Unveiling the Carbonation Behavior and Microstructural Changes of Magnesium Slag at 0 ℃

Authors

  • Junhao Ye

    Henan Key Laboratory of Materials on Deep-Earth Engineering, School of Materials Science and Engineering, Henan Polytechnic University, Jiaozuo, Henan, 454003, China
  • Songhui Liu

    Henan Key Laboratory of Materials on Deep-Earth Engineering, School of Materials Science and Engineering, Henan Polytechnic University, Jiaozuo, Henan, 454003, China
  • Jingrui Fang

    State Key Laboratory of Green Building Materials, China Building Materials Academy, Beijing, 100024, China
  • Xuemao Guan

    Henan Key Laboratory of Materials on Deep-Earth Engineering, School of Materials Science and Engineering, Henan Polytechnic University, Jiaozuo, Henan, 454003, China
  • Hui Guo

    Henan Key Laboratory of Materials on Deep-Earth Engineering, School of Materials Science and Engineering, Henan Polytechnic University, Jiaozuo, Henan, 454003, China

DOI:

https://doi.org/10.30564/jbms.v5i2.6092
Received: 19 November 2023 | Revised: 11 December 2023 | Accepted: 20 December 2023 | Published Online: 27 December 2023

Abstract

Magnesium slag (MS) is an industrial byproduct with high CO2 sequestration potential. This study investigates the carbonation behavior and microstructural changes of MS during wet carbonation at 0 °C. XRD, TG, FTIR, SEM, and BET techniques were used to characterize the phase composition, microstructure, and porosity of MS samples carbonated for different durations. The results showed that the main carbonation products were calcite, vaterite, and highly polymerized silica gel, with particle sizes around 1 μm. The low-temperature environment retarded the carbonation reaction rate and affected the morphology and crystallization of calcium carbonate. After 480 min of carbonation, the specific surface area and porosity of MS increased substantially by 740% and 144.6%, respectively, indicating improved reactivity. The microstructure of carbonated MS became denser with calcite particles surrounded by silica gel. This study demonstrates that wet carbonation of MS at 0 °C significantly enhances its properties, creating an ultrafine supplementary cementitious material with considerable CO2 sequestration capacity.

Keywords:

Wet carbonation; Ultrafine supplementary cementitious materials; Calcium carbonate; Magnesium slag

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How to Cite

Junhao Ye, Songhui Liu, Jingrui Fang, Xuemao Guan, & Hui Guo. (2023). Unveiling the Carbonation Behavior and Microstructural Changes of Magnesium Slag at 0 ℃. Journal of Building Material Science, 5(2), 37–50. https://doi.org/10.30564/jbms.v5i2.6092

Issue

Vol. 5 , Iss. 2 (December 2023)

Article Type

Article

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Copyright © 2023 Junhao Ye, Songhui Liu, Jingrui Fang, Xuemao Guan, Hui Guo

Creative Commons License

This is an open access article under the Creative Commons Attribution-NonCommercial 4.0 International (CC BY-NC 4.0) License.

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