Freezing Resistance of HPC with Nano-SiO_2  

作　　者：王宝民 WANG Lijiu F C Lai 

机构地区：[1]School of Civil and Hydraullic Engineering, Dalian University of Technology, Dalian 116024, China [2]Faculty of Engineering U.K.M, Selangor Darul Ehsan 43600, Malaysia

出　　处：《Journal of Wuhan University of Technology(Materials Science)》2008年第1期85-88,共4页武汉理工大学学报（材料科学英文版）

基　　金：Coorperative Item with Malaysia Fund

摘　　要：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.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.

关 键 词：NANO-SIO2 high-performance concrete freezing resistance 

分 类 号：TB383.1[一般工业技术—材料科学与工程]