Thermodynamic modeling of iron sulfide reactions in concrete

This study investigates the deterioration mechanisms of concrete structures caused by oxidation of iron sulfide minerals present in aggregates—a recent durability issue that is yet to be comprehensively understood. Using thermodynamic modeling, the influence of oxygen ingress on the phase assemblage of cementitious systems was evaluated. Results indicate that the phase evolution upon iron sulfide reactions is mainly governed by the formation of ettringite, gypsum, goethite, and brucite, along with reductions in pore solution pH. The insights gained from the thermodynamic models could provide valuable information for understanding the long-term performance of concrete containing iron sulfide-bearing aggregates.

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Work Title Thermodynamic modeling of iron sulfide reactions in concrete
Access
Open Access
Creators
  1. Zhanzhao Li
  2. Aleksandra Radlinska
Keyword
  1. Concrete durability
  2. Iron sulfide reactions
  3. Mechanisms
  4. Thermodynamic modeling
License In Copyright (Rights Reserved)
Work Type Conference Proceeding
Publisher
  1. Proceedings of the 1st International Conference on Iron Sulfide Reactions in Concrete
Publication Date May 2024
Related URLs
  1. https://icisr.ca
Deposited January 04, 2025

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Version 1
published

  • Created

    January 04, 2025 23:48 by zzl244

  • Updated

    January 04, 2025 23:48 by [unknown user]

  • Updated Keyword, Related URLs, Description, and 1 more Show Changes

    January 05, 2025 00:04 by zzl244

    Keyword
    • Concrete durability, Iron sulfide reactions, Mechanisms, Thermodynamic modeling
    Related URLs
    • https://icisr.ca
    Description
    • This study investigates the deterioration mechanisms of concrete structures caused by oxidation of iron sulfide minerals present in aggregates—a recent durability issue that is yet to be comprehensively understood. Using thermodynamic modeling, the influence of oxygen ingress on the phase assemblage of cementitious systems was evaluated. Results indicate that the phase evolution upon iron sulfide reactions is mainly governed by the formation of ettringite, gypsum, goethite, and brucite, along with reductions in pore solution pH. The insights gained from the thermodynamic models could provide valuable information for understanding the long-term performance of concrete containing iron sulfide-bearing aggregates.
    Publication Date
    • 2024-05
  • Added Creator Zhanzhao Li

    January 05, 2025 00:05 by zzl244

  • Added Creator Aleksandra Radlinska

    January 05, 2025 00:05 by zzl244

  • Added ICISR2024_extended_abstract_ZL_AR.pdf

    January 05, 2025 00:19 by zzl244

  • Updated Publisher, License Show Changes

    January 05, 2025 00:41 by zzl244

    Publisher
    • Proceedings of the 1st International Conference on Iron Sulfide Reactions in Concrete
    License
    • https://rightsstatements.org/page/InC/1.0/
  • Published

    January 05, 2025 00:41 by zzl244

  • Updated

    January 05, 2025 21:04 by [unknown user]