Utilization of flue gas desulfurization gypsum to produce green binder for dredged soil solidification: Strength, durability, and planting performance
文献类型：期刊论文
| 作者 | Wan, Yong2,3; Hui, Xinminnan3,4; He, Xingxing1,3; Xue, Jianfei5; Feng, Dianzhi5; Chen, Zhixiang3; Li, Jiangshan2,3; Liu, Lei2,3; Xue, Qiang2,3
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| 刊名 | JOURNAL OF CLEANER PRODUCTION
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| 出版日期 | 2022-09-20 |
| 卷号 | 367期号:-页码:- |
| ISSN号 | 0959-6526 |
| 关键词 | Dredged soil solidification Flue gas desulfurization gypsum Strength properties Dry-wet cycles test Planting performance Microstructure |
| 英文摘要 | The massive deposition of sediment in the Yellow River leads to the waste of land resources and is also prone to environmental disasters. In this study, the industrial by-product, flue gas desulfurization gypsum (FGDG), was incorporated with Portland cement (PC) and fly ash (FA) to treat the dredged soil (DS) from the Yellow River. The effects of initial water content of DS (w(0)), binder content (A(w)), and the FGDG content in binder on the strength development and durability of solidified dredged soil (SDS) were analyzed via a series of UCS, pH value, and dry-wet cycles tests. Additionally, the planting performance of SDS was evaluated by planting wheat grass, and the microstructure characteristics were conducted by X-ray diffraction (XRD) analysis, thermogravimetric (TG) analysis, and scanning electron microscope (SEM) method. The results indicate that, when the binder containing 50% FGDG, the SDS sample has good strength and resistance to dry-wet cycles, and decreasing w0, increasing Aw, or reducing the FGDG content in binder can obviously improve the strength and durability of SDS. Furthermore, increasing the FGDG content in binder is more beneficial to germination and growth of plants. The micro-analysis shows that, during the dry-wet cycles test, the amount of hydration products (i.e., C-S-H and AFt) in SDS increased significantly, and the structure became denser, resulting in the increase of strength. During planting, the pH of SDS decreased rapidly to about 8.5, mainly because the root respiration accelerated the carbonization of Ca(OH)(2) crystals in sample. |
| 学科主题 | Science & Technology - Other Topics ; Engineering ; Environmental Sciences & Ecology |
| 语种 | 英语 |
| 出版者 | ELSEVIER SCI LTD |
| WOS记录号 | WOS:000830827600002 |
| 源URL | [http://119.78.100.198/handle/2S6PX9GI/35463]  |
| 专题 | 中科院武汉岩土力学所 |
| 作者单位 | 1.State Key Laboratory of Hydroscience and Engineering, Tsinghua University, Beijing, 100084, China 2.IRSM-CAS/HK PolyU Joint Laboratory on Solid Waste Science, Wuhan, 430071, China 3.State Key Laboratory of Geomechanics and Geotechnical Engineering, Institute of Rock and Soil Mechanics, Chinese Academy of Sciences, Wuhan, 430071, China 4.University of Chinese Academy of Sciences, Beijing, 100049, China 5.School of Mechanics & Engineering, Liaoning Technical University, Fuxin, 123000, Liaoning Province, China |
| 推荐引用方式 GB/T 7714 | Wan, Yong,Hui, Xinminnan,He, Xingxing,et al. Utilization of flue gas desulfurization gypsum to produce green binder for dredged soil solidification: Strength, durability, and planting performance[J]. JOURNAL OF CLEANER PRODUCTION,2022,367(-):-. |
| APA | Wan, Yong.,Hui, Xinminnan.,He, Xingxing.,Xue, Jianfei.,Feng, Dianzhi.,...&Xue, Qiang.(2022).Utilization of flue gas desulfurization gypsum to produce green binder for dredged soil solidification: Strength, durability, and planting performance.JOURNAL OF CLEANER PRODUCTION,367(-),-. |
| MLA | Wan, Yong,et al."Utilization of flue gas desulfurization gypsum to produce green binder for dredged soil solidification: Strength, durability, and planting performance".JOURNAL OF CLEANER PRODUCTION 367.-(2022):-. |
入库方式： OAI收割
来源：武汉岩土力学研究所
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