimately ground with gypsum to form Ordinary Portland Cement.

Advantages of Ordinary Portland Cement

It has great resistance to cracking and shrinkage but has less resistance to chemical attacks.
Initial setting time of OPC is faster than PPC so it is recommended in projects where props are to be removed early.
Curing period of OPC is less than PPC and curing cost reduces. Hence recommended where curing cost prohibitive.

PROPERTIES OF ORDINARY PORTLAND CEMENT

Fineness: it indicates the particle size of cement which impacts the surface area and, in turn, the heat of hydration.
Soundness: soundness of cement is the volume change when its set and hardened.
Setting time: setting time is the taken by the cement and water paste to turn from its plastic state to its hardened stage.
Compressive strength: compressive strength refers to the capacity of concrete to withstand load without crackingor deflecting.

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