Blast Furnace Slag Portland Cement

Blast Furnace Slag Portland Cement

1. Definition:

• A type of blended cement containing ground granulated blast furnace slag (GGBFS) as a supplementary cementitious material.

2. Composition:

• Combines Portland cement clinker, calcium sulfate, and GGBFS.
• GGBFS typically replaces 30-50% of the Portland cement in the blend.

3. Properties:

• Enhanced durability due to the dense microstructure.
• Improved resistance to chemical attacks, such as sulfate and chloride attacks.
• Lower heat of hydration prevents cracking in large concrete pours.

4. Environmental Benefits:

• Reduces carbon footprint with lower CO2 emissions.
• Utilizes industrial by-products (GGBFS), promoting recycling and sustainability.

5. Applications:

• Suitable for high-performance concrete structures, such as bridges, dams, and marine installations.
• Ideal for use in conditions where resistance to aggressive environments is required.

6. Performance:

• Slower initial strength gain compared to ordinary Portland cement.
• Long-term strength and performance often surpass those of standard cement.

7. Standards and Specifications:

• Governed by various standards like ASTM C595 and C989 for blending ratios and performance requirements.

These summarized points provide a comprehensive understanding of Blast Furnace Slag Portland Cement, covering its composition, properties, benefits, and applications.