Consider the following oxides:
1. Al2O3
2. Cao
3. SiO2
Which one of the following is the correct sequence in increasing order off their percentage analysis for an
ordinary portland cement?
The approximate percentage of major oxides in Ordinary Portland Cement is:
• Al₂O₃ (Alumina): 3–8%
• SiO₂ (Silica): 17–25%
• CaO (Lime): 60–65%
Therefore, in increasing order of percentage:
Al₂O₃ < SiO₂ < CaOPreparing students for success in a changing World.
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