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Investigation on the thermo-dynamics of alkali-activated carbonatite

  • Cementitious Materials
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Abstract

The thermo-dynamics of reactions between carbonatite and sodium silicate solution at ordinary temperature (25 °) were investigated. The calculated results indicate that at ordinary temperature, the reactions between dolomite, calcite, Ca2+ and Mg2+ in carbonatite and H4SiO4, H3SiO4 − and H2SiO4 2− in sodium silicate solution to form the cementitious products of hydrated calcium silicate or hydrated magnesium silicate all possibly happen; among these reactions, the reactions to form gyrolite (2CaO·3SiO2·2.5H2O) and serpentine (3MgO·2SiO2·2H2O) are the most possible to occur. Further, the dissociation degree of dolomite and calcite and the activity of H3SiO4 −, H2SiO4 2− and H4SiO4 ions are the key factors to influence the reactions.

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Authors and Affiliations

  1. School of Materials Science and Engineering, South China University of Technology, Guangzhou, 510640, China

    Suhong Yin  (殷素红), Ziyun Wen, Qijun Yu & Jie Hu

  2. Guangdong Low Carbon Technologies Engineering Center for Building Materials, South China University of Technology, Guangzhou, 510640, China

    Suhong Yin  (殷素红), Ziyun Wen, Qijun Yu & Jie Hu

  3. Guangzhou University-Tamkang University Joint Research Center for Engineering Structure Disaster Prevention and Control, Guangzhou University, Guangzhou, 510006, China

    Yuwei Ma

Authors
  1. Suhong Yin  (殷素红)
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  2. Ziyun Wen
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  3. Qijun Yu
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  4. Yuwei Ma
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  5. Jie Hu
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Corresponding author

Correspondence to Suhong Yin  (殷素红).

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Funded by the National Natural Science Foundation of China (No. 51402057)

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Yin, S., Wen, Z., Yu, Q. et al. Investigation on the thermo-dynamics of alkali-activated carbonatite. J. Wuhan Univ. Technol.-Mat. Sci. Edit. 30, 774–780 (2015). https://doi.org/10.1007/s11595-015-1226-2

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  • DOI: https://doi.org/10.1007/s11595-015-1226-2

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