期刊
CEMENT & CONCRETE COMPOSITES
卷 32, 期 2, 页码 110-115出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.cemconcomp.2009.10.007
关键词
Carbon nanotubes; Mechanical properties; Nanoindentation; Autogenous shrinkage; Nano-fiber reinforcement
资金
- Infrastructure Technology Institute at Northwestern University [DTRT06-C-0015/M1]
Due to their exceptional mechanical properties, carbon nanotubes (CNTs) are considered to be one of the most promising reinforcing materials for the next generation of high-performance nanocomposites. In this study, the reinforcing effect of highly dispersed multiwall carbon nanotubes (MWCNTs) in cement paste matrix has been investigated. The MWCNTs were effectively dispersed in the mixing water by using a simple, one step method utilizing ultrasonic energy and a commercially available surfactant. A detailed study on the effects of MWCNTs concentration and aspect ratio was conducted. The excellent reinforcing capabilities of the MWCNTs are demonstrated by the enhanced fracture resistance properties of the cementitious matrix. Additionally, nanoindentation results suggest that the use of MWCNTs can increase the amount of high stiffness C-S-H and decrease the porosity. Besides the benefits of the reinforcing effect, autogenous shrinkage test results indicate that MWCNTs can also have a beneficial effect on the early strain capacity of the cementitious Matrix, improving this way the early age and long term durability of the cementitious nanocomposites. (C) 2009 Elsevier Ltd. All rights reserved.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据