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浙江大学学报(工学版)
浙江大学学报(工学版)  2026, Vol. 60 Issue (6): 1139-1147    DOI: 10.3785/j.issn.1008-973X.2026.06.001
土木工程、交通工程     
基于同步辐射CT的黏土岩孔隙结构与干燥行为
刘奎1(),WEITKAMPTimm2,张全昌3,胡静4,*()
1. 山东科技大学 土木工程与建筑学院，山东 青岛 266590
2. SOLEIL 同步加速器实验中心，法国 圣奥宾 91160
3. 青岛中科坤泰装配建筑科技有限公司，山东 青岛 266000
4. 福州大学 土木工程学院，福建 福州 350025
Pore structure and drying behavior of argillite material based on synchrotron CT imaging
Kui LIU1(),Timm WEITKAMP2,Quanchang ZHANG3,Jing HU4,*()
1. College of Civil Engineering and Architecture, Shandong University of Science and Technology, Qingdao 266590, China
2. Synchrotron Soleil, St Aubin 91160, France
3. Qingdao ZhongKe KunTai Precast Construction Technology Limited Company, Qingdao 266000, China
4. Department of Civil Engineering, Fuzhou University, Fuzhou 350025, China
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摘要：

为了评估黏土岩作为高放废物地质处置库屏障材料的长期性能，采用同步辐射X射线计算机断层扫描技术，以亚微米分辨率表征Toarcian黏土岩在3.3、9.0与21.8 MPa吸力下的孔隙结构演化与干燥行为. 结果表明，随着吸力的增大，岩样孔隙率呈现单调递减的规律. 轴向约束条件诱导了显著的体积收缩与非均匀孔隙闭合. 非约束试样的宏观孔隙率变化甚微，且变形主要由局部宏观裂缝主导，低吸力下在试样边缘裂缝更发育. CT成像揭示了岩样整体呈现均匀干燥的模式，孔隙率的径向分布一致，证明孔隙系统主要由亚微米尺度孔隙构成（CT可探测到的孔隙率仅为样本实际孔隙率的10%~17%）.
关键词： 黏土岩;  同步辐射CT;  孔隙结构;  干燥行为;  放射性废物处置    
Abstract:

Synchrotron-based X-ray computed tomography was employed to characterize the evolution of pore structure and drying behavior in Toarcian argillite under suction levels of 3.3, 9.0 and 21.8 MPa at submicron resolution in order to evaluate the long-term performance of argillite as a geological barrier material in high-level radioactive waste disposal. Results showed that the porosity of the argillite decreased monotonically with increasing suction. Axial confinement induced significant volumetric shrinkage and heterogeneous pore closure. Unconfined specimens exhibited minimal change in macroscopic porosity, with deformation primarily governed by the development of local macro-fracture, especially near the specimen boundary under low suction. CT imaging revealed a uniform drying pattern throughout the specimen, with consistent radial porosity distribution, and confirmed that the pore system was predominantly composed of submicron-scale pore (CT-detected porosity was only 10%-17% of the total porosity).
Key words: argillite    synchrotron CT imaging    pore structure    drying behavior    radioactive waste disposal
收稿日期: 2025-10-11 出版日期: 2026-05-06
CLC:  TU 411  
基金资助: 国家自然科学基金资助项目（52508391, 52578516）；山东省优秀青年基金资助项目（2025HWYQ-052）；山东省自然科学基金资助项目（ZR2024QE331）.
通讯作者: 胡静     E-mail: kui.liu@sdust.edu.cn;jingh@fzu.edu.cn
作者简介: 刘奎（1990—），男，讲师，从事环境岩土及能源土工的研究. orcid.org/0000-0002-7533-1272. E-mail：kui.liu@sdust.edu.cn
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引用本文:

刘奎,WEITKAMPTimm,张全昌,胡静. 基于同步辐射CT的黏土岩孔隙结构与干燥行为[J]. 浙江大学学报(工学版), 2026, 60(6): 1139-1147.

Kui LIU,Timm WEITKAMP,Quanchang ZHANG,Jing HU. Pore structure and drying behavior of argillite material based on synchrotron CT imaging. Journal of ZheJiang University (Engineering Science), 2026, 60(6): 1139-1147.

链接本文:

https://www.zjujournals.com/eng/CN/10.3785/j.issn.1008-973X.2026.06.001    或    https://www.zjujournals.com/eng/CN/Y2026/V60/I6/1139

图 1  取样地点及配制
矿物成分wB/%dp/mm
伊利石111.0~2.0
伊利石/蒙脱石302.0~3.0
高岭石100.1~1
碳酸盐150.1~10
石英1610~1000
钾长石410~500
绿泥石41~10
黄铁矿硫化物20.1~10
表 1  主要矿物成分占比及粒径
溶液（室温）ρ/(g·mL?1)pc/MPa
LiCl13.0261.5
K2CO31.1113.2
Mg (NO3)23.7582.4
NaCl0.3637.8
(NH4)2SO40.7524.9
KNO30.389.0
表 2  饱和状态下的盐溶液
图 2  不同吸力下的物理性质
图 3  Toarcian黏土岩的土水特征曲线
图 4  白光模式下的ANATOMIX光束线
图 5  Paganin滤波器效果的示意图
图 6  TWS示例图像
图 7  3.3 MPa吸力下的样本局部扫描图像
图 8  不同吸力下的孔隙率径向分布
图 9  孔隙率轴向分布及裂缝
图 10  不同吸力和位置的孔径分布
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