Portland cement is made by calcining at temperature equals to ___________
A. 30000C
B. 15000C
C. 18000C
D. 20000C
Answer:B
Portland cement is made by calcining at temperature equals to ___________
A. 30000C B. 15000C C. 18000C D. 20000C
Explanation: Portland cement is made by calcining at temperature equals to 15000C.