Calculation of chloride ion concentration in expressed pore solution of cement-based materials exposed to a chloride salt solution

To investigate the relationship between the chloride ion concentration of the expressed pore solution (C sub e) and the exposure solution (C sub es) of cement-based materials exposed to a chloride salt solution, a calculation of the C sub e, based on an electrical double layer (EDL) model was proposed. The C sub e values were calculated using the proposed equations, applying the measured parameters: relative potential (δψ0), dielectric constant (ε), porosity (P), bulk density (D), volume percentage (p sub i) of pores with diameter d sub i. The calculations explain why C sub e does not always equal to C sub es. The results indicate that the expression method does not test the concentration of free chloride ions in the bulk solution (C sub Cl-b) or the average concentration of the transportable chloride ions (C sub ttr.a) in the pores. However, the ratio (C sub r) of C sub e to C sub Cl-b and the relationship between C sub e and C sub ttr.a can be calculated to more accurately measure chloride ion migration in cement-based materials.

• Record URL:
  • https://doi.org/10.1016/j.cemconres.2016.08.006
• Record URL:
  • http://www.sciencedirect.com/science/article/pii/S0008884616300138
• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/issn/00088846
• Supplemental Notes:
  • Abstract reprinted with permission from Elsevier.
• Authors:
  • He, Fuqiang
  • Shi, Caijun
  • Hu, Xiang
  • Wang, Ruipan
  • Shi, Zhenguo
  • Li, Qingling
  • Li, Pingliang
  • An, Xiaopeng
• Publication Date: 2016-11

Language

• English

Media Info

• Media Type: Web
• Features: Appendices; Figures; References; Tables;
• Pagination: pp 168-176
• Serial:
  • Cement and Concrete Research
  • Volume: 89
  • Publisher: Elsevier
  • ISSN: 0008-8846
  • Serial URL: http://www.sciencedirect.com/science/journal/00088846

Subject/Index Terms

• TRT Terms: Cement mortars; Chloride content
• Uncontrolled Terms: Chloride ion migration; Electrical double layer; Pore solution
• Subject Areas: Highways; Materials;

Filing Info

• Accession Number: 01617740
• Record Type: Publication
• Files: TRIS
• Created Date: Nov 26 2016 3:50PM