Influence of Nano-SiO2 on the Strength of High Performance Concrete
The influence of Nano-SiO2 (NS) on the strength of high-performance concrete (W/B=0.24, W/B=0.29, W/B=0.34) has been studied in this paper. The results show that compressive strengths of concrete in both the early and later stage can be improved by adding Nano-SiO2 content. And the influence on the early compressive strength is greater than that on the later compressive strength. According to the results, 3%-5% Nano-SiO2can be used as the proper mixing ratio. X-ray diffraction, SEM (scanning electron microscope) and mercury injection experiment were used to analyze the action principle of Nano-SiO2 microscopically, the microscopic characteristics of concrete can be significantly improved through interfacial and filling effect effects so that the performance of concrete can be accordingly improved.
Yafang Han, Fusheng Pan, Jianmao Tang, Chungen Zhou
B. M. Wang "Influence of Nano-SiO2 on the Strength of High Performance Concrete", Materials Science Forum, Vol. 686, pp. 432-437, 2011