High-efficiency stabilization of dredged sediment using nano-modified and chemical-activated binary cement
文献类型：期刊论文
| 作者 | Lang, Lei1,2; Chen, Bing2; Li, Jiangshan1 |
| 刊名 | JOURNAL OF ROCK MECHANICS AND GEOTECHNICAL ENGINEERING
 |
| 出版日期 | 2023-08-01 |
| 卷号 | 15期号:8页码:2117-2131 |
| 关键词 | Dredged sediment (DS) Stabilization Chemical-activation Nano-modification Microstructure |
| ISSN号 | 1674-7755 |
| DOI | 10.1016/j.jrmge.2022.12.007 |
| 英文摘要 | High-efficiency disposal of dredged sediment (DS) has become an imperative geo-environmental engineering issue due to the limited landfilling space and severe environmental burdens. This study firstly developed a novel high-efficiency nano-modified and chemical-activated binary cement (NBC), which was composed of binary cement (BC) consisting ordinary Portland cement (OPC) and ground granulated blast-furnace slag (GGBS), chemical-activator and nano-modifier. The effects of chemical-activation and nano-modification on the strength development of BC-stabilized DS (BCDS), and the optimum mix of NBC were respectively achieved via a series of unconfined compressive strength and orthogonal tests. Then, the high-efficiency and economic applicability of NBC in DS stabilization were evaluated by comparing with OPC. Furthermore, the microstructure and mineral composition evolutions inside NBC-stabilized DS (NDS) were explored by conducting X-ray diffraction (XRD) and scanning electron microscopy (SEM) tests. The results show that both chemical-activation and nano-modification could effectively improve the strength gain of BCDS, and compared with single chemical-activator and nano-modifier, the composite chemical-activators and nano-modifiers exhibited better performances. Based on BC with OPC/GGBS mass ratio of 1:1, both anhydrous sodium metasilicate/anhydrous sodium sulfate (SM/SS) and nano-SiO2/nano-MgO (NS/NM) with mass ratio of 1:9 were respectively determined to be optimum chemical-activator and nano-modifier. The optimum mass ratio of BC, SM/SS and NS/NM was 20:2:1, i.e. the optimum mix of NBC. Compared with OPC, NBC exhibited higher stabilization efficiency and better economic applicability. The generation of calcium silicate hydrate (CSH), calcium aluminate hydrate (CAH) and ettringite contributed to the formation of dense cemented soil matrix inside NDS, and a conceptual micro-mechanism model characterizing the strength development under the coupling action of chemical-activation and nano-modification was proposed. (C) 2023 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 | National Key R&D Program of China[2020YFC1908703] ; Funds for International Cooperation and Exchange of the National Natural Science Foundation of China[51861165104] ; Major Science and Technology Project of Inner Mongolia Autonomous Region, China[2021ZD0007-02-01] |
| WOS研究方向 | Engineering |
| 语种 | 英语 |
| WOS记录号 | WOS:001070903400016 |
| 出版者 | SCIENCE PRESS |
| 源URL | [http://119.78.100.198/handle/2S6PX9GI/39564]  |
| 专题 | 中科院武汉岩土力学所 |
| 通讯作者 | Li, Jiangshan |
| 作者单位 | 1.Chinese Acad Sci, Inst Rock & Soil Mech, State Key Lab Geomech & Geotech Engn, Wuhan 430071, Peoples R China 2.Shanghai Jiao Tong Univ, Dept Civil Engn, Shanghai 200240, Peoples R China |
| 推荐引用方式 GB/T 7714 | Lang, Lei,Chen, Bing,Li, Jiangshan. High-efficiency stabilization of dredged sediment using nano-modified and chemical-activated binary cement[J]. JOURNAL OF ROCK MECHANICS AND GEOTECHNICAL ENGINEERING,2023,15(8):2117-2131. |
| APA | Lang, Lei,Chen, Bing,&Li, Jiangshan.(2023).High-efficiency stabilization of dredged sediment using nano-modified and chemical-activated binary cement.JOURNAL OF ROCK MECHANICS AND GEOTECHNICAL ENGINEERING,15(8),2117-2131. |
| MLA | Lang, Lei,et al."High-efficiency stabilization of dredged sediment using nano-modified and chemical-activated binary cement".JOURNAL OF ROCK MECHANICS AND GEOTECHNICAL ENGINEERING 15.8(2023):2117-2131. |
入库方式： OAI收割
来源：武汉岩土力学研究所
浏览0
下载0
收藏0
其他版本
除非特别说明，本系统中所有内容都受版权保护，并保留所有权利。