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Q: Which of the following, oxide composition limit of ordinary Portland cement is incorrect?
  • A. Fe₂O₃ = 6% - 10%
  • B. Al₂O₃ = 3% - 8%
  • C. SiO₂ = 17% - 25%
  • D. CaO = 60% - 67%
Correct Answer: Option A -
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Explanations:

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