Characterization of microstructure evolution of cement paste by micro computed tomography

查看全文 作　　者：[1,2]何永佳;Jason [3]Mote;David A. [3]Lange

机构地区：[1]State Key Laboratory of Silicate Materials for Architectures (Wuhan University of Technology);[2]School of Materials Science and Engineering, Wuhan University of Technology;[3]Department of Civil and Environmental Engineering, University of Illinois at Urbana-Champaign

出　　处：《Journal of Central South University》索引2013年第20卷第4期,共7页

基　　金：Project(2009CB623201) supported by the National Basic Research Program of China;Projects(50902106, 51272193) supported by the National Natural Science Foundation of China;Project(NCET-10-0660) supported by New Century Excellent Talents in Universities of China 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. 关键词：计算机断层扫描水泥净浆组织演变表征粘贴微型水化产物三维图像

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Characterization of microstructure evolution of cement paste by micro computed tomography

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