What is clinker ?
Correct answer: C. roasted calcareous and argillaceous material
- A. roasted calcareous material
- B. roasted argillaceous material
- C. roasted calcareous and argillaceous material
- D. roasted gypsum
Explanation
Clinker forms when the calcareous material, mainly limestone, and argillaceous material, containing clay and silica, are heated together in the kiln. The resulting hot, hard nodules contain compounds formed from CaO, SiO2, Al2O3 and Fe2O3. Students may choose a or b by treating clinker as coming from only one raw material.
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