Cement is a mixture of fine grey powder of calcium silicate and calcium aluminate.
While manufacturing cement, the limestone and clay are first crushed in crushes and then grinned into powder.That powder mixed with water to obtain a paste is called slurry.
While heating slurry in rotating kilin in 1600 degree Celsius, then it forms the red colored pea sized balls of calcium silicate and calcium aluminate called cement clinkers.
Note: 2 to 3% gypsum is added to cement to increase its setting time.
The name of the industrial chemicals formed by the mixture of Lime stone and special clay is cement.
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