Physics · Building Materials
Which of the following oxide composition limits of ordinary Portland cement is incorrect?
- 1CaO = 60% - 67%
- 2SiO 2 = 17% - 25%
- 3Al 2 O 3 = 3% - 8%
- 4Fe 2 O 3 = 6% - 10%✓
Correct answer
Fe 2 O 3 = 6% - 10%
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