Improvement in water resistance of magnesium oxychloride cement via incorporation of dredged sediment
文献类型：期刊论文
| 作者 | Xu, Wenhao1; Song, Zijian1,2; Guo, Ming-Zhi1,3; Jiang, Linhua1; Chu, Hongqiang1 |
| 刊名 | JOURNAL OF CLEANER PRODUCTION
 |
| 出版日期 | 2022-07-01 |
| 卷号 | 356期号:-页码:- |
| ISSN号 | 0959-6526 |
| 关键词 | Dredged sediment Magnesium oxychloride cement Water resistance Solid waste |
| 英文摘要 | Dredged sediment (DS) derived from dredging operations poses a potential threat to the ecological environment. The proper disposal and utilization of DS remains a challenge. In this study, magnesium oxychloride cement (MOC) was adopted as a sustainable carrier for effective recycling of DS. MOC pastes incorporated with DS or calcined dredged sediment (CDS) were subjected to multiscale characterization techniques to investigate the feasibility of combining MOC with DS. DS/CDS were found to enhance the water resistance of the MOC pastes despite the negative influence of dilution on their mechanical properties. Strength retention tests revealed that the compressive strength retention rate of MOC pastes blended with 10%-40% DS positively correlated with the DS content, and the modification induced by DS was superior to that by CDS. Multiple microscopic approaches were adopted to mechanistically elucidate the modification of MOC by DS/CDS. The results revealed that the addition of DS increased the porosity of the modified MOC pastes, thereby providing more channels for water intrusion. Interestingly, the improvement in the water resistance of the MOC paste was sustained with increasing DS content. Insoluble gel-like phases were observed throughout the MOC substrate and acicular phase 5 crystals, which impeded the intrusion of water and consequently improved the water resistance of the MOC pastes. Thermogravimetric and energy-spectrum analyses confirmed that the insoluble phases were composed of an amorphous Mg-Al-Si-Cl-H gel. The development of this MOC paste demonstrates a promising strategy for improving the water resistance of MOC products and alleviating the burden of DS on the environment. |
| 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:000800475900001 |
| 源URL | [http://119.78.100.198/handle/2S6PX9GI/35128]  |
| 专题 | 中科院武汉岩土力学所 |
| 作者单位 | 1.College of Mechanics and Materials, Hohai University, Nanjing, 211100, China 2.Key Laboratory of Construction and Safety of Water Engineering of the Ministry of Water Resources, China Institute of Water Resources and Hydropower Research, Beijing, 100038, China 3.State Key Laboratory of Geomechanics and Geotechnical Engineering, Institute of Rock and Soil Mechanics, Chinese Academy of Sciences, Wuhan, 430071, China |
| 推荐引用方式 GB/T 7714 | Xu, Wenhao,Song, Zijian,Guo, Ming-Zhi,et al. Improvement in water resistance of magnesium oxychloride cement via incorporation of dredged sediment[J]. JOURNAL OF CLEANER PRODUCTION,2022,356(-):-. |
| APA | Xu, Wenhao,Song, Zijian,Guo, Ming-Zhi,Jiang, Linhua,&Chu, Hongqiang.(2022).Improvement in water resistance of magnesium oxychloride cement via incorporation of dredged sediment.JOURNAL OF CLEANER PRODUCTION,356(-),-. |
| MLA | Xu, Wenhao,et al."Improvement in water resistance of magnesium oxychloride cement via incorporation of dredged sediment".JOURNAL OF CLEANER PRODUCTION 356.-(2022):-. |
入库方式： OAI收割
来源：武汉岩土力学研究所
浏览0
下载0
收藏0
其他版本
除非特别说明，本系统中所有内容都受版权保护，并保留所有权利。