Professor
Supervisor of Doctorate Candidates
Supervisor of Master's Candidates
Title : 大连理工大学（土木水力学院） 建筑材料研究所 所长 大连理工大学建筑能源技术研究中心 主任 辽宁省复合材料学会常务副理事长兼秘书长 政协辽宁省委员会委员 “建筑技术与应用”“混凝土”和“国外连建材科技“等杂志编委
Title of Paper:Freezing resistance of HPC with nano-SiO2
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Date of Publication:2008-02-01
Journal:JOURNAL OF WUHAN UNIVERSITY OF TECHNOLOGY-MATERIALS SCIENCE EDITION
Included Journals:SCIE、EI、ISTIC
Volume:23
Issue:1
Page Number:85-88
ISSN No.: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.
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