Preparation of carbon nanotubes solution and its effectson mechanical properties of cement mortar

被引：4
作者：
机构：
[1] School of Materials Science and Engineering, Southeast University
[2] School of Civil Engineering, Shandong Jianzhu University
[3] Licheng Supervision Station, Jinan Construction Project Quality Supervision Station
来源：
Sun, W. (sunwei@seu.edu.cn) | 1600年 / Southeast University卷 / 44期
关键词：
Carbon nanotubes; Cement mortar; Mechanical property; Microstructure; Water-borne dispersion;
D O I：
10.3969/j.issn.1001-0505.2014.03.037
中图分类号：
学科分类号：
摘要：
In order to study the effects of carbon nanotubes (CNTs) and their dispersion on the performance of cement mortars, the aqueous dispersions of carbon nanotubes are prepared using polyvinylpyrrolidone (PVP) and sodium dodecyl benzene sulfonate (SDBS) as dispersant, respectively, and their influences on the mechanical and microstructural properties of cement mortars are studied. The experimental results show that dispersant can significantly affect the dispersion of carbon nanotubes in water. Compared with SDBS as dispersant, the CNTs solution with PVP as dispersant has more uniform dispersion and higher stability. In addition, highly dispersed carbon nanotubes can densify paste microstructure and improve cement mortar's mechanical properties as well. 0.5% addition of CNTs can improve the flexural and compressive strength of cement mortars at 28 d by 49.4% and 40.8%, respectively.
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页码：662 / 667
页数：5
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