Question 1

What are the key characteristics of National OPC?

Accepted Answer

National OPC is known for its high compressive strength, excellent workability, and consistent quality. It typically has a quick setting time and superior durability, making it suitable for a wide range of construction applications.

Question 2

Can this cement be used in marine or sulphate-rich environments?

Accepted Answer

No, this cement is not recommended for marine or high-sulphate soils. Specialized cements are better suited for such conditions.

Question 3

How does Grade 53 OPC differ from other grades?

Accepted Answer

Grade 53 OPC offers higher early compressive strength compared to Grades 33 and 43, making it ideal for structures requiring quick setting and high durability.

Question 4

Is this cement resistant to corrosion?

Accepted Answer

Yes, National OPC provides resistance against corrosion, making it suitable for long-lasting construction projects.

Question 5

What are the main constituents of Ordinary Portland Cement?

Accepted Answer

The primary components include lime, silica, alumina, and iron oxide. These materials contribute to its high strength and binding properties.

Question 6

What are the technical properties of this cement?

Accepted Answer

The key properties of this cement include a Specific Gravity of 3.15, Fineness of 3400 cm²/g, Initial Setting Time of 65 minutes, Final Setting Time of 275 minutes, and a Compressive Strength of ≥53 MPa at 28 days.

Question 7

What are the key applications of this cement?

Accepted Answer

It is widely used for constructing high-rise buildings, roads, bridges, industrial complexes, and other heavy structures due to its superior strength and durability.

Question 8

What is the packaging type and size for this cement?

Accepted Answer

The cement is packaged in 50 kg HDPE sack bags, ensuring durability during transportation and storage.

Question 9

What is the grade of National (OPC) Ordinary Portland Cement?

Accepted Answer

This cement is classified as Grade 53, which signifies high compressive strength, making it suitable for heavy-duty construction like high-rise buildings and bridges.

Question 10

What is the shelf life of National OPC?

Accepted Answer

The shelf life of National OPC is typically up to six months if stored properly in a dry environment. It is crucial to keep the cement away from moisture to maintain its quality and effectiveness in construction projects.

Question 11

What are the mixing requirements for National OPC?

Accepted Answer

When using National OPC, it can be mixed with aggregates like sand and gravel to create concrete or with other materials for specific applications such as grouting. Proper mixing ratios are essential to achieve desired strength and workability.

Question 12

What applications is National OPC suitable for?

Accepted Answer

National OPC is versatile and can be used in various construction applications, including residential buildings, commercial structures, infrastructure projects, and precast concrete products. Its durability makes it ideal for both indoor and outdoor use.

Question 13

How is National OPC packaged?

Accepted Answer

National OPC is typically available in 50 kg bags, making it convenient for transportation and handling on construction sites. This packaging size is standard in the industry for easy use.

Question 14

What are the standard compliance certifications for National OPC?

Accepted Answer

National OPC complies with international standards such as ASTM C150 and EN 197-1. These certifications ensure that the cement meets rigorous quality and performance requirements.

Question 15

What is the strength class of National OPC?

Accepted Answer

National OPC is classified as 42.5 R Strength Class, indicating that it achieves a minimum compressive strength of 42.5 MPa after 28 days of curing. This makes it suitable for both general and high-strength concrete applications.

National 50Kg Ordinary Portland Cement

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