Stabilization of iron ore tailing with low-carbon lime/carbide slag-activated ground granulated blast-furnace slag and coal fly ash
文献类型：期刊论文
| 作者 | Jiang, Xiqing3,4; Lang, Lei3; Liu, Shiyu3,5; Mu, Fangyuan3; Wang, Yingfu3; Zhang, Zhaorong3,6; Han, Lijun2,3; Duan, Shuqian1,4; Wang, Ping2,3; Li, Jiangshan2,3 |
| 刊名 | CONSTRUCTION AND BUILDING MATERIALS
 |
| 出版日期 | 2024-01-26 |
| 卷号 | 413页码:12 |
| 关键词 | Iron ore tailing solidification Ground granulated blast-furnace slag Coal fly ash Strength properties Durability |
| ISSN号 | 0950-0618 |
| DOI | 10.1016/j.conbuildmat.2024.134946 |
| 英文摘要 | The massive accumulation of iron ore tailing (IOT) results in land resource wastage and increases the possibility of environmental pollution. In this study, the feasibility of using low-carbon alkali-activated ground granulated blast-furnace slag (lime/Carbide slag (CS)-GGBS) and coal fly ash (CFA) instead of portland cement (PC) for solidifying IOT was investigated. The effects of different binders on strength development and durability of cured IOT were analyzed through unconfined compressive strength (UCS), water stability, and dry-wet cycles tests. Furthermore, the microstructure characteristics of cured IOT were conducted by using scanning electron microscope (SEM) method, X-ray diffraction (XRD) analysis, and thermogravimetric analysis (TGA). The results showed that, using the low-carbon material lime/CS-GGBS to replace about 70% of PC (i.e., PC:lime/CS: GGBS=1:1:1) with 9% binder content, the strength and durability of cured IOT were significantly improved compared with using pure PC. The 28d-UCS of cured IOT was 4.86 MPa, which was twice higher than that with pure PC. The 7d-UCS of cured IOT was 8.22 MPa after 12 dry-wet cycles, which was 2.8 times higher than that with pure PC. Moreover, the water stability coefficient of 27 + 1d-cured IOT was 90%. The micro-analysis showed that, the amount of hydration products (i.e., CSH, CAH and ettringite) in IOT cured with low-carbon materials increased significantly, and the structure became denser, resulting in the increase of strength. This study develops a low-carbon binder instead of pure PC to solidify IOT, and the results can provide a theoretical basis and scientific guidance for the comprehensive utilization of IOT as a filler solid waste. |
| 资助项目 | Development Program of China[2022YFC3901205] ; Natural Science Foundation of China[42107185] |
| WOS研究方向 | Construction & Building Technology ; Engineering ; Materials Science |
| 语种 | 英语 |
| WOS记录号 | WOS:001165537000001 |
| 出版者 | ELSEVIER SCI LTD |
| 源URL | [http://119.78.100.198/handle/2S6PX9GI/40679]  |
| 专题 | 中科院武汉岩土力学所 |
| 通讯作者 | Wang, Ping |
| 作者单位 | 1.Henan Urban Planning Inst & Corp, Zhengzhou 450044, Peoples R China 2.Chinese Acad Sci, HK PolyU Joint Lab Solid Waste Sci, IRSM, Wuhan 430071, Peoples R China 3.Chinese Acad Sci, Inst Rock & Soil Mech, State Key Lab Geomech & Geotech Engn, Wuhan 430071, Peoples R China 4.Zhengzhou Univ, Sch Civil Engn, Zhengzhou 450001, Henan, Peoples R China 5.Wuhan Donghu Univ, Wuhan 430212, Peoples R China 6.Univ Chinese Acad Sci, Beijing 100049, Peoples R China |
| 推荐引用方式 GB/T 7714 | Jiang, Xiqing,Lang, Lei,Liu, Shiyu,et al. Stabilization of iron ore tailing with low-carbon lime/carbide slag-activated ground granulated blast-furnace slag and coal fly ash[J]. CONSTRUCTION AND BUILDING MATERIALS,2024,413:12. |
| APA | Jiang, Xiqing.,Lang, Lei.,Liu, Shiyu.,Mu, Fangyuan.,Wang, Yingfu.,...&Li, Jiangshan.(2024).Stabilization of iron ore tailing with low-carbon lime/carbide slag-activated ground granulated blast-furnace slag and coal fly ash.CONSTRUCTION AND BUILDING MATERIALS,413,12. |
| MLA | Jiang, Xiqing,et al."Stabilization of iron ore tailing with low-carbon lime/carbide slag-activated ground granulated blast-furnace slag and coal fly ash".CONSTRUCTION AND BUILDING MATERIALS 413(2024):12. |
入库方式： OAI收割
来源：武汉岩土力学研究所
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