Theoretical evaluation of diffusion coefficient of chloride ion in mortar from mobility

Nobuaki Otsuki, Makoto Hisada, Takayuki Otani, Toshio Maruyama

研究成果: Article査読

5 被引用数 (Scopus)

抄録

Many researchers have been trying to evaluate the diffusion coefficient of chloride ion in concrete by using qualitative and quantitative electromigration tests. Up to now, however, there has been no sufficient method to closely determine the diffusion coefficient of chloride ion through electromigration tests. In this paper, the diffusion coefficient of chloride ion in mortar by mobility is investigated through an electromigration test. Basically, the concept of Einstein's equation, which can relate the diffusion coefficient of the chloride ion and the mobility in an ideal solution (with very low concentration), is adapted. Then, for compensating the influence of the concentrations, the Debye-Hückel theory is used. Also, for considering the effect of other existing ions, namely, OH-, Na+, and K+, the electrical neutrality is taken into account. Therefore, using Einstein's equation, the Debye-Hückel theory, and electrical neutrality, the diffusion coefficient of chloride ion can be calculated theoretically from the mobility. The correctness of the calculation is checked by a series of tests.

本文言語English
ページ(範囲)627-633
ページ数7
ジャーナルACI Materials Journal
96
6
出版ステータスPublished - 1999 11 1
外部発表はい

ASJC Scopus subject areas

  • 土木構造工学
  • 建築および建設
  • 材料科学(全般)

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