A model for predicting the relative chloride diffusion coefficient in unsaturated cementitious materials

Yong Zhang, Guang Ye

Research output: Contribution to journalArticleScientificpeer-review

12 Citations (Scopus)
3 Downloads (Pure)

Abstract

An analytical model for predicting the relative chloride diffusion coefficient in cementitious materials at different degrees of water saturation is presented in this paper. The model is developed based on the Nernst-Einstein equation and conductivity of cementitious electrolyte, as well as on moisture distribution in the pore structure. Good agreement is found between the model and the experimental data. With the help of the model, the chloride diffusion coefficient of cementitious material at unsaturated state can be determined according to the chloride diffusion coefficient at saturated state, the degree of water saturation and the average pore diameter of the material. A detailed discussion about the inputs and outputs of the model is given in order to facilitate its application for engineering practice.

Original languageEnglish
Pages (from-to)133-144
Number of pages12
JournalCement and Concrete Research
Volume115
DOIs
Publication statusPublished - 1 Jan 2019

Keywords

  • Cementitious material
  • Chloride diffusion
  • Degree of water saturation
  • Modeling
  • Pore structure

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