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Types of Cement - OPC

What is Ordinary Portland Cement?


Ordinary Portland cement is the most commonly used type of Cement.

Constituents of Ordinary Portland Cement

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The main raw materials needed in manufacturing Ordinary Portland Cement are:

  1. Argillaceous or silicates of alumina in the form of clays and shales.
  2. Calcareous or calcium carbonate, in the form of limestone, chalk, and marl is a mixture of clay and calcium carbonate.

The main chemical constituents of Ordinary Portland cement are:

Lime (CaO)

60 to 67%

Silica (SiO2)

17 to 25%

Alumina (Al2O3)

3 to 8%

Iron oxide (Fe2O3)

0.5 to 6%

Magnesia (MgO)

0.1 to 4%

Sulphur trioxide (SO3)

1 to 3%

Soda and/or Potash (Na2O+K2O)

0.5 to 1.3%














Lucky Cement offers one of the highest quality Ordinary Portland Cement (OPC) that is used most commonly and is used in all general constructions, especially in big prestigious projects where Ordinary Portland cement is required to meet strict quality requirements. OPC is also used in concrete mortars and grouts and Ordinary Portland Cement is compatible/consumable with admixture/ retarders, etc.

OPC is popular in the construction industry because the workability is easy and brands like Lucky Cement maintain their technical standards of quality at a very high level and with high strength at all ages. Lucky Cement’s OPC cement satisfies EN 196 / 197 – 1, SABS, BIS, SLSI & PSS – 232 ~ 1983 (R).


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