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Which one of the following is NOT present in cement?

Options

  1. A2CaO SiO₂
  2. B3CaO SiO₂
  3. C4CaO SiO₂
  4. D3CaO Al₂O₃

Correct answer

C. 4CaO SiO₂

Step-by-step solution

Portland cement is a complex mixture of silicates and aluminates of calcium. The main constituents of Portland cement are: Dicalcium silicate ( 2CaO SiO₂ ) Tricalcium silicate ( 3CaO SiO₂ ) Tricalcium aluminate ( 3CaO Al₂O₃ ) Tetracalcium aluminoferrite ( 4CaO Al₂O₃ Fe₂O₃ ) Tetracalcium silicate ( 4CaO SiO₂ ) is not a constituent of cement. Answer: 4CaO SiO₂

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