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金属矿山 ›› 2010, Vol. 39 ›› Issue (09): 170-172,187.

• 综合利用 • 上一篇    下一篇

煅烧煤系高岭土和硅粉用于混凝土的对比试验

杜小满1,2,刘钦甫1,邢楠3,张金山2,程宏飞1,2   

  1. 1.中国矿业大学(北京);2.内蒙古科技大学;3.北京建筑工程学院
  • 出版日期:2010-09-15 发布日期:2010-11-09
  • 通讯作者: 杜小满,100083 北京市海淀区学院路丁11号中国矿业大学(北京)学4楼610室。
  • 作者简介:杜小满(1983—),女,中国矿业大学(北京)地球科学与测绘工程学院,博士研究生。
  • 基金资助:

    国家高技术研究发展计划(863计划)项目(编号:2008AA06Z109)

Contrastive Research on Application of Calcined Kaolin from Coal Bearing Strata and Silica Fume in Concrete

Du Xiaoman1, 2,Liu Qinfu1,Xing Nan3,Zhang Jinshan2,Cheng Hongfei1,2   

  1. 1. China University of Mining & Technology(Beijing); 2. Inner Mongolia University of Science & Technology;3. Beijing University of Civil Engineering and Architecture
  • Online:2010-09-15 Published:2010-11-09

摘要: 用煅烧煤系高岭土细粉按一定比例等量取代水泥配制C50高性能混凝土,系统研究了硬化混凝土的力学性能和耐久性能。用工程常用的活性掺合料硅粉作平行试验进行对比,探讨煅烧煤系高岭土细粉代替硅粉用作混凝土活性矿物掺合料的可行性。试验结果表明,经700 ℃热处理得到的煅烧煤系高岭土具有相当高的水化活性,当掺量同为10%时,掺煅烧煤系高岭土混凝土具有良好的力学性能和耐久性能,而且其对混凝土抗折性能的增强效果优于硅粉。

关键词: 煅烧高岭土, 煤系高岭土, 硅粉, 混凝土

Abstract: The mechanical properties and duribility of C50 high performance concrete which was prepared by equal quantity of calcined kaolin from coal bearing strata to replace of cement with the same proportion has been studied systematically. Then parallel tests are compared with active admixture silica fume that is commonly used in projects. The comparison showed that the calcined kaolin can acquire high hydration activity after calcined at 700 ℃. When cement was replaced with 10% admixture, the metakaolin concrete obtains excellent mechanical properties as well as duribility. Moreover, the metakaolin has a better effect on bending strength of concrete than that of silica fume.

Key words: Calcined kaolin, Coal kaolin, Silica fume, Concrete