Materials Reports 2021, Vol. 35 Issue (z2): 638-641 |
POLYMERS AND POLYMER MATRIX COMPOSITES |
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Effect of Cutting Aramid Fiber Content on Strength and Pore Structure of Cement-based Composites |
LI Zixuan, LI Dihong, BIAN Libo, FENG Yuchen, ZHANG Yaqing, YU Haiyang
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College of Civil and Transportation Engineering, Beijing University of Civil Engineering and Architecture, Beijing 102616, China |
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Abstract The effects of chopped aramid fibers with different lengths on the flexural strength, compressive strength and microscopic pore structure of cement-based composites were studied in this paper. The results show that the quasi-static mechanical properties (flexural strength and compressive strength) of cement-based composites are significantly improved by adding chopped aramid fiber. The flexural strength of fibers with length of 1 mm and 3 mm reaches the peak when the content of fibers is 10 vol% and 2vol%, respectively. The compressive strength of the specimen increases first and then decreases with the increase of fiber content. In addition, with the change of the content of aramid fiber, the gel pore content and the effect of refining pore structure of the specimen are consistent with the increase and decrease of the flexural strength and compressive strength.
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Published: 09 December 2021
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About author:: Zixuan Li, 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. |
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