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Effect 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 cycling
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DOI：10.1016/j.dibe.2026.100998.png)
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Abstract
En 中文
• CGFA dosage governed sulfate and freeze-thaw durability of AACGFAM. • 20% CGFA delivered the best overall durability performance. • Moderate CGFA refined pore structure and lowered cumulative pore volume. • Excessive CGFA increased crack connectivity and transport pathways. • Dual deterioration mechanisms were clarified by XRD, SEM, FTIR and BET.
Keywords:
Coal gangue fine aggregate
Alkali-activated mortar
Sulfate attack
Freeze-thaw cycling
Pore evolution
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