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Calcined Clay 50/80

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Calcined clay is a natural clay material that has undergone high-temperature treatment, typically between 900°C and 1000°C, to enhance its physical and chemical properties. The 50/80 designation indicates the particle size distribution, with particles passing through a 50-mesh sieve (0.297 mm opening) and being retained on an 80-mesh sieve (0.177 mm opening).

Specifications

The 50/80 designation typically refers to the particle size distribution of the calcined clay. Here, the numbers represent the mesh sizes through which the material has passed:

  • 50 Mesh: Particles that can pass through a 50-mesh sieve (0.297 mm opening)

  • 30 Mesh: Particles that are retained on a 80-mesh sieve (0.177 mm opening)

Physical and Chemical Properties

​Physical Properties

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  1. Particle Size: 0.177 mm - 0.297 mm

  2. Bulk Density: Approximately 50-60 lb/ft³ (800-960 kg/m³)

  3. Color: Light brown

  4. Shape: Angular particles

  5. Hardness: High hardness due to calcination, enhancing abrasion resistance

Chemical Composition

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  1. Silicon Dioxide (SiO2): 50-60%

  2. Aluminum Oxide (Al2O3): 20-30%

  3. Iron Oxide (Fe2O3): 2-5%

  4. Calcium Oxide (CaO): 0.5-2%

  5. Magnesium Oxide (MgO): 0.5-2%

  6. Potassium Oxide (K2O): 1-2%

  7. Sodium Oxide (Na2O): 0.1-1%

  8. Titanium Dioxide (TiO2): 1-2%

Applications

  • Oil and Gas Industry

  • Construction

  • Ceramics

  • Refractory Products:

  • Agriculture

  • Sports Turf and Landscaping

Conclusion

Calcined clay 50/80 is a versatile material with a wide range of applications across various industries due to its enhanced physical and chemical properties post-calcination. Its intermediate particle size, combined with its ability to withstand high temperatures, improved hardness, and porosity, makes it particularly valuable in demanding applications such as hydraulic fracturing and construction materials. Proper handling and storage are essential to maintain its quality and performance.

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