Innovative Study of Non-steady-state Tritiated Water Diffusion Test
This paper proposes a new method for testing molecular diffusion in saturated cement materials. A saturated specimen of porous materials was placed between 2 compartments; the upstream compartment contained tritiated water (HTO) and the downstream compartment a solution without HTO. The activity gradient between the compartments induced a flux of tritiated water through the sample. Usually, the flux of HTO is repeatedly measured by analyzing the content of the downstream cell in the steady state. In this work, a theoretical study based on Fick's laws is used to show it is possible to determine the diffusion coefficient D-sub-Fick1 by considering only 2 measurements obtained in the non-steady state in the downstream compartment of a diffusion cell. A significant time savings (50%) can be realized. An experimental study of this innovative method is presented.
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Availability:
- Find a library where document is available. Order URL: http://worldcat.org/issn/00088846
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Supplemental Notes:
- Abstract reprinted with permission from Elsevier
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Authors:
- Nugue, F
- Yssorche-Cubaynes, M-P
- Ollivier, J P
- Publication Date: 2007-8
Language
- English
Media Info
- Media Type: Print
- Features: Figures; References; Tables;
- Pagination: pp 1145-1151
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Serial:
- Cement and Concrete Research
- Volume: 37
- Issue Number: 8
- Publisher: Elsevier
- ISSN: 0008-8846
- Serial URL: http://www.sciencedirect.com/science/journal/00088846
Subject/Index Terms
- TRT Terms: Cement; Concrete construction; Corrosion; Structural deterioration and defects
- Identifier Terms: Fick's Second Law of Diffusion
- Uncontrolled Terms: Chloride ingress; Diffusion; Moisture transport properties; Saturated conditions
- Subject Areas: Highways; Materials; I32: Concrete;
Filing Info
- Accession Number: 01076974
- Record Type: Publication
- Files: TRIS
- Created Date: Sep 27 2007 7:07AM