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Question
Chemistry
Percentage of CaO present in Portland cement is
Q. Percentage of
C
a
O
present in Portland cement is
198
158
The s-Block Elements
Report Error
A
50
−
60%
B
70
−
80%
C
90%
D
40%
Solution:
The average composition of Portland cement is
C
a
O
,
50
−
60%
;
S
i
O
2
,
20
−
25%
;
A
l
2
O
3
,
5
−
10%
;
M
g
O
,
2
−
3%
;
F
e
2
O
3
,
1
−
2%
and
S
O
3
,
1
−
2%
.
Thus, the percentage of
C
a
O
present in Portland cement is
50
−
60%
.