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February 19, 2026AIP AdvancesOpen Access

Study on the mechanical and durability properties of geopolymer concrete mixed with coal gangue coarse aggregate

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Examines geopolymer concrete performance using coal gangue aggregates, suggesting implications for resource conservation.

This research focuses on evaluating the mechanical and durability properties of geopolymer concrete using coal gangue as aggregate.
Replaced natural aggregates with both raw and calcined coal gangue in concrete preparation.
Analyzed effects on compressive strength, chloride ion permeability, and frost resistance across different substitution rates.
Used scanning electron microscopy to explore internal mechanisms of the concrete.
Increased coal gangue content generally weakened compressive strength, impermeability, and frost resistance.
Calcined coal gangue showed significantly higher compressive strength compared to raw coal gangue.
Frost resistance was most affected by coal gangue content, showing minimal difference between raw and calcined samples.

Chen et al. (2026) studied this question.

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