Evaluation of Microstructure and Transport Properties of Deteriorated Cementitious Materials from Their X-ray Computed Tomography (CT) Images

Promentilla, Michael Angelo B.; Cortez, Shermaine M.; Papel, Regina Anne D. C.; Tablada, Bernadette M.; Sugiyama, Takafumi

Evaluation of Microstructure and Transport Properties of Deteriorated Cementitious Materials from Their X-ray Computed Tomography (CT) Images

Promentilla, Michael Angelo B.; Cortez, Shermaine M.; Papel, Regina Anne D. C. et al.

Materials, 2016, 9(5), 388

Permalink : https://hdl.handle.net/2115/62702

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アクセス権	open access
URI	https://hdl.handle.net/2115/62702
タイトル	Evaluation of Microstructure and Transport Properties of Deteriorated Cementitious Materials from Their X-ray Computed Tomography (CT) Images
著者	Promentilla, Michael Angelo B. ; Cortez, Shermaine M. ; Papel, Regina Anne D. C. ; Tablada, Bernadette M. ; Sugiyama, Takafumi
著者名 Promentilla, Michael Angelo B.
著者名 Cortez, Shermaine M.
著者名 Papel, Regina Anne D. C.
著者名 Tablada, Bernadette M.
e-Rad_Researcher 70261865 著者名 Sugiyama, Takafumi
言語	英語
キーワード	3D image analysis
	X-ray microtomography
	deteriorated cement paste
	accelerated leaching
	porosity
	tortuosity
	water permeability
発行日	2016-05
出版者	MDPI
収録物名	Materials
巻(号)	9(5)
ページ	388
抄録	Pore structure, tortuosity and permeability are considered key properties of porous materials such as cement pastes to understand their long-term durability performance. Three-dimensional image analysis techniques were used in this study to quantify pore size, effective porosity, tortuosity, and permeability from the X-ray computed tomography (CT) images of deteriorated pastes that were subjected to accelerated leaching test. X-ray microtomography is a noninvasive three-dimensional (3D) imaging technique which has been recently gaining attention for material characterization. Coupled with 3D image analysis, the digitized pore can be extracted and computational simulation can be applied to the pore network to measure relevant microstructure and transport properties. At a spatial resolution of 0.50 mu m, the effective porosity (phi(e)) was found to be in the range of 0.04 to 0.33. The characteristic pore size (d) using a local thickness algorithm was found to be in the range of 3 to 7 mu m. The geometric tortuosity (tau(g)) based on a 3D random walk simulation in the percolating pore space was found to be in the range of 2.00 to 7.45. The water permeability values (K) using US NIST Permeability Stokes Solver range from an order of magnitudes of 10(-14) to 10(-17) m(2). Indications suggest that as effective porosity increases, the geometric tortuosity increases and the permeability decreases. Correlation among these microstructure and transport parameters is also presented in this study.
資源タイプ	学術雑誌論文
出版タイプ	Version of Record
権利情報	Creative Commons Attribution 4.0 International
権利情報	© 2016 by the authors; licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/4.0/).
PISSN	1996-1944
関連情報 (isIdenticalTo)	出版社版DOI https://doi.org/10.3390/ma9050388