The percentage composition of alumina in Portland cement is ___________
A. 60-69
B. 17-25
C. 3-8
D. 2-4
Answer:C
The percentage composition of alumina in Portland cement is ___________
A. 60-69 B. 17-25 C. 3-8 D. 2-4
Explanation: The percentage composition of alumina in portland cement is 3-8 %.