Coupling effect of cement-stabilization and biopolymer-modification on the mechanical behavior of dredged sediment
文献类型：期刊论文
| 作者 | Lang, Lei1,2; Li, Jiangshan1,2; Huang, Xiao1,2; Wang, Ping1,2; Zhang, Wei1,3 |
| 刊名 | JOURNAL OF ROCK MECHANICS AND GEOTECHNICAL ENGINEERING
 |
| 出版日期 | 2024-08-01 |
| 卷号 | 16期号:8页码:3284-3298 |
| 关键词 | Dredged sediment (DS) Stabilization Biopolymer modification Mechanical properties Micro-mechanism |
| ISSN号 | 1674-7755 |
| DOI | 10.1016/j.jrmge.2023.11.013 |
| 英文摘要 | Nowadays, biopolymer stabilization as a promising eco-friendly approach in soft ground improvement has attracted wide attentions. However, the feasibility of using biopolymer as a green additive of cementstabilized dredged sediment (CDS) with high water content is still unknown. In this study, guar gum (GG) and xanthan gum (XG) were adopted as typical biopolymers, and a series of unconfined compressive strength (UCS), splitting tensile strength (STS) and scanning electron microscopy (SEM) tests were performed to evaluate the mechanical and microstructural properties of XG- and GG-modified CDSs considering several factors including biopolymer modification, binder-soil ratio and water-solid ratio. Furthermore, the micro-mechanisms revealing the evolutions of mechanical properties of biopolymermodified CDS were analyzed. The results indicate that the addition of XG can effectively improve the strength of CDS, while the GG has a side effect. The XG content of 9% was recommended, which can improve the 7 d- and 28 d-UCSs by 196% and 51.8%, together with the 7 d- and 28 d-STSs by 118.3% and 42.2%, respectively. Increasing the binder-soil ratio or decreasing the water-solid ratio significantly improved the strength gaining but aggravated the brittleness characteristics of CDS. Adding XG to CDS contributed to the formation of microstructure with more compactness and higher cementation degrees of ordinary Portland cement (OPC)-XG-stabilized DS (CXDS). The micro-mechanism models revealing the interactions of multiple media including OPC cementation, biopolymer film bonding and bridging effects inside CXDS were proposed. The key findings confirm the feasibility of XG modification as a green and high-efficiency mean for improving the mechanical properties of CDS. (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 | National Key R&D Program of China[2020YFC1908703] ; Funds for International Cooperation and Exchange of the National Natural Science Foun-dation of China[51861165104] ; China Postdoctoral Science Foundation[2022M723347] |
| WOS研究方向 | Engineering |
| 语种 | 英语 |
| WOS记录号 | WOS:001297891900001 |
| 出版者 | SCIENCE PRESS |
| 源URL | [http://119.78.100.198/handle/2S6PX9GI/42296]  |
| 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.Hubei Prov Key Lab Contaminated Sludge & Soil Sci, Wuhan 430071, Peoples R China 3.Univ Chinese Acad Sci, Beijing 100049, Peoples R China |
| 推荐引用方式 GB/T 7714 | Lang, Lei,Li, Jiangshan,Huang, Xiao,et al. Coupling effect of cement-stabilization and biopolymer-modification on the mechanical behavior of dredged sediment[J]. JOURNAL OF ROCK MECHANICS AND GEOTECHNICAL ENGINEERING,2024,16(8):3284-3298. |
| APA | Lang, Lei,Li, Jiangshan,Huang, Xiao,Wang, Ping,&Zhang, Wei.(2024).Coupling effect of cement-stabilization and biopolymer-modification on the mechanical behavior of dredged sediment.JOURNAL OF ROCK MECHANICS AND GEOTECHNICAL ENGINEERING,16(8),3284-3298. |
| MLA | Lang, Lei,et al."Coupling effect of cement-stabilization and biopolymer-modification on the mechanical behavior of dredged sediment".JOURNAL OF ROCK MECHANICS AND GEOTECHNICAL ENGINEERING 16.8(2024):3284-3298. |
入库方式： OAI收割
来源：武汉岩土力学研究所
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