Similarity of Chloride Diffusivity of Concrete Exposed to Different Environments

According to the main meteorological parameters and chloride concentration of field exposure tests, indoor artificial climate and dry-wet cycle simulated tests were designed to investigate the similarity of apparent and instantaneous diffusion coefficients in different ambient environments. Results show that chloride diffusion coefficients increased with water-cement ratio (w/c) and decreased with exposure time, regardless of the environment. Besides, instantaneous diffusion coefficients are all less than the corresponding apparent diffusion coefficients; their differences decrease with the increasing of w/c and show first a decrease and then gradually an increasing trend with exposure time. Environmental factors have little effect on the similarity constant of instantaneous diffusion coefficients. A quadratic function can be used to describe the relationship between age reduction factors of apparent and instantaneous diffusion coefficients and w/c in different environments. According to the Second Similarity Theorem, specimens exposed to a natural tidal environment for 240 days can be simulated by that exposed to an artificial climate simulated environment for 80 days effectively.

• Record URL:
  http://dx.doi.org/10.14359/51727021
• Record URL:
  https://www.concrete.org/publications/internationalconcreteabstractsportal.aspx?m=details&ID=51727021
• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/oclc/13846872
• Supplemental Notes:
  • Abstract reprinted with permission from the American Concrete Institute.
• Authors:
  • Zhang, Jun-Zhi
  • Zhou, Xiao-Yun
  • Zhao, Jing
  • Wang, Meng
  • Gao, Yan-Hong
  • Zhang, Yu-Rong
• Publication Date: 2020-9

Language

• English

Media Info

• Media Type: Web
• Pagination: pp 27-37
• Serial:
  • ACI Materials Journal
  • Volume: 117
  • Issue Number: 5
  • Publisher: American Concrete Institute (ACI)
  • ISSN: 0889-325X
  • Serial URL: https://www.concrete.org/publications/acimaterialsjournal.aspx

Subject/Index Terms

• TRT Terms: Chloride content; Concrete; Field tests; Simulation; Wetting and drying tests
• Subject Areas: Highways; Materials; Pavements;

Filing Info

• Accession Number: 01760972
• Record Type: Publication
• Files: TRIS
• Created Date: Nov 25 2020 11:33AM