Materials Reports  2021, Vol. 35 Issue (z2): 634-637 |
| POLYMERS AND POLYMER MATRIX COMPOSITES |
|
|
|
|
|
| Study on Mechanical and Impact Properties of Aramid Fiber Reinforced Cement Cementitious Composites |
| FENG Yuchen, LI Dihong, BIAN Libo, LI Zixuan, ZHANG Yaqing
|
| School of Civil and Transportation Engineering, Beijing University of Civil Engineering and Architecture, Beijing 100044, China |
|
|
|
|
Abstract Aramid fiber has the characteristics of large specific modulus, high specific strength and high toughness, which can greatly improve the properties of cement-based materials. In this paper, the effects of the length and volume dosage of short-cutaramid fiber on the flexural strength, compressive strength and impact resistance of cement-based composite were studied. The micropore structure of the specimen was studied by means of nitrogen adsorption test, and the microscopic morphology was observed by SEM. The results show that the flexure strength and compressive strength of cement-based composite at different ages increase with the increase of volume content or length of aramid fiber, and the impact resistance is excellent, more residual strength can be retained. Longer aramid fiber (6 mm) can better improve the mechanical properties of cement-based composites and refine material pore structure, which are not easy to be damaged under impact load. Too short aramid fiber (1 mm) has limited improvement on the mechanical properties and impact resistance of specimens. The cement-based composite with the length of 6 mm and fiber volume content of 4% has the best comprehensive mechanical properties and the best pore structure.
|
|
Published: 09 December 2021
|
|
|
| Fund:This work was financially supported by the National Natural Science Foundation of China (51573018). |
About author:: Yuchen Feng, postgraduate of the college of civil and traffic engineering of Beijing University of Civil Engineering and Architecture, engaged in the research of civil engineering materials. The main research direction is fiber-reinforced cement-based composites.
Libo Bian, received his Ph. D. degree in engineering from Beijing University of Science and Technology in June 2016. Now, he is an associate professor in Beijing University of Civil Engineering and Architecture. He mainly teaches the experimental courses of building material testing technology, civil engineering material and inorganic nonmetallic material engineering. He has presided over projects of Beijing Natural Science Fund, Beijing Education Commission, Key R&D technology of the Science and Technology Ministry and enterprise entrusted projects. The main research fields: multi-component composite new cementitious material technology, porous concrete technology and special and new building materia-ls. Authorized／applied for 16 invention patents, 7 utility models, and published more than 20 related papers. |
|
|
1 沈荣熹,王璋水,崔玉忠.纤维增强水泥与纤维增强混凝土, 化学工业出版社, 2005, pp. 3.
2 王维相,翁亚栋.橡胶工业,2004(7), 436.
3 李同起,王成杨.高分子材料科学与工程,2003(5),5.
4 张文彬.纺织导报,2001(5),104.
5 贺玲凤,何唯平.建筑科学,2005(6),53.
6 冯红卫,赵利媛.混凝土与水泥制品,2020(8),56.
7 Ward R J, Li V C. Elsevier Applied Science, 1989,645.
8 田颖,赵帅,李国忠,等.粉煤灰,2009,21(2),16.
9 田颖,赵帅,李国忠,等.山东交通科技,2008(4),33.
10 乔艳静,阳知乾,刘建忠, 等.混凝土,2015(1),94.
11 Walton R L, Majumdar A J, et al. Journal of Materials Science, 1978(13),1075.
12 Majumdar A J, Laws V, et al. Composites, 1979,1(10),17.
13 江世永,龚宏伟,姚未来, 等.材料导报:综述篇,2018,32(12),4192.
14 吴中伟.硅酸盐学报,1979(3),262. |
|
|
|
渝公网安备50019002502923号 © Editorial Office of Materials Reports.
