Effects of Material and Environmental Parameters on Chloride Penetration Profiles in Concrete Structures

On the basis of the transport mechanism of chloride ions, a prediction model of chloride penetration into concrete structures has been developed. The model includes the diffusion of chloride and its dependencies on temperature, age, relative humidity, chloride binding, and chloride convection by moisture transport. The experimental program has been set up to verify the model developed in the present study. Several series of concrete specimens were immersed in 3.5% chloride solutions for 15 weeks, and the chloride profiles of the specimens were measured and compared to the predicted chloride profiles. In addition, field measurements were also conducted. From 10-year-old bridge piers, the chloride profiles in concrete under the tidal zone were measured and compared with the predicted chloride profiles. The effects of chloride binding, relative humidity, temperature, exposure condition, and age-dependence on the chloride penetration in concrete were clarified from the present analyses. It was found that all these variables affect greatly the chloride penetration profiles in concrete. A comparison of the lab and field test data with the present theory confirms that the proposed model can be realistically used to predict the penetration of chloride ions into concrete structures under sea environments. Further, these results may be efficiently used to realistically assess and design durable concrete structures.

  • Availability:
  • Supplemental Notes:
    • Abstract reprinted with permission from Elsevier
  • Authors:
    • Oh, Byung Hwan
    • Jang, Seung Yup
  • Publication Date: 2007-1

Language

  • English

Media Info

Subject/Index Terms

Filing Info

  • Accession Number: 01042268
  • Record Type: Publication
  • Files: TRIS
  • Created Date: Feb 27 2007 11:19PM