Dredged marine soil stabilization using magnesia cement augmented with biochar/slag
文献类型：期刊论文
| 作者 | Onyekwena, Chikezie Chimere1,2; Li, Qi1,2 ; Wang, Yong1,2; Alvi, Ishrat Hameed1,2; Li, Wentao3; Hou, Yunlu1,2; Zhang, Xianwei2,4; Zhang, Min5
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| 刊名 | JOURNAL OF ROCK MECHANICS AND GEOTECHNICAL ENGINEERING
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| 出版日期 | 2024-03-01 |
| 卷号 | 16期号:3页码:1000-1017 |
| 关键词 | Dredged marine soil CO2 uptake Reactive magnesia Biochar Ground granulated blast-furnace slag |
| ISSN号 | 1674-7755 |
| DOI | 10.1016/j.jrmge.2023.05.005 |
| 英文摘要 | Dredged marine soils (DMS) have poor engineering properties, which limit their usage in construction projects. This research examines the application of reactive magnesia (rMgO) containing supplementary cementitious materials (SCMs) to stabilize DMS under ambient and carbon dioxide (CO 2 ) curing conditions. Several proprietary experimental tests were conducted to investigate the stabilized DMS. Furthermore, the carbonation -induced mineralogical, thermal, and microstructural properties change of the samples were explored. The findings show that the compressive strength of the stabilized DMS ful filled the 7-d requirement (0.7-2.1 MPa) for pavement and building foundations. Replacing rMgO with SCMs such as biochar or ground granulated blast -furnace slag (GGBS) altered the engineering properties and particle packing of the stabilized soils, thus in fluencing their performances. Biochar increased the porosity of the samples, facilitating higher CO 2 uptake and improved ductility, while GGBS decreased porosity and increased the dry density of the samples, resulting in higher strength. The addition of SCMs also enhanced the water retention capacity and modi fied the pH of the samples. Microstructural analysis revealed that the hydrated magnesium carbonates precipitated in the carbonated samples provided better cementation effects than brucite formed during rMgO hydration. Moreover, incorporating SCMs reduced the overall global warming potential and energy demand of the rMgO-based systems. The biochar mixes demonstrated lower toxicity and energy consumption. Ultimately, the rMgO and biochar blend can serve as an environmentally friendly additive for soft soil stabilization and permanent fixation of signi ficant amounts of CO 2 in soils through mineral carbonation, potentially reducing environmental pollution while meeting urbanization needs. (c) 2024 Institute of Rock and Soil Mechanics, Chinese Academy of Sciences. Production and hosting by Elsevier B.V. This is an open access article under the CC BY -NC -ND license (http://creativecommons.org/ licenses/by-nc-nd/4.0/). |
| 资助项目 | Creative Groups of Natural Science Foundation of Hubei Province[2021CFA030] |
| WOS研究方向 | Engineering |
| 语种 | 英语 |
| WOS记录号 | WOS:001239658200001 |
| 出版者 | SCIENCE PRESS |
| 源URL | [http://119.78.100.198/handle/2S6PX9GI/41615]  |
| 专题 | 中科院武汉岩土力学所 |
| 通讯作者 | Li, Qi; Zhang, Min |
| 作者单位 | 1.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 2.Chinese Acad Sci, Inst Rock & Soil Mech, State Key Lab Geomech & Geotech Engn, Wuhan 430071, Peoples R China 3.Hubei Univ Technol, Sch Civil Engn Architecture & Environm, Wuhan 430068, Peoples R China 4.Wuhan Univ Sci & Technol, Sch Urban Construction, Wuhan 430065, Peoples R China 5.Henan Univ, Sch Civil Engn & Archtitecture, Kaifeng 475001, Peoples R China |
| 推荐引用方式 GB/T 7714 | Onyekwena, Chikezie Chimere,Li, Qi,Wang, Yong,et al. Dredged marine soil stabilization using magnesia cement augmented with biochar/slag[J]. JOURNAL OF ROCK MECHANICS AND GEOTECHNICAL ENGINEERING,2024,16(3):1000-1017. |
| APA | Onyekwena, Chikezie Chimere.,Li, Qi.,Wang, Yong.,Alvi, Ishrat Hameed.,Li, Wentao.,...&Zhang, Min.(2024).Dredged marine soil stabilization using magnesia cement augmented with biochar/slag.JOURNAL OF ROCK MECHANICS AND GEOTECHNICAL ENGINEERING,16(3),1000-1017. |
| MLA | Onyekwena, Chikezie Chimere,et al."Dredged marine soil stabilization using magnesia cement augmented with biochar/slag".JOURNAL OF ROCK MECHANICS AND GEOTECHNICAL ENGINEERING 16.3(2024):1000-1017. |
入库方式： OAI收割
来源：武汉岩土力学研究所
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