Ting-ye Qi, Hao-chen Wang, Guo-rui Feng, Yu-jiang Zhang, Jin-wen Bai, and Yan-na Han, Effect of calcination temperature on the pozzolanic activity of maize straw stem ash treated with portlandite solution, Int. J. Miner. Metall. Mater.,(2020). https://doi.org/10.1007/s12613-020-2148-3
Cite this article as:
Ting-ye Qi, Hao-chen Wang, Guo-rui Feng, Yu-jiang Zhang, Jin-wen Bai, and Yan-na Han, Effect of calcination temperature on the pozzolanic activity of maize straw stem ash treated with portlandite solution, Int. J. Miner. Metall. Mater.,(2020). https://doi.org/10.1007/s12613-020-2148-3
Research Article

Effect of calcination temperature on the pozzolanic activity of maize straw stem ash treated with portlandite solution

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  • Received: 18 May 2020Revised: 20 July 2020Accepted: 21 July 2020Available online: 24 July 2020
  • The effect of calcination temperature on the pozzolanic activity of maize straw stem ash (MSSA) was evaluated. The MSSA samples calcined at temperature values of 500, 700, and 850 °C were dissolved in portlandite solution for 6 h, and the residual samples were obtained. The MSSA and MSSA residual samples were analyzed using FT-IR, XRD, SEM, and XPS to determine the vibration bonds, minerals, microstructure, and Si 2p transformation behavior. The conductivity, pH value, loss of conductivity with dissolving time of the MSSA-portlandite mixed solution were determined. The main oxide composition of MSSA were silica and potassium oxide. The dissolution of Si4+ content of MSSA at 500 °C were high compared to those of the other calcination temperatures. The conductivity and loss of conductivity of MSSA at 700 °C were high compared to those of the other calcination temperatures at a particular dissolving time due to the higher KCl content in MSSA at 700 °C. C-S-H was easily identified in MSSA samples using XRD, and small cubic and nearly spherical particles of C-S-H were found in the MSSA residual samples. In conclusion, the optimum calcination temperature of MSSA having the best pozzolanic activity is 500 °C but avoid excessive agglomeration.
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