Paper Title:
Effect of Interfacial Transition Zone on Chloride Diffusion Coefficient
  Abstract

A three-phase composite circle model is presented in this paper to assess the effect of interfacial transition zone (ITZ) on the chloride diffusion coefficient of concrete. Firstly, the distribution of circular aggregate particles was simulated in a square concrete element. Based on the simulated concrete mesostructure, the Monte Carlo algorithm was adopted to numerically evaluate the ITZ area fraction for different concrete mixes. A parametric study was then conducted to quantify the effects of the largest aggregate diameter, ITZ thickness and aggregate gradation on the ITZ area fraction. Secondly, the ITZ was modeled as a thin-wall annular plate located between a circular aggregate particle and a thick-wall cement paste annular plate. With the three-phase composite circle model, an analytical solution was derived for the chloride diffusion coefficient of concrete. Finally, the derived solution was verified by experimental results obtained from the research literature and a quantitative relationship between the thickness and chloride diffusion coefficient of ITZ was established.

  Info
Periodical
Key Engineering Materials (Volumes 302-303)
Edited by
Nai-Qian Feng and Gai-Fei Peng
Pages
167-174
DOI
10.4028/www.scientific.net/KEM.302-303.167
Citation
J. J. Zheng, S. L. Xu, X. Z. Zhou, "Effect of Interfacial Transition Zone on Chloride Diffusion Coefficient", Key Engineering Materials, Vols. 302-303, pp. 167-174, 2006
Online since
January 2006
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Price
$32.00
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