Release Time:2019-03-11  Hits:

Indexed by: Conference Paper

Date of Publication: 2010-09-25

Included Journals: Scopus、SCIE、CPCI-S、EI

Volume: 686

Page Number: 432-437

Key Words: Cement concrete; High performance concrete; Nano-material; Strength

Abstract: 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-SiO(2)can 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.