Temperature-regulated ammonium carbonate curing of steel slag: Enhanced carbonation, strength, and CO2 mineralization for sustainable building materials
This study systematically examines the effects of temperature on the carbonation consolidation of steel slag in ammonium carbonate solution, aiming to develop sustainable building materials and improve CO2 mineralization efficiency. By exposing steel slag compacts to curing temperatures of 20 °C, 40...
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Elsevier
2025-09-01
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| Series: | Journal of Materials Research and Technology |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S2238785425019210 |
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| author | Ziping Pan Jiajie Li Xingtong Yue Zeping Wu Dongdong Zhang Yingxi Hu Wen Ni Michael Hitch |
| author_facet | Ziping Pan Jiajie Li Xingtong Yue Zeping Wu Dongdong Zhang Yingxi Hu Wen Ni Michael Hitch |
| author_sort | Ziping Pan |
| collection | DOAJ |
| description | This study systematically examines the effects of temperature on the carbonation consolidation of steel slag in ammonium carbonate solution, aiming to develop sustainable building materials and improve CO2 mineralization efficiency. By exposing steel slag compacts to curing temperatures of 20 °C, 40 °C, and 60 °C, the research shows that higher temperatures significantly enhance both the compressive strength and carbonation conversion of the material. Specifically, the 60 °C curing group achieved a peak compressive strength of 118.38 MPa, which is 114 % greater than at 20 °C, emphasizing the vital role of temperature in speeding up reaction kinetics and fostering the formation of strong carbonation-hydration products. Comprehensive characterizations—including uniaxial compression, total carbon analysis, XRD, TG-DTG, FT-IR, and SEM—indicate that higher temperatures promote Ca2+ dissolution, increase calcium carbonate crystallinity, and encourage the development of denser microstructures. The addition of ammonium carbonate not only aids mass transfer and Ca2+ extraction but also introduces a new mineralization pathway involving carbamate ions. These findings offer a theoretical and experimental basis for optimizing the carbonation process of steel slag, advancing its use as an eco-friendly construction material with significant CO2 sequestration potential. |
| format | Article |
| id | doaj-art-a62d0e0f4bbb4b0b8618265eff9aa6ed |
| institution | DOAJ |
| issn | 2238-7854 |
| language | English |
| publishDate | 2025-09-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Journal of Materials Research and Technology |
| spelling | doaj-art-a62d0e0f4bbb4b0b8618265eff9aa6ed2025-08-20T02:49:55ZengElsevierJournal of Materials Research and Technology2238-78542025-09-013889390410.1016/j.jmrt.2025.07.264Temperature-regulated ammonium carbonate curing of steel slag: Enhanced carbonation, strength, and CO2 mineralization for sustainable building materialsZiping Pan0Jiajie Li1Xingtong Yue2Zeping Wu3Dongdong Zhang4Yingxi Hu5Wen Ni6Michael Hitch7Key Laboratory of Efficient Mining and Safety of Metal Mines, Ministry of Education, School of Resource and Safety Engineering, University of Science and Technology Beijing, Beijing, 100083, ChinaKey Laboratory of Efficient Mining and Safety of Metal Mines, Ministry of Education, School of Resource and Safety Engineering, University of Science and Technology Beijing, Beijing, 100083, China; Corresponding author.Key Laboratory of Efficient Mining and Safety of Metal Mines, Ministry of Education, School of Resource and Safety Engineering, University of Science and Technology Beijing, Beijing, 100083, China; Corresponding author.Key Laboratory of Efficient Mining and Safety of Metal Mines, Ministry of Education, School of Resource and Safety Engineering, University of Science and Technology Beijing, Beijing, 100083, ChinaKey Laboratory of Efficient Mining and Safety of Metal Mines, Ministry of Education, School of Resource and Safety Engineering, University of Science and Technology Beijing, Beijing, 100083, ChinaKey Laboratory of Efficient Mining and Safety of Metal Mines, Ministry of Education, School of Resource and Safety Engineering, University of Science and Technology Beijing, Beijing, 100083, ChinaKey Laboratory of Efficient Mining and Safety of Metal Mines, Ministry of Education, School of Resource and Safety Engineering, University of Science and Technology Beijing, Beijing, 100083, ChinaFaculty of Science, University of the Fraser Valley, Abbotsford, V2S 7M8, BC, CanadaThis study systematically examines the effects of temperature on the carbonation consolidation of steel slag in ammonium carbonate solution, aiming to develop sustainable building materials and improve CO2 mineralization efficiency. By exposing steel slag compacts to curing temperatures of 20 °C, 40 °C, and 60 °C, the research shows that higher temperatures significantly enhance both the compressive strength and carbonation conversion of the material. Specifically, the 60 °C curing group achieved a peak compressive strength of 118.38 MPa, which is 114 % greater than at 20 °C, emphasizing the vital role of temperature in speeding up reaction kinetics and fostering the formation of strong carbonation-hydration products. Comprehensive characterizations—including uniaxial compression, total carbon analysis, XRD, TG-DTG, FT-IR, and SEM—indicate that higher temperatures promote Ca2+ dissolution, increase calcium carbonate crystallinity, and encourage the development of denser microstructures. The addition of ammonium carbonate not only aids mass transfer and Ca2+ extraction but also introduces a new mineralization pathway involving carbamate ions. These findings offer a theoretical and experimental basis for optimizing the carbonation process of steel slag, advancing its use as an eco-friendly construction material with significant CO2 sequestration potential.http://www.sciencedirect.com/science/article/pii/S2238785425019210Steel slag carbonationAmmonium carbonate curingCO2 mineralizationCompressive strengthSustainable building materialsCuring temperature |
| spellingShingle | Ziping Pan Jiajie Li Xingtong Yue Zeping Wu Dongdong Zhang Yingxi Hu Wen Ni Michael Hitch Temperature-regulated ammonium carbonate curing of steel slag: Enhanced carbonation, strength, and CO2 mineralization for sustainable building materials Journal of Materials Research and Technology Steel slag carbonation Ammonium carbonate curing CO2 mineralization Compressive strength Sustainable building materials Curing temperature |
| title | Temperature-regulated ammonium carbonate curing of steel slag: Enhanced carbonation, strength, and CO2 mineralization for sustainable building materials |
| title_full | Temperature-regulated ammonium carbonate curing of steel slag: Enhanced carbonation, strength, and CO2 mineralization for sustainable building materials |
| title_fullStr | Temperature-regulated ammonium carbonate curing of steel slag: Enhanced carbonation, strength, and CO2 mineralization for sustainable building materials |
| title_full_unstemmed | Temperature-regulated ammonium carbonate curing of steel slag: Enhanced carbonation, strength, and CO2 mineralization for sustainable building materials |
| title_short | Temperature-regulated ammonium carbonate curing of steel slag: Enhanced carbonation, strength, and CO2 mineralization for sustainable building materials |
| title_sort | temperature regulated ammonium carbonate curing of steel slag enhanced carbonation strength and co2 mineralization for sustainable building materials |
| topic | Steel slag carbonation Ammonium carbonate curing CO2 mineralization Compressive strength Sustainable building materials Curing temperature |
| url | http://www.sciencedirect.com/science/article/pii/S2238785425019210 |
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