Question: The major component/ingredient of Portland Cement is :
tricalcium aluminate
tricalcium silicate
dicalcium aluminate
dicalcium silicate
Correct Option: , 2
Solution:
Major component of portland cement is "Tricalcium silicate $\left(51 \%, 3 \mathrm{CaO} . \mathrm{SiO}_{2}\right)$