insoluble anhydrite and cement grinding
Role Of Gypsum In Cement And Its Effects The Constructor. the mixture then sent to final grinding process. for ordinary portland cement it remains between 3 to 4 and in case of quick setting cement it can be reduced up to 2.5. role of gypsum in cement. the main purpose of adding gypsum in the cement is to slow down the hydration process of cement once it is mixed with water.