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September 10, 2025BuildingsOpen Access

The Influence of Coal Gangue on the Mechanical Properties of Ground-Granulated Blast Furnace Slag-Based Geopolymers

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This study examines the influence of coal gangue and GGBFS on the mechanical properties of geopolymers, indicating performance variations.

Results indicate that increasing coal gangue reduces compressive strength and increases setting time.
The compressive strength at 28 days reaches 107.55 MPa with 100% GGBFS, but only 21.80 MPa with 100% CG.
Microscopic analysis shows that 50% CG specimens have a compact microstructure with smaller pore sizes.
GGBFS content significantly impacts geopolymer performance, suggesting effective waste recycling strategies.

Xiao-ping et al. (2025) studied this question.

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This study examines the influence of coal gangue and GGBFS on the mechanical properties of geopolymers, indicating performance variations.