Study on Sintering Technology and Performance of Alite-Rich Cement Modified by C_1.5Sr_2.5A₃S Mineral

Abstract:

The effects of the sintering temperature, sintering time and contents of calcium strontium suphoaluminate (C_1.5Sr_2.5A₃) on the sintering technology of the alite-rich cement clinker modified by C_1.5Sr_2.5A₃ were researched by the orthogonal test method. X-ray diffraction, scanning electron microscope-energy dispersive spectroscopy (SEM-EDS) and lithofacies analysis were used to investigate the compositions and structure of cement. The experimental results show that the optimal sintering temperature and sintering time of alite-rich cement clinker modified by C_1.5Sr_2.5A₃ are 1350 °C and 60 min, and the appropriate content of C_1.5Sr_2.5A₃ in the clinker is 2%. The introduction of C_1.5Sr_2.5A₃ in clinker can promote the formation of alite mineral at low temperature and decrease the sintering temperature of clinker by 100°C approximately. This new-type cement shows excellent mechanics properties. The compressive strength at 3d is up to 64.3MPa, which is increased by 26.7% comparing to that of alite-rich cement and the compressive strength at 28d is almost the same as that of alite-rich cement. For alite-rich cement clinker modified by C_1.5Sr_2.5A₃ calcinated at low temperature, alite still can be mass-formed, but the size decreases.

• Periodical: Advanced Materials Research (Volumes 306-307)
• Pages: 970-974
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.306-307.970
• Online since: August 2011
• Authors: Gui Qiang Li, Shou De Wang, Chao Nan Yin, Ling Chao Lu
• Keywords: Alite, Calcium Strontium Suphoaluminate, Sintering Temperature, Sintering Time

References

[1] H.F. W. Taylor: Cement Chemistry (Thomas Telford Services Ltd, London 1997).

[2] P.Y. Yan: Journal of Wuhan University of Technology Vol. 16 (1994), p.19 (in Chinese)

[3] J. Chang, W.J. Tan, R. Huang, H.Z. Wu and Z.M. Ye: J. Chin. Ceram. Soc. Vol. 38 (2010), p.666 (in Chinese)

[4] L.C. Lu, Z.Y. Lu, S.Q. Liu, S.D. Wang and X. Cheng: Journal of Wuhan University of Technology—Materials Science Edition. Ed. Vol. 24 (2009), p.982

[5] G.Q. Li, L.C. Lu, S.D. Wang, C. Chen and C.N. Yin: Bulletin of the Chinese Ceramic Society Vol. 28 (2009), p.1038 (in Chinese)

[6] L.C. Lu, J. Chang, X. Cheng H. X. Liu, R. Z. Yuan: J. Mater. Sci. Vol. 40 (2005), p.4035

[7] X.C. Liu, Y.J. Li: Cement and Concrete Research Vol. 35 (2005), p.1685

[8] S.H. Ma, X.D. Shen and Y.P. Huang: Journal of Wuhan University of Technology--Materials Science Edition Vol. 23 (2008), p.518

[9] L.C. Lu, W.W. Zhang, H.Z. Xuan and X. Cheng: J. Chin. Ceram. Soc. Vol. 36 (2008), p.165 (in Chinese)

[10] D.X. Li, X.Y. Song, C.C. Gong and Z.H. Pan: Cem. Concr. Res. Vol. 36 (2006), p.1752