Influence of Nano-SiO2 on the Strength of High Performance Concrete

Abstract:

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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.

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Periodical:

Edited by:

Yafang Han, Fusheng Pan, Jianmao Tang, Chungen Zhou

Pages:

432-437

DOI:

10.4028/www.scientific.net/MSF.686.432

Citation:

B. M. Wang "Influence of Nano-SiO2 on the Strength of High Performance Concrete", Materials Science Forum, Vol. 686, pp. 432-437, 2011

Online since:

June 2011

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$35.00

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