THREE-DIMENSIONAL IMAGING OF CEMENT-BASED MATERIALS WITH X-RAY TOMOGRAPHIC MICROSCOPY: VISUALIZATION AND QUANTIFICATION
X-ray computed microtomography is now becoming a popular non-destructive method tostudy the microstructure of materials. As this technique operates on the same basic principleof medical computed tomography (CT) scanners, it provides the three-dimensional (3D)reconstruction of images from finite radiological images; but with much higher spatialresolution. For example, microfocus X-ray CT systems are now being designed to study theinternal microstructure of specimen at spatial resolution of order of several microns.Furthermore, since the development of synchrotron as an X-ray source, advanced X-ray CTsystem is continually improving to approach spatial resolutions to submicron level. Suchhigh-resolution technique is referred in this paper as X-ray tomographic microscopy (XTM)to highlight the distinction of this 3D imaging technique from the relatively well-establishedmethod of 2D microscopic imaging obtained from optical or electron microscope.This paper, therefore, demonstrates the use of XTM technique to investigate themicrostructure of cement-based materials.The potentials for high resolutionmicrotomographic images to understand the 3D microstructure of cement-based materials inrelation to the durability performance of these materials are given. For instance, theapplication of synchrotron microtomography to examine the pore connectivity and tortuosityof the 3D pore space in hardened cement paste is presented. In addition, application ofmicrofocus X-ray CT to characterize the air void system of air-entrained mortar is alsodescribed in this paper.
microstructure X-ray tomographic microscopy porosity tortuosity air void
M.A.B.Promentilla T.Sugiyama K.Shimura
Environmental Material Engineering Laboratory,Division of Built Environment,Graduate School of Engineering,Hokkaido University,Japan
国际会议
南京
英文
1357-1366
2008-10-13（万方平台首次上网日期，不代表论文的发表时间）