High-dosage carbide slag-based cementitious material: Workability, mechanical strength, and carbonation behavior with the performance enhancement
Cement production generates substantial carbon emissions, necessitating low-carbon alternatives. This study utilized high-dosage carbide slag, a solid waste byproduct of the acetylene industry, to prepare an environmentally friendly and low carbon cementitious materials-CFG (Carbide slag-Fly ash-GGB...
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| Format: | Article |
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Elsevier
2025-12-01
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| Series: | Case Studies in Construction Materials |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S221450952500943X |
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| author | Yulong Zheng Chang Liu Jingquan Wang Haozhe Pan Xingpei Yan Stuart T. Wagland Guiyu Zhang Liang Cheng |
| author_facet | Yulong Zheng Chang Liu Jingquan Wang Haozhe Pan Xingpei Yan Stuart T. Wagland Guiyu Zhang Liang Cheng |
| author_sort | Yulong Zheng |
| collection | DOAJ |
| description | Cement production generates substantial carbon emissions, necessitating low-carbon alternatives. This study utilized high-dosage carbide slag, a solid waste byproduct of the acetylene industry, to prepare an environmentally friendly and low carbon cementitious materials-CFG (Carbide slag-Fly ash-GGBS system). To investigate the comprehensive performance of CFG, the effects of different dosages of carbide slag (CS, 10 %-70 %) and silica fume (SF, 0 % or 10 %), as well as the CO2 capture capacity, were investigated. The environmental assessment was also carried out by using the Life Cycle Assessment (LCA) method. The flexural and compressive strengths of CFG with 10 % CS reached 7.7 and 29.2 MPa, respectively, at 28 days. It is clear from the micro-analysis that the CS mainly acts as an alkaline stimulant in the cementitious system and can effectively activate FA and GGBS to produce gels. Excessive CS in the system caused Ca(OH)2 accumulation, which negatively affected the system’s strength. This can be remedied by adding SF and carbonization. In particular, after carbonation, the compressive strength of specimens with 30 % CS increased by 32.7 % from 31.1 MPa to 35.7 MPa and with 70 % CS increase by 80 % from 11 MPa to 19.8 MPa, demonstrating excellent carbon sequestration enhancement properties. The environmental evaluation of the system using LCA shows a substantial suppression of CO2 emissions and energy consumption, with 89.12 % and 80.35 % reduction, respectively, compared with ordinary Portland cement. Therefore, along with the massive consumption of solid waste, CFG is an environmentally friendly material with the potential to replace conventional cement. |
| format | Article |
| id | doaj-art-656749fb46bc4496b879fbb643e580f7 |
| institution | Kabale University |
| issn | 2214-5095 |
| language | English |
| publishDate | 2025-12-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Case Studies in Construction Materials |
| spelling | doaj-art-656749fb46bc4496b879fbb643e580f72025-08-20T03:40:21ZengElsevierCase Studies in Construction Materials2214-50952025-12-0123e0514510.1016/j.cscm.2025.e05145High-dosage carbide slag-based cementitious material: Workability, mechanical strength, and carbonation behavior with the performance enhancementYulong Zheng0Chang Liu1Jingquan Wang2Haozhe Pan3Xingpei Yan4Stuart T. Wagland5Guiyu Zhang6Liang Cheng7Faculty of Civil Engineering and Mechanics, Jiangsu University, Zhenjiang, Jiangsu 212013, China; Corresponding authors.Faculty of Civil Engineering and Mechanics, Jiangsu University, Zhenjiang, Jiangsu 212013, ChinaFaculty of Civil Engineering and Mechanics, Jiangsu University, Zhenjiang, Jiangsu 212013, China; Corresponding authors.Faculty of Materials and Civil Engineering, Jiangsu University Jingjiang College, Zhenjiang, Jiangsu 212028, China; Faculty of Engineering and Applied Sciences, Cranfield University, Cranfield MK43 0AL, UK; Corresponding author