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September 10, 2025Engineering Research Express

Deterioration of Activated Coal Gangue Powder Concrete under Combined Sulfate Attack and Freeze-Thaw Cycles

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Authors

LJLei JiangSYShuai YangSZShike Zhang

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Overview

Experimental analysis demonstrates decreased compressive strength in activated coal gangue concrete, indicating significant impacts under sulfate attack and freeze-thaw conditions.

Key Points

  • Deterioration of activated coal gangue concrete occurs with increased sulfate exposure and freeze-thaw cycles, showing a notable decline in compressive strength.
  • Relative dynamic elastic modulus loss was reduced by 13.68% in concrete containing 20% coal gangue powder compared to traditional concrete after 275 freeze-thaw cycles.
  • The study highlights that optimal coal gangue powder content enhances frost resistance, but benefits diminish beyond 30%, indicating a balance needed for structural integrity.
  • Microstructural analysis revealed that incorporating coal gangue powder improves pore structure, leading to a 24.37% reduction in porosity, enhancing overall durability.

Cite This Study

Jiang et al. (2025) studied this question.

synapsesocial.com/papers/68c182399b7b07f3a060e76fhttps://doi.org/10.1088/2631-8695/ae0268
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Also Consider

Synapse has enriched 5 closely related papers on similar clinical questions. Consider them for comparative context:

  1. 1Effect of coal gangue fine aggregate on the dual durability of alkali-activated coal gangue-slag mortar: Pore evolution and deterioration mechanisms under sulfate attack and freeze-thaw cycling2026
  2. 2Study on the Freeze-Thaw Deterioration Mechanism of Activated Coal Gangue Cementitious Concrete2026
  3. 3Study on mechanical properties and freeze-thaw damage law of steel fiber coal gangue concrete2024 · 13 citations
  4. 4Research on the effect of aggregate characteristics influencing macro-mechanical degradation and meso-damage evolution in coal gangue concrete with freeze-thaw performance2026
  5. 5Multi-Scale Analysis of the Damage Evolution of Coal Gangue Coarse Aggregate Concrete after Freeze–Thaw Cycle Based on CT Technology2024 · 19 citations