【摘 要】
：
The test of fast-freezing method is employed to research the freezing resistance of C60and C80 high-performance concrete with nanometer-SiO2,and XRD and SEM are
【机 构】
：
School of Civil and Hydraullic Engineering,Faculty of Engineering U.K.M
【出 处】
：
武汉理工大学学报（材料科学版）（英文版）
【基金项目】
：
Coorperative Item with Malaysia Fund
论文部分内容阅读
The test of fast-freezing method is employed to research the freezing resistance of C60and 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.
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