Strength and Ductility Enhancement in Coarse-Aggregate UHPC via Fiber Hybridization: Micro-Mechanistic Insights and Artificial Neural Network Prediction.

Materials (Basel) · 2026 · PMC12787242 · PMID 41515821

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The steel fiber remained highly significant in flexural performance (F = 43.11 > Fa = 0.05) but lost relative significance in compressive strength, possibly due to the matrix modification induced by the incorporation of fly ash, which alters fiber–matrix interfacial bonding conditions.

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