Blended cement – advantages, types and applications- Blended cement are produced by inter-grinding Portland cement clinker together at temperatures of about 1400–1500°C.)

1. Blended Cement – Advantages, Types
and Applications

2. Blended cement
• Blended cement are produced by inter-grinding
Portland cement clinker together at temperatures
of about 1400–1500°C.)
• The dominant materials used for blended cement
are BFS, fly ash and silica fume.
• ASTM C595 provides prescriptive-based
specifications for specifically blended cement
that consist of portland-cement clinker ground or
blended with suitable proportions of granulated
blast-furnace slag or natural or artificial
pozzolans.

3. Advantages of blended cement
• Improves the workability of fresh concrete, making it easier to place and
finish. Using less water also reduces shrinkage and permeability.
• Contribute to the long-term strength gain of concrete. Silica fumes can
hasten strength development and reduce curing time.
• Lower heat of hydration and less risk of thermal cracking
• Reduces heat of hydration and thermal stresses.
• Reduced overall concrete cost:
• The mineral supplements used to replace portland cement require
significantly less processing and typically lower the cost of the concrete.

4. Benefits of Blended Cement

5. Type IS (X), Portland-Slag Cement
• Higher level of compressive strengths in concrete
when compared to OPC
• Higher flexural strength to concrete, which
enhances its structural stiffness and minimises
load deflections
• Reduces the ingression of harmful substances
such as chlorides and sulphates due to low
permeability
• Environment-friendly due to reduced GHG
emissions

6. Type IP (X), Portland-Pozzolan Cement
• High compressive strength
• The application includes masonry mortars and
plastering
• Protects concrete against alkali-aggregate
reaction
• Makes the concrete more impermeable and
denser

7. Type IL (X), Portland-Limestone Cement
• Portland-limestone cement (PLC) is a blended
cement with a higher limestone content, which
results in a product that works the same,
measures the same, and performs the same, but
with a reduction in the carbon footprint of 10%
on average.
• Increases durability
• Excellent placing and finishing properties
• Shrinkage and heat of hydration improved
• Enhanced setting and strength performance

8. Type IT, Ternary Blended Cement
• High strength
• Corrosion resistance
• ASR resistance
• Elimination of thermal cracking
• Low permeability
• Sulfate resistance

9. Applications
• Major engineering projects
• Domestic construction
• Precast concrete
• Stabilisation including pavement recycling for
road construction
• Mining applications
• Specialist formulations such as adhesives,
renders, mortars and grouts

10. Conclusion
• The growing use of supplementary
cementitious material blended portland
cement is due in part to numerous
performance factors, including low
permeability, resistance to chlorides and
sulfates, mitigation of alkali-silica reaction,
greater strength, lower temperatures for mass
concrete, and improved workability.

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cement-advantages-types-and-applications/