· The introduction of CO 2 taxes in Europe and elsewhere adds a further twist to the story. For major groups, especially, decisions made in balancing maintenance, investments, operations and purchasing requirements all have to take into account the impact on their energy footprint. Global scene. Globally a cement major such as Italcementi consumes annually some .
The clinkers are grinded finely into powder in ball mill or tube mill. Powdered gypsum is added around 23% as retarding agent during final grinding. The final obtained product is cement that does not settle quickly when comes in contact with water. After the initial setting time of the cement, the cement becomes stiff and the gypsum retards the dissolution of tricalcium .