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Effects of Modified Nano-SiO(2) Particles on Properties of High-Performance Cement-Based Composites
In this research, silane coupling agent was used to modify the surface of nano-SiO(2), particles and the effects of modified nano-SiO(2) particles on the mechanical properties of high-performance cement-based composites and its mechanism were systematically studied. The results indicated that the op...
| Autores principales: | , , |
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| Formato: | Online Artículo Texto |
| Lenguaje: | English |
| Publicado: |
MDPI
2020
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| Materias: | |
| Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7041374/ https://www.ncbi.nlm.nih.gov/pubmed/32024078 http://dx.doi.org/10.3390/ma13030646 |
| Sumario: | In this research, silane coupling agent was used to modify the surface of nano-SiO(2), particles and the effects of modified nano-SiO(2) particles on the mechanical properties of high-performance cement-based composites and its mechanism were systematically studied. The results indicated that the optimum modification parameters were a coupling agent content of 10%, reaction temperature of 65 °C, and reaction time of 8 h. Compared with the unmodified nano-SiO(2), the modified nano-SiO(2) promoted and accelerated the hydration process of cement. The pozzolanic effect, filling effect, and nucleation effect of modified nano-SiO(2) made the microstructure of the composite more compact, and thus improved static mechanical properties of cement-based composites. |
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