Effects of Foreign Ions on Minerals of High Belite-Calcium Sulfoaluminate Cement

Abstract:

The influence of foreign ions doping on the property of belite - sulfoaluminate (BCSA) clinker with belite and calcium sulfo-aluminate as main minerals was investigated. The research on four foreign doping ions with P⁵⁺, B²⁺, Ba²⁺, and Zn²⁺ was carried out. The mineral components were characterized by SEM, X-ray powder diffraction and Infrared. Some foreign ions entering into the lattice of β-C₂S and during sintering at high temperature attained a high reactivity. The mechanism of the effect of these ions on stabilization and activation of minerals were clarified. Results revealed that P⁵⁺, Ba²⁺, and Zn²⁺ could stabilize and activate β-C₂S as well as enhance reactivity of, but no positive effect of ion B²⁺ was observed. The sequence of influence of different ions on C₂S is: Ba²⁺>P⁵⁺>Reference>Zn²⁺>B³⁺, and the sequence for was: P⁵⁺>Ba²⁺>Zn²⁺>Reference>B³⁺ . Compared to the 28-d compressive strength of reference one, P⁵⁺, Ba²⁺, and Zn²⁺ could enhance the strength by 15.6%, 8.9% and 26.5% respectively.

• Periodical: Materials Science Forum (Volumes 743-744)
• Pages: 239-244
• DOI: https://doi.org/10.4028/www.scientific.net/MSF.743-744.239
• Online since: January 2013
• Authors: Juan Li, Chun Ying Zhou, Ya Jin Yang
• Keywords: Activation, Belite-Calcium Sulphoaluminate Cement (BCSA Cement), Foreign Ions, Stabilization

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