Release Time:2019-03-10  Hits:

Indexed by: Journal Article

Date of Publication: 2008-02-01

Journal: JOURNAL OF WUHAN UNIVERSITY OF TECHNOLOGY-MATERIALS SCIENCE EDITION

Included Journals: ISTIC、EI、SCIE

Volume: 23

Issue: 1

Page Number: 85-88

ISSN: 1000-2413

Key Words: nano-SiO2; high-performance concrete; freezing resistance

Abstract: The test of fast-freezing method is employed to research the freezing resistance of C60 and C80 high-performance concrete with nanometer-SiO2, and XRD and SEM are employed to analyze the mechanism of its influence. The experimental results show that the freezing resistance of high-performance concrete has been effectively improved. The compressive strength of C60, C70 and C80 high-performance concrete added with nano-SiO2 can be improved by 8%, 6% and 5% respectively, the weight loss can be reduced by 1%, 0.6% and 0.3% respectively and the relative dynamic elastic modulus can be improved by 7%, 4% and 6% respectively after the 300 times freeze-thaw cycle.