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April 15, 2026Journal of Composites ScienceOpen Access

Study on the Freeze-Thaw Deterioration Mechanism of Activated Coal Gangue Cementitious Concrete

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Authors

JTJun TianCLChao LiuYYYongjun Yu

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Overview

Tests show freeze-thaw resistance in activated coal gangue concrete, suggesting optimal mix for cold regions.

Key Points

  • The study aims to investigate how different ratios of activated coal gangue affect the freeze-thaw durability of cementitious concrete.
  • Conducted freeze-thaw cycle tests to assess durability under varying ratios of activated coal gangue powder.
  • Used scanning electron microscopy to analyze microstructural changes in the concrete's internal pores.
  • Employed nuclear magnetic resonance spectroscopy to further investigate pore characteristics after freeze-thaw cycles.
  • Increased freeze-thaw cycles led to significant deterioration of the concrete's pore structure.
  • Initially, both the number of pores and overall porosity decreased with increased gangue powder, followed by a subsequent increase.
  • The optimal freeze-thaw resistance was observed with 35% activated coal gangue powder, maintaining superior pore structure and performance.

Cite This Study

Tian et al. (2026) studied this question.

synapsesocial.com/papers/69df2cf7e4eeef8a2a6b2106https://doi.org/10.3390/jcs10040208
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