Utilization of Thermally Treated SiC Nanowhiskers and Superplasticizer for Cementitious Composite Production
Artykuł w czasopiśmie
MNiSW
140
Lista 2021
| Status: | |
| Autorzy: | Azevedo Nagilla, Neto José Andrade, de Matos Paulo Ricardo, Betioli Andrea, Szeląg Maciej, Gleize Philippe |
| Dyscypliny: | |
| Aby zobaczyć szczegóły należy się zalogować. | |
| Rok wydania: | 2021 |
| Wersja dokumentu: | Drukowana | Elektroniczna |
| Język: | angielski |
| Numer czasopisma: | 15 |
| Wolumen/Tom: | 14 |
| Numer artykułu: | 4062 |
| Strony: | 1 - 12 |
| Web of Science® Times Cited: | 3 |
| Scopus® Cytowania: | 3 |
| Bazy: | Web of Science | Scopus | Academic OneFile (Gale); Astrophysics Data System (SAO / NASA); CAB Direct; CAPlus / SciFinder; DOAJ; EBSCO; Ei Compendex; Inspec; PubMed; PMC; ProQuest |
| Efekt badań statutowych | NIE |
| Finansowanie: | The governmental agencies CAPES, CNPq, and FAPESC from Brazil provided financial support for the acquisition of the equipment used. |
| Materiał konferencyjny: | NIE |
| Publikacja OA: | TAK |
| Licencja: | |
| Sposób udostępnienia: | Witryna wydawcy |
| Wersja tekstu: | Ostateczna wersja opublikowana |
| Czas opublikowania: | W momencie opublikowania |
| Data opublikowania w OA: | 21 lipca 2021 |
| Abstrakty: | angielski |
| Nanomaterials are potential candidates to improve the mechanical properties and durability of cementitious composites. SiC nanowhiskers (NWs) present exceptional mechanical properties and have already been successfully incorporated into different matrices. In this study, cementitious composites were produced with a superplasticizer (SP) and 0–1.0 wt % SiC NWs. Two different NWs were used: untreated (NT-NW) and thermally treated at 500 °C (500-NW). The rheological properties, cement hydration, mechanical properties, and microstructure were evaluated. The results showed that NWs incorporation statistically increased the yield stress of cement paste (by up to 10%) while it led to marginal effects in viscosity. NWs enhanced the early cement hydration, increasing the main heat flow peak. NWs incorporation increased the compressive strength, tensile strength, and thermal conductivity of composites by up to 56%, 66%, and 80%, respectively, while it did not statistically affect the water absorption. Scanning electron microscopy showed a good bond between NWs and cement matrix in addition to the bridging of cracks. Overall, the thermal treatment increased the specific surface area of NWs enhancing their effects on cement properties, while SP improved the NWs dispersion, increasing their beneficial effects on the hardened properties. |
