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The clinkering reaction that forms alite is

  • A.the ferrite phase decomposing again during cooling
  • B.belite reacting with free lime in the presence of melt
  • C.limestone decomposing directly into alite in the kiln
  • D.gypsum reacting with the silica that is present

Answer: B

Belite forms first at lower temperature and then takes up further lime once the melt appears. This explains why free lime and belite are both left behind when burning is insufficient. The two faults appear together and have a single underlying cause.

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