Effect of Carbon Nanotubes' Diameter on Freeze-Thaw Resistance of Cement Paste

被引：7
作者：
Tian, Wei [1 ]
Gao, Fangfang [1 ]
机构：
[1] Changan Univ, Sch Civil Engn, Xian, Peoples R China
来源：
JOURNAL OF MECHANICS | 2020年 / 36卷 / 04期
基金：
中国国家自然科学基金; 美国国家科学基金会;
关键词：
MWCNTs; Mechanical properties; Freeze-thaw cycles; Pore structure; MECHANICAL-PROPERTIES; DISPERSION; COMPOSITES; BEHAVIOR; MICROSTRUCTURE; FIBERS; REINFORCEMENT; DURABILITY; TOUGHNESS; MATRIX;
D O I：
10.1017/jmech.2020.6
中图分类号：
O3 [力学];
学科分类号：
08 ; 0801 ;
摘要：
This paper aims to investigate the freeze-thaw resistance of cement-paste containing with different diameter and content of multiwalled carbon nanotubes (MWCNTs) in terms of mechanical properties and microstructure. Three groups of cement-paste with MWCNTs diameter of 10-20 nm, 20-40 nm and 40-60 nm were prepared by incorporating 0.1 wt%, 0.2 wt%, 0.3 wt%, 0.4 wt%, 0.5 wt% MWCNTs by cement weight. Experimental results showed that the addition of 0.1 wt% MWCNTs with diameters of 10-20 nm effectively improved the freeze-thaw resistance of cement-paste. In addition, microstructural analysis of these cement-paste specimens showed that MWCNTs addition increased the materials' initial porosity, but a proper amount of MWCNTs decreased the porosity of cement-paste after freeze-thaw cycles and effectively improved the pore size distribution. MWCNTs 10-20 nm in diameter were found to be the optimal size for improving the microstructure of these MWCNTs cement-paste
引用
收藏
页码：437 / 449
页数：13
相关论文
共 37 条
[1]   Clay/carbon nanotube hybrid mixture to reduce the electrical percolation threshold of polymer nanocomposites [J].
Al-Saleh, Mohammed H. .
COMPOSITES SCIENCE AND TECHNOLOGY, 2017, 149 :34-40
[2]   Fire resistance and mechanical properties of carbon nanotubes - clay bricks wastes (Homra) composites cement [J].
Amin, M. S. ;
El-Gamal, S. M. A. ;
Hashem, F. S. .
CONSTRUCTION AND BUILDING MATERIALS, 2015, 98 :237-249
[3]   Cement-based sensors with carbon fibers and carbon nanotubes for piezoresistive sensing [J].
Azhari, Faezeh ;
Banthia, Nemkumar .
CEMENT & CONCRETE COMPOSITES, 2012, 34 (07) :866-873
[4]  
[曹明莉 Cao Mingli], 2015, [硅酸盐学报, Journal of the Chinese Ceramic Society], V43, P632
[5]   Microscopic reinforcement for cement based composite materials [J].
Cao, Mingli ;
Zhang, Cong ;
Wei, Jianqiang .
CONSTRUCTION AND BUILDING MATERIALS, 2013, 40 :14-25
[6]   Durability of multi-walled carbon nanotube reinforced concrete [J].
Carrico, A. ;
Bogas, J. A. ;
Hawreen, A. ;
Guedes, M. .
CONSTRUCTION AND BUILDING MATERIALS, 2018, 164 :121-133
[7]   Development of Carbon Nanotube Modified Cement Paste with Microencapsulated Phase-Change Material for Structural-Functional Integrated Application [J].
Cui, Hongzhi ;
Yang, Shuqing ;
Memon, Shazim Ali .
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES, 2015, 16 (04) :8027-8039
[8]   Dispersion of carbon fibers in cement-based composites with different mixing methods [J].
Gao, Jie ;
Wang, Zhenjun ;
Zhang, Ting ;
Zhou, Liang .
CONSTRUCTION AND BUILDING MATERIALS, 2017, 134 :220-227
[9]   Mechanical properties and mechanisms of fiber reinforced fly ash-steel slag based geopolymer mortar [J].
Guo, Xiaolu ;
Pan, Xuejiao .
CONSTRUCTION AND BUILDING MATERIALS, 2018, 179 :633-641
[10]   Fracture toughness enhancement of cement paste with multi-walled carbon nanotubes [J].
Hu, Yu ;
Luo, Danni ;
Li, Penghui ;
Li, Qingbin ;
Sun, Guoqiang .
CONSTRUCTION AND BUILDING MATERIALS, 2014, 70 :332-338
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