Rong Zhidan, Zhao Mingyu, Wang Yali
School of Materials Science and Engineering, Southeast University, Nanjing 21189, China.
JiangSu Key Laboratory of Construction Materials, Nanjing 211189, China.
Materials (Basel). 2020 Feb 1;13(3):646. doi: 10.3390/ma13030646.
In this research, silane coupling agent was used to modify the surface of nano-SiO, particles and the effects of modified nano-SiO 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, the modified nano-SiO promoted and accelerated the hydration process of cement. The pozzolanic effect, filling effect, and nucleation effect of modified nano-SiO made the microstructure of the composite more compact, and thus improved static mechanical properties of cement-based composites.
在本研究中，使用硅烷偶联剂对纳米二氧化硅颗粒表面进行改性，并系统研究了改性纳米二氧化硅颗粒对高性能水泥基复合材料力学性能的影响及其作用机理。结果表明，最佳改性参数为偶联剂含量10%、反应温度65℃、反应时间8h。与未改性的纳米二氧化硅相比，改性纳米二氧化硅促进并加速了水泥的水化过程。改性纳米二氧化硅的火山灰效应、填充效应和成核效应使复合材料的微观结构更加致密，从而提高了水泥基复合材料的静态力学性能。
