Synergistic mitigation of brittleness in nanosilica-modified concrete through fly ash substitution
Artykuł w czasopiśmie
MNiSW
70
Lista 2024
| Status: | |
| Autorzy: | Golewski Grzegorz Ludwik |
| Dyscypliny: | |
| Aby zobaczyć szczegóły należy się zalogować. | |
| Rok wydania: | 2026 |
| Wersja dokumentu: | Drukowana | Elektroniczna |
| Język: | angielski |
| Numer czasopisma: | 17 |
| Wolumen/Tom: | 13 |
| Strony: | 2 - 15 |
| Impact Factor: | 2,5 |
| Web of Science® Times Cited: | 0 |
| Bazy: | Web of Science | Google Scholar |
| Efekt badań statutowych | NIE |
| Finansowanie: | This work was financially supported by the Ministry of Education and Science of the Republic of Poland within the statutory Research Numbers: FD-20/IL-4/017. |
| Materiał konferencyjny: | NIE |
| Publikacja OA: | TAK |
| Licencja: | |
| Sposób udostępnienia: | Witryna wydawcy |
| Wersja tekstu: | Ostateczna wersja opublikowana |
| Czas opublikowania: | Po opublikowaniu |
| Data opublikowania w OA: | 1 września 2026 |
| Abstrakty: | angielski |
| The incorporation of synthetic nanosilica (NS) into cementitious composites accelerates earlyage hydration and significantly enhances mechanical strength but inherently induces extreme structural brittleness. This study investigates the synergistic mitigation of NS-induced brittleness through the incorporation of Class F fly ash (FA) acting as a delayed pozzolanic buffer. A comprehensive experimental program was conducted on four distinct concrete mixtures, evaluating both fundamental static mechanical properties and advanced non-linear fracture mechanics parameters derived from experimental load–crack mouth opening displacement (F–CMOD) envelope curves. The multi-criteria evaluation revealed significant behavioral transitions governed by the hybrid binder composition. The ternary mixture containing 5% NS and 15% FA achieved the highest absolute mechanical performance, increasing the compressive and splitting tensile strengths to 137% and 136% of the reference values, respectively. Conversely, increasing the FA substitution to 25% optimally maximized the damage tolerance and post-peak energy dissipation capacity, leading to a 207% increase in the total fracture Energy (Gf) and a 149% enhancement of the characteristic length (lch). Furthermore, Pearson correlation analysis established a highly robust positive linear relationship (r = 0.9258) between the Gf and the lch. This provides definitive statistical evidence that the overall structural ductility of the investigated hybrid nanocomposites is intrinsically driven by their energetic fracture resistance during the post-peak softening phase. |
