Clinkerization
Higher the AM, lighter the color of clinker (cement). Normal range of SM is MgO is commonly present in raw meal. Some of the MgO (2%) is accommodated into the clinker mineral structure, while as extra MgO forms a crystal called periclase and causes mortar expansion. MgO up to 4 % is found common in clinker. Rapid cooling of clinker can mitigate the expansion problems, however higher .