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Alumina, silica, lime and iron oxide are the basic raw material for the manufacture of portland cement. The component of Portland cement which first hardens is

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Question: Alumina, silica, lime and iron oxide are the basic raw material for the manufacture of portland cement. The component of Portland cement which first hardens is
[A].

5CaO . 3 Al2O3

[B].

3CaO . Al2O3

[C].

3CaO . SiO2

[D].

2CaO . SiO2

Answer: Option A

Explanation:

No answer description available for this question.