What is cement?

Cement is the material obtained as a result of grinding of Portland Cement clinker with gypsum and with appropriate proportions of additives depending on the type of cement. When blended and mixed appropriately with aggregate and water, cement must maintain sufficient time workability, reach certain strength levels in specified periods, and show volume stability for a long period. The definition of cement in TS EN 197-1 standard  is: "cement is an inorganic finely grinded hydraulic binder, which sets and forms a hardening paste when mixed with water due to hydratation reactions and processes, and which maintains its strength and stability even under water after hardening."