Portland Cement (PC)

INTRODUCING CROWN PORTLAND CEMENT

As per specification of BDS EN 197-1:2003, CEM-1, 52.5 N Crown Portland Cement is an Ordinary Cement prepared by mixing clinker 95-100% and gypsum 0-5%. This cement is also called Ordinary Portland Cement (OPC). Portland cement is the Cement obtained by intimately mixing together calcarious and argillaceous materials, burning them at clinkering temperature up to about 1450 degree celcious and grinding the resulting clinker (calcined product) at required fineness and finally mixed with gypsum to obtain cement. This cement is a finely ground mixture of calcium aluminates and silicates capable of setting and hardening by chemical reaction with water. It is a binding material, which is used in engineering constructions.

PROPERTIES

FINENESS

Crown Cement is tested for fineness by Blaine’s air permeability method.

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Crown Cement is tested for fineness by Blaine’s air permeability method. The specific surface of cement is 300-380 m2/kg.

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SOUNDNESS

Crown Cement is tested for soundness by the Le-Chatelier method and autoclave test.

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Crown Cement is tested for soundness by the Le-Chatelier method and autoclave test. The unareated cement shall have an expansion of less than 2.00 mm (Le-Chatelier method) & 0.08% (Autoclave Method) respectively.

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SETTING TIME

The setting time of cement is tested by Vicat apparatus method. Initial setting time is not

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The setting time of cement is tested by Vicat apparatus method. Initial setting time is not less than 45 minutes. Final setting time is not more than 375 minutes.

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COMPRESSIVE STRENGTH

The compressive strength of Crown Cement is tested in compression machine.

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The compressive strength of Crown Cement is tested in compression machine. In 2 days it is ≥ 20 MPa. In 28 days it is ≥ 52.5 MPa.

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CHEMICAL

Ratio of percentage of lime to percentages of silica, alumina and iron oxide when calculated the LSF becomes 0.90-0.94.

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Ratio of percentage of lime to percentages of silica, alumina and iron oxide when calculated the LSF becomes 0.90-0.94. Insoluble residue (by mass) 0.75% max. Total Chloride Content 0.10% max.

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QUALITY CONTROL

We ensure consistent quality control at every stage of production. Our plant is well supported

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We ensure consistent quality control at every stage of production. Our plant is well supported by a powerful in-house modern laboratory with the latest state-of-the-art equipment for quality control and continuous improvement in the products. In addition to the well equipped and furnished chemical and physical laboratory, we have highly qualified foreign trained chemists and technicians with long experience in the field of cement who are absolutely dedicated to their work.

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LAB TEST

Raw materials are tested in this lab before they are imported and sample of cement are also tested each

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Raw materials are tested in this lab before they are imported and sample of cement are also tested each and every hour during production. For quality assurance cement is tested on various parameters. For this, the chemists of M.I. Cement Factory Ltd. conduct the compressive strength test making concrete/mortal cubes of different test age-3 days, 7 days and 28 days, as per ASTM C-150, and 2 days & 28 days as per EN (European Standard) at its laboratory. Therefore we can deliver the highest quality cement to our customers.

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TECHNICAL SPECIFICATIONS

CEM-I, 52.5 N
Composition: Clinker 95-100%, Gypsum 0-5%

Benefits of Crown PC:
  • Can gain high early strength
  • Ensures durability
  • Resists cracking
  • Makes construction faster
  • Effective in producing high strength concrete
  • Used in construction of tall buildings or high-rise buildings & housing developments, Industrial buildings, factory buildings, and all type of construction works
  • Exclusively used in bridge, culvert, flyover, runway, pre-stressed concrete, pre-stressed prefabricated applications, tunnel mold systems & in the construction of mass housing
  • Frequently used in reinforced concrete elements & other prefabricated productions, particularly for pretension prefabricated applications
  • Mostly used in concrete classes of high compressive strength required applications
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