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Synergistic effects of nano-SiO2 and PVA fibers on fracture behavior of high-volume fly ash cementitious composites: Experimental and peridynamic modeling
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DOI：10.1016/j.cscm.2026.e06405.png)
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Abstract
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• Synergistic effects of nano-SiO2 and PVA fibers on HVFA composites are studied. • Optimal mix (1.5% NS + 1.0% PVA) boosts fracture energy by 3940.8% and toughness by 204.2%. • Peridynamic simulations can reasonably reproduce experimental load-CMOD curves. • Nano-SiO2 strengthens fiber-matrix interface, shifting failure from pull-out to rupture.
Keywords:
High-volume fly ash
Cementitious composites
Nano-silica
Polyvinyl alcohol fibers
Fracture behavior
Peridynamic modeling
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