Individual influence of Na2O and K2O on the properties of Portland cement clinker

In the production of Portland cement clinker the raw mix always contains sodium and potassium oxides, which can accumulate in the calcined material because of their chemical properties, and therefore their amount may increase in the rotary kiln. The Na2O and K2O in the clinker reduce the temperature of C2S occurrence, which can change the microhardness of the clinker minerals and the grindability of the clinker granules. The paper examined the individual effects of Na2O and K2O on the process of C2S formation, microhardness of the silicate phases and the rate of clinker grinding. Earlier C2S formation in the presence of K2O and a higher microhardness of C2S and C3S, obtained at burning the raw mixture with K2O added, than of C2S and C3S, obtained at burning the slurry with Na2O was established. The change in the microhardness of silicate phases reduced the grinding rate of cement by 12.5 %.
Author: D.A. Mishin, A.O. Erygina

Share:  
You can apply for a subscription or order a specific issue of our journal here.
The use of materials published on the site is allowed only with reference to the source (the journal «Cement and its application») and a hyperlink to the quoted material.
© 2007-2022 PetroCem Ltd
Privacy policy