Which Rock Is Used In Cement?
Which Rock Is Used In Cement? Quarried limestone is stockpiled and then is blended with other raw material like clay/shale, silica, iron ore in required proportion. The blended material is then heated at high temperature upto 1400–1450 oC in a kiln to produce clinker. The clinker is grinned along with 3–5% gypsum to produce cement.