This study reports on the effect of ultrasonicating silica fume (SF) and colloidal nanosilica (NS) to fabricate 4 binary (90% cement + 10% SF or 98% cement + 2% NS) and 2 ternary (90% cement + 8% SF + 2% NS) pastes in replacement to Portland cement. The calcium-silicate-hydrate (C–S–H) microstructure is investigated whereas the compressive strength (CS) and porosity data are assessed and discussed. Up to 28 days of hydration the time (t) dependence of the compressive strength (CS vs. t) is fitted using an exponential-like model based on the first order kinetics approximation, from which one extracts the asymptotic C–value and the half-life aging time (t_h). A significant increase in the asymptotic C–value of the paste while combining ultrasonicated SF and NS is observed at 1 and 3 days, besides presenting the lowest Ca/Si ratio, the highest mean C–S–H chain length and the highest porous structure refinement among all the evaluated pastes at 28 days.

这项研究报告了超声处理硅粉（SF）和胶态纳米二氧化硅（NS）来制造4种二元共聚物（90％水泥+ 10％SF或98％水泥+ 2％NS）和2种三元共聚物（90％水泥+ 8％ SF + 2％NS）糊剂替代波特兰水泥。研究了水合硅酸钙（C–S–H）的微观结构，同时评估和讨论了抗压强度（CS）和孔隙率数据。在长达28天的水合作用的基础上，使用基于一阶动力学逼近的指数模型拟合抗压强度的时间（t）依赖性（CS vs. t），从中提取渐近C值和一半寿命老化时间（t _h）。在第1天和第3天，同时结合超声SF和NS观察到糊的渐近C值显着增加，除了呈现最低的Ca / Si比，最高的C–S–H平均链长和最高的多孔结构在28天时对所有评估的糊进行细化。