Numerical investigation of external sulfate attack and its effect on chloride binding and diffusion in concrete

Cheng-lin Zhang, Wei-kang Chen, Song Mu, Branko Šavija, Qing-feng Liu

Research output: Contribution to journalArticleScientificpeer-review

9 Citations (Scopus)

Abstract

Reinforced concrete (RC) structures may suffer from serious durability problems during long-term service. To investigate the deterioration of RC structures subjected to the dual attacks of chlorides and sulfates, this study proposes a coupled model for external sulfate attack (ESA) and its effect on chloride binding and diffusion. To account for the influence of sulfate attack on chloride binding, a reduction function is proposed. The effect of sulfate-induced damage on the chloride diffusion and chloride binding is considered through a damage function. The coupled model is validated against third-party experimental data from multiple perspectives. Some important factors such as solution concentration, immersion time, curing time and water-cement ratio, as well as how these factors affect the impact of sulfate attack on chloride transport, were elaborated. The findings may bring insights to the durability design of RC structures serving in harsh environments.
Original languageEnglish
Article number122806
Pages (from-to)1-17
Number of pages17
JournalConstruction and Building Materials
Volume285
DOIs
Publication statusPublished - 2021

Bibliographical note

Accepted author manuscript

Keywords

  • Binding capacity
  • Chloride diffusivity
  • Damage evolution
  • External sulfate attack
  • Multi-phase

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