Description : Write a note on the manufacture of Cement
Last Answer : Ans ; Cement is an important building material. It was first introduced in England in 1824 by Joseph Asphdin. It is also called Portland cement because it resembles with the natural limestone ... silicate (Ca2SiO4) 26%, tricalcium silicate (Ca3SiO5) 51% and tricalcium aluminate (Ca3Al2O6) 11%.