Investigation on Water Transformation and Pore Structure of Cement-Stabilized Dredged Sediment Based on NMR Technology
文献类型：期刊论文
| 作者 | Wang, Shiquan3; He, Xingxing4; Cai, Guanghua1; Lang, Lei2; Ma, Hongrui3; Gong, Shunmei3; Niu, Zhiyong3 |
| 刊名 | MATERIALS
 |
| 出版日期 | 2022-05-01 |
| 卷号 | 15期号:9页码:- |
| 关键词 | dredged sediment cement-stabilized NMR permeability strength pore structure water transformation |
| 英文摘要 | Cement-stabilized dredged sediment (CDS) when used as a new road construction material cannot only solve the problem of abandoned sediment disposal, but also effectively save natural soil resources. This study aimed to evaluate the strength and permeability of CDS and establish corresponding prediction models from the perspective of a stabilization mechanism. The soil-water composition and pore size distribution were investigated by the nuclear magnetic resonance (NMR) technique. The results demonstrated that more liquid pore water inside the CDS specimen transformed into combined water with cement hydration. The amount of combined water, which essentially characterized the hydration process of cement, presented a linear relationship with log (t). The cementation and filling action of hydrates resulted in the transformation of large pores into smaller ones, hence the optimal pore size decreased with an increasing curing period and cement content. The stress-strain curves and hydraulic conductivity were determined based on unconfined compression and flexible wall penetration tests, respectively. The unconfined compressive strength increased exponentially with the amount of combined water, and the functional correlations of hydraulic conductivity and micropore parameters were established. The reliability of the NMR technique as a new method to study the microscopic evolution mechanism of the strength and permeability of CDS was further verified by scanning electron microscopy and mercury intrusion porosimetry tests. |
| 学科主题 | Chemistry ; Materials Science ; Metallurgy & Metallurgical Engineering ; Physics |
| 语种 | 英语 |
| 出版者 | MDPI |
| WOS记录号 | WOS:000794390700001 |
| 源URL | [http://119.78.100.198/handle/2S6PX9GI/35365]  |
| 专题 | 中科院武汉岩土力学所 |
| 作者单位 | 1.School of Civil Engineering, Nanjing Forestry University, Nanjing 210037, China 2.State Key Laboratory of Geomechanics and Geotechnical Engineering, Institute of Rock and Soil Mechanics, Chinese Academy of Sciences, Wuhan 430071, China 3.National Engineering Research Center of Coal Mine Water Hazard Controlling, School of Resources and Civil Engineering, Suzhou University, Suzhou 234000, China; 4.State Key Laboratory of Hydroscience and Engineering, Tsinghua University, Beijing 100084, China |
| 推荐引用方式 GB/T 7714 | Wang, Shiquan,He, Xingxing,Cai, Guanghua,et al. Investigation on Water Transformation and Pore Structure of Cement-Stabilized Dredged Sediment Based on NMR Technology[J]. MATERIALS,2022,15(9):-. |
| APA | Wang, Shiquan.,He, Xingxing.,Cai, Guanghua.,Lang, Lei.,Ma, Hongrui.,...&Niu, Zhiyong.(2022).Investigation on Water Transformation and Pore Structure of Cement-Stabilized Dredged Sediment Based on NMR Technology.MATERIALS,15(9),-. |
| MLA | Wang, Shiquan,et al."Investigation on Water Transformation and Pore Structure of Cement-Stabilized Dredged Sediment Based on NMR Technology".MATERIALS 15.9(2022):-. |
入库方式： OAI收割
来源：武汉岩土力学研究所
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