Mechanical and Hydration Characteristics of Stabilized Gold Mine Tailings Using a Sustainable Industrial Waste-Based Binder
文献类型：期刊论文
| 作者 | Pan, Zhenkai2,3; Hu, Shaohua2; Zhang, Chao3,4; Zhou, Tong1; Hua, Guowei2; Li, Yuan3; Lv, Xiaolin1 |
| 刊名 | MATERIALS
 |
| 出版日期 | 2023 |
| 卷号 | 16期号:2页码:- |
| 关键词 | gold mine tailings industrial waste binder hydration mechanism triaxial compressive strength |
| 英文摘要 | Sustainable resource utilization of tailings is a long-term challenge. Therefore, a novel waste-based binder is proposed in this study to stabilize/solidify gold mine tailings (GMTs). This binder is composed of fly ash (FA), ground blast furnace slag (GBFS), and metakaolin (MK) activated with mixed calcium carbide residue (CCR) as well as pure reagent grade chemical, sodium hydroxide (SH, NaOH), and plaster gypsum (PG, CaSO4 center dot 2H(2)O). The mechanical properties and hydration of stabilized tailings with curing period were investigated. Tests included triaxial compression test and nitrogen adsorption to evaluate the strength of the stabilized tailings and microstructure. The results show that the addition of the waste-based binder yields significant improvement in shear strength. Strain softening occurred for all cured samples, and a local shear band can be observed in all failed stabilized samples. Based on the relationship between strength and curing period, it can be speculated that the hydration reaction of the sample ends after around 40 days of curing. A bimodal pore-size distribution was observed in all solidified/stabilized samples. FTIR and Al-27 MAS-NMR were used to analyze hydration products. The strength improvement of stabilized tailings was mainly attributed to the formation of ettringite and C-S-H gels after various polymerization reactions. These new hydrates bind tailings particles and fill the pores to form a more stable structure, which supplied superior mechanical properties. This paper can provide a theoretical basis for exploring the application of the industrial waste-based binder to modify the mechanical properties of gold tailings. |
| 学科主题 | Chemistry ; Materials Science ; Metallurgy & Metallurgical Engineering ; Physics |
| 语种 | 英语 |
| WOS记录号 | WOS:000927743600001 |
| 出版者 | MDPI |
| 源URL | [http://119.78.100.198/handle/2S6PX9GI/35044]  |
| 专题 | 中科院武汉岩土力学所 |
| 作者单位 | 1.Wushan Copper Mine, Jiangxi Copper Corporation Limited, Ruichang 332204, China 2.School of Safety Science and Emergency Management, Wuhan University of Technology, Wuhan 430070, China 3.State Key Laboratory of Geotechnical Mechanics and Geotechnical Engineering, Institute of Rock and Soil Mechanics, Chinese Academy of Sciences, Wuhan 430071, China 4.Key Laboratory of Mine Slope Safety Risk Warning and Disaster Prevention and Mitigation, Ministry of Emergency Management, Wuhan 430071, China |
| 推荐引用方式 GB/T 7714 | Pan, Zhenkai,Hu, Shaohua,Zhang, Chao,et al. Mechanical and Hydration Characteristics of Stabilized Gold Mine Tailings Using a Sustainable Industrial Waste-Based Binder[J]. MATERIALS,2023,16(2):-. |
| APA | Pan, Zhenkai.,Hu, Shaohua.,Zhang, Chao.,Zhou, Tong.,Hua, Guowei.,...&Lv, Xiaolin.(2023).Mechanical and Hydration Characteristics of Stabilized Gold Mine Tailings Using a Sustainable Industrial Waste-Based Binder.MATERIALS,16(2),-. |
| MLA | Pan, Zhenkai,et al."Mechanical and Hydration Characteristics of Stabilized Gold Mine Tailings Using a Sustainable Industrial Waste-Based Binder".MATERIALS 16.2(2023):-. |
入库方式： OAI收割
来源：武汉岩土力学研究所
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