Performance of cement produced with separate grinding process

The pilot test of cement clinker and admixture was carried on to verify the theory of the optimum particle size distribution of different components of cement.The results showed that the separate grinding cement clinker could reach the demand of the optimum particle size distribution,and the clinker had a sufficient hydration degree;the filling effect and activity effect of admixture could exerted with a less feature grain size than that of clinker by separate grinding.After separate grinding,the P·I cement blended with 6% ultra fine kiln dust,30% GGBS and 4% fly ash had a lower hydration heat,and the compressive strength of 3d,7d,28d,90d increased 5.0MPa,7.3MPa,7.6MPa,11.4MPa.So the separate grinding process had a certain advantage than traditional grinding process.The typical separate grinding process of overseas was presented too.