[1]董必钦,郭邦文,刘昱清,等.水泥净浆水分传输过程可视化表征与定量分析[J].深圳大学学报理工版,2018,35(3):285-291.[doi:10.3724/SP.J.1249.2018.03285]
　DONG Biqin,GUO Bangwen,LIU Yuqing,et al.Visualization and quantitative analysis of water transport evolution in cementitious materials[J].Journal of Shenzhen University Science and Engineering,2018,35(3):285-291.[doi:10.3724/SP.J.1249.2018.03285]
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水泥净浆水分传输过程可视化表征与定量分析()
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《深圳大学学报理工版》[ISSN:1000-2618/CN:44-1401/N]

卷:
第35卷
期数:
2018年第3期
页码:
285-291
栏目:
材料科学
出版日期:
2018-05-15

文章信息/Info

Title:
Visualization and quantitative analysis of water transport evolution in cementitious materials
文章编号:
201803007
作者:
董必钦; 郭邦文; 刘昱清; 姚婉琼; 洪舒贤; 邢锋
深圳大学土木工程学院，广东省滨海土木工程耐久性重点实验室，广东深圳518060
Author(s):
DONG Biqin;  GUO Bangwen;  LIU Yuqing;  YAO Wanqiong;  HONG Shuxian;  and XING Feng
College of Civil Engineering, Guangdong Province Key Laboratory of Durability for Marine Civil Engineering, Shenzhen University, Shenzhen 518060, Guangdong Province, P.R.China
关键词:
建筑材料; 水泥基材料; 水分传输; X射线断层扫描; 吸水深度; Lucas-Washburn 方程
Keywords:
building materials;  cementitious materials;  water transport;  X-ray computed tomography microscope;  absorption depth;  Lucas-Washburn equation
分类号:
TU 501
DOI:
10.3724/SP.J.1249.2018.03285
文献标志码:
A
摘要:
有害离子通过水为媒介在水泥基材料内部传输，引起钢筋混凝土的劣化发展，缩短了混凝土结构的服役年限. 为研究水泥基材料因水分传输引起的劣化机理，基于X射线断层扫描技术，采用碘化钠溶液作为图像增强剂，对水分在水泥净浆内部的传输过程进行原位和无损可视化追踪，分析水在水泥基体的吸水渗透深度变化. 研究表明，当采用质量分数为10%的碘化钠溶液时，X射线断层扫描技术可清晰表征水分在净浆中的二维和三维传输过程；通过X射线断层扫描技术测定的吸水深度与时间平方根呈线性关系，符合Locas-Washburn方程.
Abstract:
Harmful ions transport inside the concrete by the medium of water, causing the deterioration of concrete and the steel-bar corrosion development and shortening the service life of concrete. In order to study the degradation mechanism of cement-based material due to water transportation, this study in-situ traces the water transport process in cement paste non-destructively and quantitatively analyzes the relationship between water uptake depth and absorption time by means of X-ray computed tomography microscope (X-ray μCT) combined with NaI enhancing. The results show that the 2D and 3D evolution of water transport in cement paste could be clearly characterized by X-ray μCT method with mass fraction of 10% NaI solution. What’s more, the absorption depth measured by X-ray μCT is linear with the square root of time, which is consistent with Locas-Washburn equation.

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备注/Memo

备注/Memo:
Received：2017-10-31；Accepted：2018-03-01
Foundation：National Natural Science Foundation of China (51538007,51478270,51378239)
Corresponding author：Professor DONG Biqin．E-mail: incise@szu.edu.cn
Citation：DONG Biqin, GUO Bangwen, LIU Yuqing, et al. Visualization and quantitative analysis of water transport evolution in cementitious materials ［J］. Journal of Shenzhen University Science and Engineering, 2018, 35(3): 285-291.（in Chinese）
基金项目：国家自然科学基金资助项目（51538007，51478270，51378239）
作者简介：董必钦(1975—)，男，深圳大学教授．研究方向：水泥基材料．E-mail：incise@email.szu.edu.cn
引文：董必钦，郭邦文，刘昱清，等．水泥净浆水分传输过程可视化表征与定量分析［J］. 深圳大学学报理工版，2018，35(3)：285-291.
更新日期/Last Update: 2018-04-28