Microscopic analysis of carbonated steel slag and its impact on properties of cementitious materials
Carbonation has been considered an effective approach to improve quality of steel slag (SS) as supplementary cementitious material in concrete manufacture and relief overall CO2 emission. To reveal impact of carbonation degree on properties of SS, experiments regarding effects of carbonation duratio...
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| Format: | Article |
| Language: | English |
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Elsevier
2025-07-01
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| Series: | Case Studies in Construction Materials |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S2214509525000166 |
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| author | Yaocheng Wang Xiong Xie Xin Wang Yingwu Zhou Baojian Zhan Feng Xing Hongzhi Cui |
| author_facet | Yaocheng Wang Xiong Xie Xin Wang Yingwu Zhou Baojian Zhan Feng Xing Hongzhi Cui |
| author_sort | Yaocheng Wang |
| collection | DOAJ |
| description | Carbonation has been considered an effective approach to improve quality of steel slag (SS) as supplementary cementitious material in concrete manufacture and relief overall CO2 emission. To reveal impact of carbonation degree on properties of SS, experiments regarding effects of carbonation duration, pressure and liquid-solid ratio (L/S) were conducted. Also, mineralogy and morphology of SS during the carbonation process and impacts on properties of cementitious materials were compared. Results showed that CO2 uptake rate could reach 12.06 % after a 2 h treatment with the pressure and L/S of 0.3 MPa and 0.2, respectively. The carbonation treatment decreases contents of f-CaO and C2S in SS, yield CaCO3 and SiO2 gel; surface roughness is increased, leading to an elevated water requirement of normal consistency, extended setting times and higher rheological yield stress; resolves retarding effect of SS on cement early hydration. Furthermore, carbonation treatment improves SS activity, a high carbonation degree enhances compressive strength and reduces porosity in cementitious materials, attributed to SiO2 gel and nucleation effect of CaCO3. |
| format | Article |
| id | doaj-art-0fd81890e1cc475b8bfb95d1d1deade0 |
| institution | Kabale University |
| issn | 2214-5095 |
| language | English |
| publishDate | 2025-07-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Case Studies in Construction Materials |
| spelling | doaj-art-0fd81890e1cc475b8bfb95d1d1deade02025-01-12T05:24:59ZengElsevierCase Studies in Construction Materials2214-50952025-07-0122e04217Microscopic analysis of carbonated steel slag and its impact on properties of cementitious materialsYaocheng Wang0Xiong Xie1Xin Wang2Yingwu Zhou3Baojian Zhan4Feng Xing5Hongzhi Cui6Key Laboratory for Resilient Infrastructures of Coastal Cities (Shenzhen University), Ministry of Education, Shenzhen 518060, China; College of Civil and Transportation Engineering, Shenzhen University, Shenzhen 518060, China; Guangdong Provincial Key Laboratory of Durability for Marine Civil Engineering, Shenzhen Durability Centre for Civil Engineering, Shenzhen 518060, ChinaCollege of Civil and Transportation Engineering, Shenzhen University, Shenzhen 518060, China; Guangdong Provincial Key Laboratory of Durability for Marine Civil Engineering, Shenzhen Durability Centre for Civil Engineering, Shenzhen 518060, ChinaCollege of Civil and Transportation Engineering, Shenzhen University, Shenzhen 518060, China; Guangdong Provincial Key Laboratory of Durability for Marine Civil Engineering, Shenzhen Durability Centre for Civil Engineering, Shenzhen 518060, China; Corresponding author at: College of Civil and Transportation Engineering, Shenzhen University, Shenzhen 518060, China.College of Civil and Transportation Engineering, Shenzhen University, Shenzhen 518060, China; Guangdong Provincial Key Laboratory of Durability for Marine Civil Engineering, Shenzhen Durability Centre for Civil Engineering, Shenzhen 518060, ChinaCollege of Civil and Transportation Engineering, Shenzhen University, Shenzhen 518060, China; Guangdong Provincial Key Laboratory of Durability for Marine Civil Engineering, Shenzhen Durability Centre for Civil Engineering, Shenzhen 518060, ChinaGuangdong Provincial Key Laboratory of Durability for Marine Civil Engineering, Shenzhen Durability Centre for Civil Engineering, Shenzhen 518060, ChinaKey Laboratory for Resilient Infrastructures of Coastal Cities (Shenzhen University), Ministry of Education, Shenzhen 518060, China; College of Civil and Transportation Engineering, Shenzhen University, Shenzhen 518060, China; Guangdong Provincial Key Laboratory of Durability for Marine Civil Engineering, Shenzhen Durability Centre for Civil Engineering, Shenzhen 518060, ChinaCarbonation has been considered an effective approach to improve quality of steel slag (SS) as supplementary cementitious material in concrete manufacture and relief overall CO2 emission. To reveal impact of carbonation degree on properties of SS, experiments regarding effects of carbonation duration, pressure and liquid-solid ratio (L/S) were conducted. Also, mineralogy and morphology of SS during the carbonation process and impacts on properties of cementitious materials were compared. Results showed that CO2 uptake rate could reach 12.06 % after a 2 h treatment with the pressure and L/S of 0.3 MPa and 0.2, respectively. The carbonation treatment decreases contents of f-CaO and C2S in SS, yield CaCO3 and SiO2 gel; surface roughness is increased, leading to an elevated water requirement of normal consistency, extended setting times and higher rheological yield stress; resolves retarding effect of SS on cement early hydration. Furthermore, carbonation treatment improves SS activity, a high carbonation degree enhances compressive strength and reduces porosity in cementitious materials, attributed to SiO2 gel and nucleation effect of CaCO3.http://www.sciencedirect.com/science/article/pii/S2214509525000166Steel slagCarbonationMineralogyMorphologyCementitious materials |
| spellingShingle | Yaocheng Wang Xiong Xie Xin Wang Yingwu Zhou Baojian Zhan Feng Xing Hongzhi Cui Microscopic analysis of carbonated steel slag and its impact on properties of cementitious materials Case Studies in Construction Materials Steel slag Carbonation Mineralogy Morphology Cementitious materials |
| title | Microscopic analysis of carbonated steel slag and its impact on properties of cementitious materials |
| title_full | Microscopic analysis of carbonated steel slag and its impact on properties of cementitious materials |
| title_fullStr | Microscopic analysis of carbonated steel slag and its impact on properties of cementitious materials |
| title_full_unstemmed | Microscopic analysis of carbonated steel slag and its impact on properties of cementitious materials |
| title_short | Microscopic analysis of carbonated steel slag and its impact on properties of cementitious materials |
| title_sort | microscopic analysis of carbonated steel slag and its impact on properties of cementitious materials |
| topic | Steel slag Carbonation Mineralogy Morphology Cementitious materials |
| url | http://www.sciencedirect.com/science/article/pii/S2214509525000166 |
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