Analysis of time-dependent chloride diffusion in surface-treated concrete based on a rapid numerical approach

Tiao Wang, Jian Jun Zheng, Jian Guo Dai

Research output: Journal article publicationJournal articleAcademic researchpeer-review

Abstract

Reinforcement corrosion induced by chloride penetration is a major threat to reinforced concrete structures in marine environments. The use of surface treatments to improve the durability of reinforced concrete structures has drawn increasing attention in recent decades due to their cost-effectiveness and convenience in construction. However, current knowledge of a practical, durable design to protect surface-treated concrete structures from chloride-induced steel corrosion remains insufficient. On this account, a rapid numerical approach was developed in this study to analyse the chloride diffusion in bilayer materials. In this approach, the time-dependency was considered for the chloride diffusion coefficients of both the surface-treated layer and the underlying concrete substrate and for the surface chloride content. The validity of this approach was verified with the finite element method and the computation time was only one hundred-thousandth that of the latter. This proposed approach makes it feasible in practice to estimate the probability of corrosion initiation in surface-treated concrete structures via Monte Carlo simulation.

Original languageEnglish
JournalStructure and Infrastructure Engineering
DOIs
Publication statusAccepted/In press - 2021

Keywords

  • Chloride content
  • diffusion process
  • probability of corrosion initiation
  • rapid numerical approach
  • steel corrosion
  • surface-treated concrete
  • time-dependence

ASJC Scopus subject areas

  • Civil and Structural Engineering
  • Building and Construction
  • Safety, Risk, Reliability and Quality
  • Geotechnical Engineering and Engineering Geology
  • Ocean Engineering
  • Mechanical Engineering

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