Question:
What is the % of \(CaO\) in Portland Cement?
What is the % of \(CaO\) in Portland Cement?
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Portland cement contains about \(60-65\%\) lime \((CaO)\), which is its major oxide constituent.
Updated On: May 7, 2026
- \(40-45\)
- \(70-75\)
- \(50-55\)
- \(60-65\)
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The Correct Option is D
Solution and Explanation
Concept:
Portland cement mainly contains lime \((CaO)\), silica \((SiO_2)\), alumina \((Al_2O_3)\), and iron oxide \((Fe_2O_3)\).
Step 1: Lime is the major oxide present in Portland cement.
Step 2: Lime combines with silica, alumina, and iron oxide to form clinker phases.
Step 3: The usual percentage of \(CaO\) in ordinary Portland cement is approximately: \[ 60-65\% \]
Step 4: Therefore, the correct range is: \[ \boxed{60-65} \]
Step 1: Lime is the major oxide present in Portland cement.
Step 2: Lime combines with silica, alumina, and iron oxide to form clinker phases.
Step 3: The usual percentage of \(CaO\) in ordinary Portland cement is approximately: \[ 60-65\% \]
Step 4: Therefore, the correct range is: \[ \boxed{60-65} \]
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