Experimental study on solidification of tailings by MICP under the regulation of organic matrix
文献类型：期刊论文
| 作者 | Zhang, Zhi-jun1,3,4; Tong, Kai-wen2; Hu, Lin1,3; Yu, Qing1,3,4; Wu, Ling-ling1,3,4 |
| 刊名 | CONSTRUCTION AND BUILDING MATERIALS
 |
| 出版日期 | 2020-12-30 |
| 卷号 | 265期号:-页码:11 |
| 关键词 | Organic matrix Grouting reinforcement Calcium carbonate Tailings |
| ISSN号 | 0950-0618 |
| DOI | 10.1016/j.conbuildmat.2020.120303 |
| 英文摘要 | Microbial grouting reinforcement technology can improve the strength of tailings to a certain extent, but there is still much room for improvement. To balance the adverse effects of the technology to cure the tailings, this paper introduced the mineralization technology of soft template into the microbial induced calcium carbonate precipitation (MICP), and carried out the experiments on microbial grouting to strengthen the tailings under the control of organic matrix. The results of aqueous solution test showed that the organic matrix can significantly regulate the structural characteristics of calcium carbonate. When the added organic matrix is egg white protein with a volume fraction of 20%, the contribution to the conversion rate of calcium ions in the reaction solution was the largest, and the concentration of calcium ions in the solution at 20 h is reduced by about 83.72% compared with the control group. In the solidification test of tailings, as the egg white concentration increased, the curing unevenness of the tailings was further aggravated. When the egg white volume fraction is 5%, the strength improvement effect of the tailings was the best and the dilatancy characteristic was the most significant. At the same time, the calcium carbonate produced are mostly large-sized calcite, and the corresponding formation amount, cohesive force and internal friction angle are 16.01%, 131.98 kPa and 42.7 degrees, respectively. The study showed that mineralization technology of soft template can promote the MICP technology, which provides a new method for the reinforcement of tailings dam. (C) 2020 The Author(s). Published by Elsevier Ltd. |
| 资助项目 | National Natural Science Foundation of China, China[51804164] ; National Natural Science Foundation of China, China[51774187] ; Natural Science Foundation of Hunan Province, China[2019JJ50498] ; Natural Science Foundation of Hunan Province, China[2017JJ3274] ; Research Foundation of Education Bureau of Hunan Province, China[18B276] ; Research Foundation of Education Bureau of Hunan Province, China[17A184] |
| WOS研究方向 | Construction & Building Technology ; Engineering ; Materials Science |
| 语种 | 英语 |
| WOS记录号 | WOS:000591202600011 |
| 出版者 | ELSEVIER SCI LTD |
| 源URL | [http://119.78.100.198/handle/2S6PX9GI/25274]  |
| 专题 | 中科院武汉岩土力学所 |
| 作者单位 | 1.Hunan Prov Min Geotech Engn Disaster Predict & Co, Hengyang 421001, Peoples R China 2.Chinese Acad Sci, Inst Rock & Soil Mech, Wuhan 430071, Peoples R China 3.Univ South China, Sch Resource & Environm & Safety Engn, Hengyang 421001, Peoples R China 4.Univ South China, Key Discipline Lab Natl Def Biotechnol Uranium Mi, Hengyang 421001, Peoples R China |
| 推荐引用方式 GB/T 7714 | Zhang, Zhi-jun,Tong, Kai-wen,Hu, Lin,et al. Experimental study on solidification of tailings by MICP under the regulation of organic matrix[J]. CONSTRUCTION AND BUILDING MATERIALS,2020,265(-):11. |
| APA | Zhang, Zhi-jun,Tong, Kai-wen,Hu, Lin,Yu, Qing,&Wu, Ling-ling.(2020).Experimental study on solidification of tailings by MICP under the regulation of organic matrix.CONSTRUCTION AND BUILDING MATERIALS,265(-),11. |
| MLA | Zhang, Zhi-jun,et al."Experimental study on solidification of tailings by MICP under the regulation of organic matrix".CONSTRUCTION AND BUILDING MATERIALS 265.-(2020):11. |
入库方式： OAI收割
来源：武汉岩土力学研究所
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