碳纳米管对混凝土性能的影响研究  

Influence of Carbon Nanotubes on the Properties of Concrete

作　　者：王建雷[1] 赵云里 和晓博 胡佳星[1] 刘辉 赵晋津[1] 任书霞[1] 

机构地区：[1]石家庄铁道大学材料科学与工程学院,石家庄050043 [2]中铁十九局集团有限公司,哈佳铁路项目部,哈尔滨150000 [3]河北军存预拌混凝土有限公司,石家庄050000

出　　处：《硅酸盐通报》2016年第7期2193-2197,共5页Bulletin of the Chinese Ceramic Society

基　　金：河北省自然科学基金(E201210014);校企联合横向项目(20141230000001)

摘　　要：近年来,将混凝土作为一种复杂的电化学体系研究其电阻率是检测其结构性能的一种新的测试方法。碳纳米管具有优异的导电性,将碳纳米管加入到混凝土中预期可以改善混凝土的导电性。本文将多壁碳纳米管掺加到C40混凝土中,探讨了多壁碳纳米管对混凝土和易性、凝结时间以及电学性能的影响。试验结果表明,当碳纳米管为0.3%时,混凝土拌合物的和易性良好,且碳纳米管可以在硬化混凝土中形成良好的导电纤维网络,水泥基体形成的导电势垒较小,显著提高了混凝土导电性。本论文的研究成果可为导电混凝土研究应用提供依据。Concrete has been taken as a complex electrochemical system to study its electrical resistivity recently, which is a new method to determine its structure and performance. Due to its excellent electrical properties, it is expected that carbon nanotubes could improve the conductivity of the concrete when it was added into the concrete. In this paper, multi-walled carbon nanotubes （MWCNT） were incorporated into C40 concrete and the effects of MWCNT on workability, setting time and electrical properties of the C40 concrete were discussed. The results show that MWCNT may form a good conductive fiber network in the structure of concrete when the content is 0.3%, leading to the reduction of the conductive barrier in the whole matrix, which significantly increased electrical conductivity of the whole concrete. Our results would provide a basis for further studying and potential applications of conductive concrete.

关 键 词：碳纳米管 混凝土 电阻率 微观分析 

分 类 号：TU528[建筑科学—建筑技术科学]