Freezing resistance of HPC with nano-SiO2

Baomin Wang; Lijiu Wang; F. C. Lai

doi:10.1007/s11595-006-1085-y

Journal of Wuhan University of Technology Materials Science Edition ›› 2008, Vol. 23 ›› Issue (1) : 85 -88. DOI: 10.1007/s11595-006-1085-y

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Freezing resistance of HPC with nano-SiO₂

Baomin Wang ¹^,^{^{^a}}
, Lijiu Wang ¹
, F. C. Lai ²

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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.

Keywords

nano-SiO₂ / high-performance concrete / freezing resistance

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Baomin Wang, Lijiu Wang, F. C. Lai. Freezing resistance of HPC with nano-SiO₂. Journal of Wuhan University of Technology Materials Science Edition, 2008, 23(1): 85-88 DOI:10.1007/s11595-006-1085-y

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References

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[3]	Wang L.-j., Wang B.-min. Research on Effects of Nano-SiO₂ on the Properties of Portland Cement[J]. Journal of Dalian University of Technology, 2003, 43(5): 666-999.