Multisolid waste collaborative production of aeolian sand-red mud-fly ash cemented paste backfill
文献类型：期刊论文
| 作者 | Tang, Ren-long2,3; Zhao, Bing-Chao2,3,5; Xin, Jie4,5; Sun, Jian-peng2; Xu, Bao-wa2; Tian, Chuang2; Ning, Jian-bo2; Li, Long-qing2,3; Shao, Xiao-ping2,3; Ren, Wu-ang1 |
| 刊名 | CASE STUDIES IN CONSTRUCTION MATERIALS
 |
| 出版日期 | 2024-07-01 |
| 卷号 | 20页码:20 |
| 关键词 | Backfill Red mud Rheological properties Compressive strength Microstructure Leaching |
| ISSN号 | 2214-5095 |
| DOI | 10.1016/j.cscm.2023.e02843 |
| 英文摘要 | This study proposed the novel idea of anaolian sand -red mud -fly ash cemented paste backfill (ARFCPB) to realize low -carbon backfill mining. This idea realizes large-scale disposal and resource utilization of red mud (RM) and fly ash (FA) solid wastes. The influence of the FA/RM mass ratio and mass concentration on the mechanism of action of ARFCPB was explored through comprehensive rheological performance, mechanical property, microscopic, and leaching toxicity tests. The results showed that the fresh ARFCPB slurry could be described by the Herschel-Bulkley model (R2 >= 0.964). As the FA/RM mass ratio increased, the ARFCPB slurry yield stress decreased, the thixotropy decreased, and the slump increased. This is because RM has a large specific surface area and an unsmooth surface, resulting in greater water absorption by RM than by FA. In addition, the uniaxial compressive strength (UCS) of ARFCPB can meet the needs of backfill mining with higher strength requirements. UCS first increases and then decreases with increasing FA/RM mass ratio, which is optimal when the mass ratio of FA to RM is 4. When the FA/RM mass ratio was 4, the UCSs of specimens A4 and B4 with mass concentrations of 78% and 80%, respectively, were 5.6 MPa and 6.4 MPa after 28 days of curing. The leaching results of heavy metal ions in group B4 meet the Class III groundwater standards and can be used for centralized drinking water sources and industrial and agricultural water. Considering the fluidity characteristics, mechanical properties, and leaching results, B4 was identified as the optimal formulation. Finally, the microstructure of the ARFCPB was studied using ultrasonic pulse velocity (UPV) and SEM. The results can contribute to clean production in the aluminum production industry, coal-fired power plants, and coal mines. |
| 资助项目 | Natural Science Basic Research Project of Shaanxi Province[2023-JC-QN-0399] ; National Natural Science Foundation of China[52074208] ; Key R & D plan of Shaanxi Province in 2023[2023-LL-QY-02] |
| WOS研究方向 | Construction & Building Technology ; Engineering ; Materials Science |
| 语种 | 英语 |
| WOS记录号 | WOS:001153677000001 |
| 出版者 | ELSEVIER |
| 源URL | [http://119.78.100.198/handle/2S6PX9GI/40528]  |
| 专题 | 中科院武汉岩土力学所 |
| 通讯作者 | Zhao, Bing-Chao; Xin, Jie |
| 作者单位 | 1.Xian Univ Sci & Technol, Sch Architecture & Civil Engn, Xian 710054, Peoples R China 2.Xian Univ Sci & Technol, Energy Sch, Xian 710054, Peoples R China 3.Minist Educ China, Key Lab Western Mines & Hazards Prevent, Xian 710054, Peoples R China 4.Chinese Acad Sci, Inst Rock & Soil Mech, State Key Lab Geomech & Geotech Engn, Wuhan 430071, Peoples R China 5.Xian Univ Sci & Technol, Energy Sch, Xian 710054, Peoples R China |
| 推荐引用方式 GB/T 7714 | Tang, Ren-long,Zhao, Bing-Chao,Xin, Jie,et al. Multisolid waste collaborative production of aeolian sand-red mud-fly ash cemented paste backfill[J]. CASE STUDIES IN CONSTRUCTION MATERIALS,2024,20:20. |
| APA | Tang, Ren-long.,Zhao, Bing-Chao.,Xin, Jie.,Sun, Jian-peng.,Xu, Bao-wa.,...&Ren, Wu-ang.(2024).Multisolid waste collaborative production of aeolian sand-red mud-fly ash cemented paste backfill.CASE STUDIES IN CONSTRUCTION MATERIALS,20,20. |
| MLA | Tang, Ren-long,et al."Multisolid waste collaborative production of aeolian sand-red mud-fly ash cemented paste backfill".CASE STUDIES IN CONSTRUCTION MATERIALS 20(2024):20. |
入库方式： OAI收割
来源：武汉岩土力学研究所
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