Passivation behaviour of aluminium alloys in limestone calcined clay cement (LC3)

Tangwei Mi, Danqian Wang (Lead / Corresponding author), Yongqiang Li (Lead / Corresponding author), Yaocheng Wang

Research output: Contribution to journalArticlepeer-review


Limestone calcined clay cement (LC3) has emerged as a promising alternative to traditional Portland cement (PC), offering reduced carbon dioxide emissions and improved mechanical and durability-related properties. However, concerns persist regarding the durability of reinforced LC3 concrete, particularly its lower critical chloride threshold and carbonation resistance. To address this issue, aluminium alloys were suggested to be used as an alternative reinforcement. This study investigates the passivation behaviour of aluminium alloys in LC3 and compares it with that in PC. Electrochemical measurements indicate that LC3 paste exhibits higher resistance and forms a more compact film compared to PC paste, suggesting its more protective property. XRD, Raman spectroscopy, and SEM analysis provide insights into the chemical composition and thickness of the films formed on the surfaces of aluminium alloys. This study enhances our understanding of the passivation mechanisms of aluminium alloys in LC3, facilitating their potential application in LC3-based structures.

Original languageEnglish
Article number135633
Number of pages8
JournalConstruction and Building Materials
Early online date7 Mar 2024
Publication statusPublished - 29 Mar 2024


  • Aluminium alloys
  • Corrosion resistance
  • Durability
  • Limestone calcined clay cement (LC)
  • Passivation

ASJC Scopus subject areas

  • Civil and Structural Engineering
  • Building and Construction
  • General Materials Science


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