Cement is classified based on its composition, strength, and application. The quarry crusher is a key machine in cement production, used to break down large rocks into smaller aggregates. Below is an overview of cement classification and the role of quarry crushers:
1. Cement Classification
Cement types are categorized based on their chemical composition and performance characteristics:
# A. Based on Composition
1. Ordinary Portland Cement (OPC)
– Types: OPC 33, OPC 43, OPC 53 (numbers indicate compressive strength in MPa at 28 days).
– Characteristics: High early strength, widely used in general construction.
2. Portland Pozzolana Cement (PPC)
– Composition: OPC clinker + pozzolanic materials (fly ash/volcanic ash).
– Characteristics: Better workability, lower heat of hydration, higher resistance to chemical attacks.
3. Portland Slag Cement (PSC)
– Composition: OPC clinker + granulated blast furnace slag.
– Characteristics: Low heat evolution, high sulfate resistance, used in marine structures.
4. Rapid Hardening Cement
– Gains strength quickly (within 3 days).
– Used in precast concrete and repair works.
5. Low Heat Cement
– Reduced heat generation during curing.
– Suitable for mass concrete structures like dams.
6. Sulfate-Resistant Cement
– Resists sulfate attack in soil/water.
– Used in foundations and sewage systems.
7. White Cement
– Made from low-iron raw materials for aesthetic applications.
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# B. Based on Strength & Setting Time
– Type I: General-purpose cement (OPC).
– Type II: Moderate sulfate resistance (PPC/PSC).
– Type III: High early strength (Rapid hardening).
– Type IV: Low heat of hydration (Mass concrete).
– Type V: High sulfate resistance.
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2. Quarry Crusher in Cement Production
# A. Role of Quarry Crusher
– Crushes raw limestone, shale, or other aggregates into smaller pieces for further processing in cement plants.
– Reduces rock size to facilitate grinding in raw mills.
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# B. Types of Quarry Crushers
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