Question:

The average composition of portland cement is

Updated On: Jul 7, 2022
  • $CaO : 40 - 50\%$, $SiO_2 : 30 - 40\%$ , $Al_2O_3$, $Fe_2O_3 : 10 - 20\%$
  • $CaO : 50 - 60\%$, $SiO_2 : 20 - 25\%$, $Al_2O_3 : 5 - 10\%$, $MgO : 2 - 3\%$, $Fe_2O_3 : 1 - 2\%$ and $SO_3 : 1 - 2\%$
  • $SiO_2 : 40 - 50\%$, $CaO : 30 - 40\%$, $Al_2O_3 : 10 - 20\%$
  • $CaO : 50\%$, $SiO_2 : 50\%$
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The Correct Option is B

Solution and Explanation

Port land cement consists of raw materials mainly compounds of lime mixed with silica and alumina. $CaO \rightarrow 50-6096$ $SiO _{2} \rightarrow 20-2596$ $Al _{2} O _{3} \rightarrow 5-10 \%$ $F e _{2} O _{3} \rightarrow 1-29$ $MgO \rightarrow 2-396$ $SO _{3} \rightarrow 1-2 \%$ and few amount of oxides of iron, magnesium and sulphur.
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Concepts Used:

Anomalous Behaviour of Beryllium

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