For a good quality cement,the ratio of silica (SiO_2) to alumina (Al_2 – InterviewSolution

1.	For a good quality cement,the ratio of silica (SiO_2) to alumina (Al_2O_3) is between :-
Answer» 1.5 - 2.5 2.5 - 4.0 3.0 - 4.5 2.0 - 3.5 Answer :B

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