Characterization of microstructure evolution of cement paste by micro computed tomography

被引：6
作者：
He Yong-jia [1 ,2 ]
Mote, Jason [3 ]
Lange, David A. [3 ]
机构：
[1] Wuhan Univ Technol, State Key Lab Silicate Mat Architectures, Wuhan 430070, Peoples R China
[2] Wuhan Univ Technol, Sch Mat Sci & Engn, Wuhan 430070, Peoples R China
[3] Univ Illinois, Dept Civil & Environm Engn, Urbana, IL 61801 USA
来源：
JOURNAL OF CENTRAL SOUTH UNIVERSITY | 2013年 / 20卷 / 04期
基金：
美国国家科学基金会; 中国国家自然科学基金;
关键词：
Micro computed tomography (Micro-CT); 3D image; microstructure; cement paste; PORE STRUCTURE; HYDRATION; CONCRETE;
D O I：
10.1007/s11771-013-1592-x
中图分类号：
TF [冶金工业];
学科分类号：
0806 ;
摘要：
Micro computed tomography (Micro-CT) was applied to obtain three-dimensional images of the microstructure of cement paste (water-to-cement mass ratio of 0.5) at different ages. By using the Amira software, component phases of the cement paste such as pores, hydration products, and unhydrated clinker particles were segmented from each other based on their 3D image grey levels; their relative contents were also calculated with the software, and the data are 61.2%, 0% and 38.8% at the beginning of hydration and 11.8%, 78.5% and 9.7% at 28 d age, respectively. The hydration degree of cement paste at different ages was compared with the experimental data acquired by loss on ignition (LOI) tests. The results show that the calculated and measured data reasonably agree with each other, which indicates that micro-CT is a useful and reliable approach to characterize the micro structure evolution of hydrating cement paste.
引用
收藏
页码：1115 / 1121
页数：7
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