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Cement

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coals

General Specification

1 Chemical Test    
  Total Loss on Ignition (%) Max. 5 1.2
  Insoluble Residue (& by mass) Max. 4 0.96
  Total Sulphur content as sulphuric anhydride (SO3), by mass Max. 3 1.96
  Mangesia (% by mass) Max. 10 3.54
  Sulphide sulphur (S) Max. 1.5 0.032
  Chlorides (% by mass) Max. 0.1 0.03
2 Physical Test    
  Fineness - Blaine (m2/kg) Min. 225 352
3 Setting Time (Minutes)  
  Initial Min. 30 110
  Final   600 175
4 Soundness    
  Le-Chatelie Expansion (in mm) Max. 10 1
  Autoclve Expansion (%) Max. 0.80% 0.06
5 Compressive Strength (MPa)  
  72± 1hr.(3 days) Min. 16 26
  168± 2 hrs. (7 days) Min. 22 37
  672± 4 hrs. (28 days) Min. 33 55

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