Influence of alkaline agents with different contents on strength features, energy dissipation and microscopic behavior of cement-based high- sulfur tailings fill
文献类型：期刊论文
| 作者 | He, Qianru3,4; Yilmaz, Erol2; Sun LJ(孙立娟)1 ; Cao, Shuai3,4
|
| 刊名 | POWDER TECHNOLOGY
 |
| 出版日期 | 2024-08-01 |
| 卷号 | 444页码:15 |
| 关键词 | High sulfur tailings Alkaline agents Cemented tailings backfill Strength Microstructure |
| ISSN号 | 0032-5910 |
| DOI | 10.1016/j.powtec.2024.120042 |
| 通讯作者 | Cao, Shuai(sandy_cao@ustb.edu.cn) |
| 英文摘要 | As high-sulfur tails encompass abundant pyrite (FeS2), it is easy to form acidic/leachate waters under the action of water and air, which is opposed to cement-based tail fill (CTF)'s strength development. Therefore, the present investigation improves the mechanical/microstructural behavior of cement-based high-sulfur tailings fill (CHSTF) by adding alkaline agents fly ash (FA) and sodium bicarbonate (SB). Lab findings demonstrated that adding appropriate amounts of FA and SB could significantly increase the UCS value of CHSTF. FA-2%, SB-1% and FS-2% are the best dosage of alkaline agents, and the resultant peak strength is 1.15 MPa, 1.23 MPa and 1.26 MPa. In comparison to None-1: 6, CHSTF's strength increased by 32.18%, 41.26% and 44.41%, respectively. The synergistic effect of FA and SB was significant. On the other hand, the additives not only promoted hydration products' formation, but also increased CHSTF's density and compactness, which significantly enhanced the strength properties and durability of CHSTF. The results could provide new ideas and an experimental basis for the effective treatment and resource reuse of high-sulfur tailings. |
| 分类号 | 二类 |
| WOS关键词 | PASTE BACKFILL ; SULFIDE ; SODIUM |
| 资助项目 | China's National Key R@D Program[2022YFC2905004] |
| WOS研究方向 | Engineering |
| 语种 | 英语 |
| WOS记录号 | WOS:001270685600001 |
| 资助机构 | China's National Key R@D Program |
| 其他责任者 | Cao, Shuai |
| 源URL | [http://dspace.imech.ac.cn/handle/311007/96050]  |
| 专题 | 力学研究所_非线性力学国家重点实验室 |
| 作者单位 | 1.Chinese Acad Sci, State Key Lab Nonlinear Mech, Inst Mech, Beijing 100190, Peoples R China 2.Recep Tayyip Erdogan Univ, Dept Civil Engn, Geotech Div, TR-53100 Rize, Turkiye; 3.Univ Sci & Technol Beijing, Sch Civil & Resource Engn, Beijing 100083, Peoples R China; 4.Univ Sci & Technol Beijing, State Key Lab High Efficient Min & Safety Met Mine, Minist Educ, Beijing 100083, Peoples R China; |
| 推荐引用方式 GB/T 7714 | He, Qianru,Yilmaz, Erol,Sun LJ,et al. Influence of alkaline agents with different contents on strength features, energy dissipation and microscopic behavior of cement-based high- sulfur tailings fill[J]. POWDER TECHNOLOGY,2024,444:15. |
| APA | He, Qianru,Yilmaz, Erol,孙立娟,&Cao, Shuai.(2024).Influence of alkaline agents with different contents on strength features, energy dissipation and microscopic behavior of cement-based high- sulfur tailings fill.POWDER TECHNOLOGY,444,15. |
| MLA | He, Qianru,et al."Influence of alkaline agents with different contents on strength features, energy dissipation and microscopic behavior of cement-based high- sulfur tailings fill".POWDER TECHNOLOGY 444(2024):15. |
入库方式： OAI收割
来源：力学研究所
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