A preliminary investigation on microstructural characteristics of interfacial zone between cement and exploded wood fiber strand by using SEM-EDS [scanning electron microscopy - energy dispersive X-ray spectroscopy]

The hydration behavior and strength performance of cement mixed with exploded wood fiber strand (WFS) obtained by the water-vapor explosion process have been studied previously. In the current study, the micro-structural characteristics of cement-exploded WFS inter-facial zone were examined using sc...

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Bibliographic Details
Published in:Journal of wood science 2004-08, Vol.50 (4), p.327-336
Main Authors: Wei, Y.M. (Tsukuba Univ., Ibaraki (Japan). Inst. of Agricultural and Forest Engineering), Fujii, T, Hiramatsu, Y, Miyatake, A, Yoshinaga, S, Tomita, B
Format: Article
Language:English
Subjects:
CALCIUM
CEMENT
Cement paste
COMPOSITE BOARD
Composition
CRYPTOMERIA JAPONICA
Energy dispersive X ray spectroscopy
HYDRATION
Mechanical properties
MICROSCOPY
Morphology
Scanning electron microscopy
SILICON
Wood fibers
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Summary:The hydration behavior and strength performance of cement mixed with exploded wood fiber strand (WFS) obtained by the water-vapor explosion process have been studied previously. In the current study, the micro-structural characteristics of cement-exploded WFS inter-facial zone were examined using scanning electron microscopy with energy-dispersive X-ray spectroscopy (SEM-EDS). The Ca/Si ratios at the interfacial zones and the elemental compositions of hydration products deposited in the tracheid lumen were investigated. In addition, the morphological differences and compositional variations of hydration products that developed on the wood surfaces were examined. The results revealed that the Ca/Si ratios at the interfacial zones were strongly influenced by the mixture compositions, and that the elemental compositions of the hydration products that filled the tracheid lumen were significantly different from those of the cement paste in the mixtures. Differences in morphology and composition of hydration products at the wood surfaces were also observed to correspond to the different mixture compositions. These characteristics are considered to be directly related to the bond property, and thus, to the mechanical performance of WCM.
ISSN:1435-0211
1611-4663
DOI:10.1007/s10086-003-0576-0