Composition design for high C₃S cement clinker and its mineral formation

Abstract

A new composition of Portland cement clinker was studied, in which KH, SM and IM was 0.98,2.4 and 2.4 respectively as well as its meal added 1%CuO (in mass). Fired at 1 200 °C,1 350 °C,1 400 °C and 1 450 °C for 30 min, the resultant mineral phases component and mineral morphology were analyzed. The performances of the cement which was made of clinker burned at 1 450 °C and fly ash were determined. By means of QXRD, XRD and optical microscopy, it is shown that the clinker burnt at 1 450 °C has the larger size crystals and distinct crystal interface, in which the C₃S content is 73.37% and the mineral phases is dominantly C₃S, following by minor C₂S, C₃A and tetracalcium aluminoferrite. The results reveal that a new type of high C₃S content clinker can completely be made by traditional temperature-time schedule. The performances of the cement produced from this clinker with addtion of 50% fly ash and 5% gupsum were in agreement with the 32.5 strength grade of Portland fly-ash cement. The results also show that the clinker has a significant effect of saving energy and utilizing waste slag.

Keywords

tricalcium silicate / fly ash / cement clinker / copper oxide

References

[1] Kolovos K., Tsivilis S., Kakali G. The Effect of Foreign Ions on the Reactivity of the CaO-SiO₂-Al₂O₃-Fe₂O₃ System, Part II. Cations[J]. Cem. Com. Res., 2002, 32: 463-469.

[2] Kolovos K., Tsivilis S., Kakali G. The Effect of Foreign Ions on the Reactivity of the CaO-SiO₂-Al₂O₃-Fe₂O₃ System, Part I: Anions[J]. Cem. Com. Res., 2001, 31: 425-429.

[3] Dagen S., Dongsheng Y., Qixiu H. The Effect of Rare Earth Elements on Cement Clinker Formation[J]. Chin. Ceram. Soc. Bull., 1996, 17(5): 18-22.

[4] Weiming C., Zonghan L. Studies of the Intermediate Minerals Formation Pattern and the Improvement of C₃S Formation at Low Temperature in the Presence of F and SO₃[J]. J. Chin. Ceram. Soc., 1997, 25(6): 651-656.

[5] Yuhua L. K Value Method of Quantitative X-ray Diffraction Analysis for Cement Clinker Mineral Phases[J]. Cement Engineering, 2001, 64(3): 34-37.