at: Faculty of Materials and Civil Engineering, Jiangsu University Jingjiang College, Zhenjiang, Jiangsu 212028, China.Faculty of Civil Engineering and Mechanics, Jiangsu University, Zhenjiang, Jiangsu 212013, China; Faculty of Materials and Civil Engineering, Jiangsu University Jingjiang College, Zhenjiang, Jiangsu 212028, ChinaFaculty of Engineering and Applied Sciences, Cranfield University, Cranfield MK43 0AL, UKFaculty of Civil Engineering and Mechanics, Jiangsu University, Zhenjiang, Jiangsu 212013, ChinaSchool of Environment and Safety Engineering, Jiangsu University, Zhenjiang, Jiangsu 212013, ChinaCement production generates substantial carbon emissions, necessitating low-carbon alternatives. This study utilized high-dosage carbide slag, a solid waste byproduct of the acetylene industry, to prepare an environmentally friendly and low carbon cementitious materials-CFG (Carbide slag-Fly ash-GGBS system). To investigate the comprehensive performance of CFG, the effects of different dosages of carbide slag (CS, 10 %-70 %) and silica fume (SF, 0 % or 10 %), as well as the CO2 capture capacity, were investigated. The environmental assessment was also carried out by using the Life Cycle Assessment (LCA) method. The flexural and compressive strengths of CFG with 10 % CS reached 7.7 and 29.2 MPa, respectively, at 28 days. It is clear from the micro-analysis that the CS mainly acts as an alkaline stimulant in the cementitious system and can effectively activate FA and GGBS to produce gels. Excessive CS in the system caused Ca(OH)2 accumulation, which negatively affected the system’s strength. This can be remedied by adding SF and carbonization. In particular, after carbonation, the compressive strength of specimens with 30 % CS increased by 32.7 % from 31.1 MPa to 35.7 MPa and with 70 % CS increase by 80 % from 11 MPa to 19.8 MPa, demonstrating excellent carbon sequestration enhancement properties. The environmental evaluation of the system using LCA shows a substantial suppression of CO2 emissions and energy consumption, with 89.12 % and 80.35 % reduction, respectively, compared with ordinary Portland cement. Therefore, along with the massive consumption of solid waste, CFG is an environmentally friendly material with the potential to replace conventional cement.http://www.sciencedirect.com/science/article/pii/S221450952500943XCarbide slagWorking and mechanical propertiesCarbon captureHydration mechanismSolid wastes |
| spellingShingle | Yulong Zheng Chang Liu Jingquan Wang Haozhe Pan Xingpei Yan Stuart T. Wagland Guiyu Zhang Liang Cheng High-dosage carbide slag-based cementitious material: Workability, mechanical strength, and carbonation behavior with the performance enhancement Case Studies in Construction Materials Carbide slag Working and mechanical properties Carbon capture Hydration mechanism Solid wastes |
| title | High-dosage carbide slag-based cementitious material: Workability, mechanical strength, and carbonation behavior with the performance enhancement |
| title_full | High-dosage carbide slag-based cementitious material: Workability, mechanical strength, and carbonation behavior with the performance enhancement |
| title_fullStr | High-dosage carbide slag-based cementitious material: Workability, mechanical strength, and carbonation behavior with the performance enhancement |
| title_full_unstemmed | High-dosage carbide slag-based cementitious material: Workability, mechanical strength, and carbonation behavior with the performance enhancement |
| title_short | High-dosage carbide slag-based cementitious material: Workability, mechanical strength, and carbonation behavior with the performance enhancement |
| title_sort | high dosage carbide slag based cementitious material workability mechanical strength and carbonation behavior with the performance enhancement |
| topic | Carbide slag Working and mechanical properties Carbon capture Hydration mechanism Solid wastes |
| url | http://www.sciencedirect.com/science/article/pii/S221450952500943X |
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