Reactivity evaluation of red mud as a raw material for cementitious materials: The dissolution characteristics and kinetics of Si and Al
This work evaluated the reactivity of various phases in thermally activated red mud (TARM) in OH- solution, OH- and SO42- complex solution based on BSE-IA-EDS, SEM-EDS and XRD, and provided the dissolution kinetics of Si and Al in TARM. The relationship between the physicochemical properties, dissol...
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| Format: | Article |
| Language: | English |
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Elsevier
2025-06-01
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| Series: | Results in Engineering |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S2590123025015737 |
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| author | Yaguang Wang Wenzhe Shang Yuan Liang Wei Zhang Xiaoming Liu |
| author_facet | Yaguang Wang Wenzhe Shang Yuan Liang Wei Zhang Xiaoming Liu |
| author_sort | Yaguang Wang |
| collection | DOAJ |
| description | This work evaluated the reactivity of various phases in thermally activated red mud (TARM) in OH- solution, OH- and SO42- complex solution based on BSE-IA-EDS, SEM-EDS and XRD, and provided the dissolution kinetics of Si and Al in TARM. The relationship between the physicochemical properties, dissolution behavior, and reactivity of the Si and Al structure in TARM were revealed. The results showed that TARM has three typical mineral phases, and the dissolution order is Ca-Al-Na-Si phase > Ca-Si-Al phase > Fe phase. The dissolution process of Si and Al in TARM is mainly controlled by internal diffusion process, which is most affected by temperature. The OH- and SO42- complex solution have a significant synergistic effect on the dissolution of Si and Al from TARM. The SO42- further dissolves TARM particles mainly by changing the gel property wrapped on the particle surface in OH- environment. This work found and verified that the OH- and SO42- system can significantly improve the reactivity of TARM, which provides a reference for the investigate of TARM as a raw material for cementitious materials. |
| format | Article |
| id | doaj-art-12f9de4b773e4242bcabd7436fdf22b3 |
| institution | OA Journals |
| issn | 2590-1230 |
| language | English |
| publishDate | 2025-06-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Results in Engineering |
| spelling | doaj-art-12f9de4b773e4242bcabd7436fdf22b32025-08-20T02:17:19ZengElsevierResults in Engineering2590-12302025-06-012610550310.1016/j.rineng.2025.105503Reactivity evaluation of red mud as a raw material for cementitious materials: The dissolution characteristics and kinetics of Si and AlYaguang Wang0Wenzhe Shang1Yuan Liang2Wei Zhang3Xiaoming Liu4School of Civil Engineering and Architecture, Henan University, Kaifeng 475004, PR China; Corresponding authors.School of Civil Engineering and Architecture, Henan University, Kaifeng 475004, PR ChinaSchool of Civil Engineering and Architecture, Henan University, Kaifeng 475004, PR ChinaDepartment of Civil Engineering, Hebei Agricultural University, Baoding, 071001, PR ChinaSchool of Metallurgical and Ecological Engineering, University of Science and Technology Beijing, Beijing 100083, PR China; Corresponding authors.This work evaluated the reactivity of various phases in thermally activated red mud (TARM) in OH- solution, OH- and SO42- complex solution based on BSE-IA-EDS, SEM-EDS and XRD, and provided the dissolution kinetics of Si and Al in TARM. The relationship between the physicochemical properties, dissolution behavior, and reactivity of the Si and Al structure in TARM were revealed. The results showed that TARM has three typical mineral phases, and the dissolution order is Ca-Al-Na-Si phase > Ca-Si-Al phase > Fe phase. The dissolution process of Si and Al in TARM is mainly controlled by internal diffusion process, which is most affected by temperature. The OH- and SO42- complex solution have a significant synergistic effect on the dissolution of Si and Al from TARM. The SO42- further dissolves TARM particles mainly by changing the gel property wrapped on the particle surface in OH- environment. This work found and verified that the OH- and SO42- system can significantly improve the reactivity of TARM, which provides a reference for the investigate of TARM as a raw material for cementitious materials.http://www.sciencedirect.com/science/article/pii/S2590123025015737Thermally activated red mudCementitious materialsDissolution kineticsAlkali and sulfate systemSynergistic effect |
| spellingShingle | Yaguang Wang Wenzhe Shang Yuan Liang Wei Zhang Xiaoming Liu Reactivity evaluation of red mud as a raw material for cementitious materials: The dissolution characteristics and kinetics of Si and Al Results in Engineering Thermally activated red mud Cementitious materials Dissolution kinetics Alkali and sulfate system Synergistic effect |
| title | Reactivity evaluation of red mud as a raw material for cementitious materials: The dissolution characteristics and kinetics of Si and Al |
| title_full | Reactivity evaluation of red mud as a raw material for cementitious materials: The dissolution characteristics and kinetics of Si and Al |
| title_fullStr | Reactivity evaluation of red mud as a raw material for cementitious materials: The dissolution characteristics and kinetics of Si and Al |
| title_full_unstemmed | Reactivity evaluation of red mud as a raw material for cementitious materials: The dissolution characteristics and kinetics of Si and Al |
| title_short | Reactivity evaluation of red mud as a raw material for cementitious materials: The dissolution characteristics and kinetics of Si and Al |
| title_sort | reactivity evaluation of red mud as a raw material for cementitious materials the dissolution characteristics and kinetics of si and al |
| topic | Thermally activated red mud Cementitious materials Dissolution kinetics Alkali and sulfate system Synergistic effect |
| url | http://www.sciencedirect.com/science/article/pii/S2590123025015737 |
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