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.

• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/issn/00088846
• Supplemental Notes:
  • Abstract reprinted with permission from Elsevier
• 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
• 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