Quantification of tortuosity in hardened cement pastes using synchrotron-based X-ray computed microtomography

Promentilla, Michael Angelo B.; Sugiyama, T.; Hitomi, T.; Takeda, N.

Quantification of tortuosity in hardened cement pastes using synchrotron-based X-ray computed microtomography

Promentilla, Michael Angelo B.; Sugiyama, T.; Hitomi, T. et al.

Cement and Concrete Research, 2009, 39(6), 548-557

Permalink : https://hdl.handle.net/2115/38823

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アクセス権	open access
URI	https://hdl.handle.net/2115/38823
タイトル	Quantification of tortuosity in hardened cement pastes using synchrotron-based X-ray computed microtomography
著者	Promentilla, Michael Angelo B. ; Sugiyama, T. ; Hitomi, T. ; Takeda, N.
著者名 Promentilla, Michael Angelo B.
著者名 Sugiyama, T.
著者名 Hitomi, T.
著者名 Takeda, N.
言語	英語
キーワード	Tortuosity
	Microstructure
	Cement paste
	Synchrotron microtomography
	Random walk simulation
発行日	2009-06
出版者	Elsevier Ltd.
収録物名	Cement and Concrete Research
巻(号)	39(6)
ページ	548-557
抄録	Tortuosity, as being influenced by the 3D pore micro-geometry, is an important physical quantity to understand better the effect of pore structure on transport properties of cement-based materials. This study attempts to evaluate directly this pore structure-transport parameter from the microtomographic images at spatial resolution of 0.5 μm. This resolution, is by far, to our knowledge, the highest resolution reported for 3D non-invasive imaging of hardened cement pastes. The results show the feasibility of using synchrotron microtomography coupled with 3D image analysis and random walk simulation to measure the diffusion tortuosity that has a direct bearing on transport properties. The tortuosity associated with the percolating pore space seems to reflect the pore morphology that mainly controls the transport properties in young cement pastes; thus, explaining the rough agreement of the results with the computer model or experimental evidence.
資源タイプ	学術雑誌論文
出版タイプ	Accepted Manuscript
PISSN	0008-8846
関連情報 (isVersionOf)	出版社版DOI https://doi.org/10.1016/j.cemconres.2009.03.005