• ISSN 0258-2724
  • CN 51-1277/U
  • EI Compendex
  • Scopus
  • Indexed by Core Journals of China, Chinese S&T Journal Citation Reports
  • Chinese S&T Journal Citation Reports
  • Chinese Science Citation Database
Volume 26 Issue 6
Dec.  2013
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Article Contents
LIU Weiqing, LIU Xin, WANG Shuguang, DU Dongsheng. Influence of Stochastic Cracks on Sulfate Diffusion in Concrete of Underground Structure[J]. Journal of Southwest Jiaotong University, 2013, 26(6): 996-1001. doi: 10.3969/j.issn.0258-2724.2013.06.005
Citation: LIU Weiqing, LIU Xin, WANG Shuguang, DU Dongsheng. Influence of Stochastic Cracks on Sulfate Diffusion in Concrete of Underground Structure[J]. Journal of Southwest Jiaotong University, 2013, 26(6): 996-1001. doi: 10.3969/j.issn.0258-2724.2013.06.005

Influence of Stochastic Cracks on Sulfate Diffusion in Concrete of Underground Structure

doi: 10.3969/j.issn.0258-2724.2013.06.005
  • Received Date: 10 Dec 2013
  • Publish Date: 25 Dec 2013
  • The influence of the stochastic crack width on sulfate diffusion coefficient and concentration in underground concrete was investigated. It is assumed that the crack is composed of crack elements, and the probability density function of crack element location along longitudinal direction of the crack follows the normal distribution. The rule of sulfate diffusion coefficient in cracking concrete varying with the cracks width was deduced. Based on Fick's second law, a modified diffusion equation was presented, and the numerical simulation was conducted with two crack shape parameters. The results showed that in both cases the sulfate ion concentration reached a steady state within 50 h. The small crack shape parameter and irregular crack shape slowed down the diffusion rate and the time for steady concentration.

     

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