纳米级二氧化硅的掺量对高性能混凝土性能影响试验研究  

EXPERIMENTAL STUDY OF EFFECT OF NANO-SiO_2 CONTENT ON THE PROPERTIES OF HIGH PERFORMANCE CONCRETE

作　　者：陈安生 唐小萍 王四清 何小巧 

机构地区：[1]湖南高速铁路职业技术学院,湖南衡阳421001 [2]中房集团衡阳房地产开发公司,湖南衡阳421001

出　　处：《工业建筑》2014年第7期102-105,共4页Industrial Construction

基　　金：湖南省科技厅科研计划项目(2010GK3148);湖南省教育厅科研计划项目(10CO159)

摘　　要：用纳米SiO2等量替换水泥配制高性能混凝土，测试不同纳米SiO2掺量混凝土试件的性能变化。试验结果表明：纳米SiO2会降低混凝土的工作性；混凝土7 d龄期立方体抗压强度随纳米SiO2掺量增加而明显增加，28 d龄期抗压强度、弹性模量随纳米SiO2掺量的增加均呈先增加后降低的变化趋势，最大值位于纳米SiO2掺量为2％～3％内，增加幅度分别为10％和11％；混凝土的抗渗性能随纳米SiO2掺入量的增加而提高，并且后期抗渗性的增量也非常明显。Cement was replaced by the same amount of nano-SiO2 to prepare high performance concrete , it was tested the performance changes of concrete specimens in different admixture amounts of nano -SiO2 .The results show that nano-SiO2 would reduce the workability of concrete .Cube compressive strength of concrete in 7 d was markedly increased with the increase of the admixture amounts of nano-SiO2 .Compressive strength and elastic modulus in 28 d were first increased with the increase of the admixture amounts of nano-SiO2 then decreased , the maximum value was got when the admixture amounts nano-SiO2 was in the range of 2%to 3%, with the increasing range being 10%and 11%respectively .The impervious performance of concrete was improved with the increasing of the admixture amounts of nano-SiO2 , and the increment of the impervious performance was also obvious in late period .

关 键 词：纳米SIO2 掺量 高性能混凝土 影响 

分 类 号：TU528[建筑科学—建筑技术科学]