STRENGTH DETERIORATION OF HIGH STRENGTH CONCRETE EXPOSED TO HIGH TEMPERATURE AND ITS PREVENTION AND REHABILITATION

被引：0

作者：

Li, Min ^{[1
,3
]}

Wu, Zhishen ^{[2
,3
]}

Qian, Chunxiang ^{[1
]}

Sun, Wei ^{[1
]}

机构：

[1] Southeast Univ, Coll Mat Sci & Engn, Jiangsu Key Lab Construct Mat, Nanjing 211189, Jiangsu, Peoples R China

[2] Ibaraki Univ, Dept Urban & Civil Engn, Hitachi, Ibaraki 3168511, Japan

[3] Southeast Univ, Int Inst Urban Syst Engn, Nanjing 211189, Jiangsu, Peoples R China

来源：

ADVANCES IN CIVIL ENGINEERING MATERIALS, 2008: 50-YEAR TEACHING AND RESEARCH ANNIVERSARY OF PROFESSOR SUN WEI | 2010年 / 71卷

基金：

中国国家自然科学基金;

关键词：

D O I：

暂无

中图分类号：

TU [建筑科学];

学科分类号：

0813 ;

摘要：

High strength concrete (HSC) has been used in situations where it may be exposed to elevated temperatures. Properties of high strength concrete are deteriorated after concrete is exposed to high temperature. In this study, Strength deterioration of high strength concrete exposed to high temperature and its prevention and rehabilitation are investigated experimentally. Test results show that the compressive strength of both HSC and normal strength concrete (NSC) decreases when the exposed temperature is higher than 200 degrees C. After fly ash are replaced by Red Mud (RM) or Metakaolin (K), deterioration of compressive strength can be reduced, moreover, mixing polypropylene(PP) fiber is also an effective prevention method due to its spalling resistance action. Re-curing in water, sodium silicate/magnesium fluosilicate composition solution (NSF) or aluminum sulfate solution (AS) can rehabilitate compressive strength of HSC exposed to high temperature. In addition, SEM analysis, X-ray diffraction analysis and Mercury injection test are also carried out to analysis microstructure of HSC exposed to high temperature.

引用

页码：263 / 274

页数：12

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