纤维珠链在混凝土抗裂性能设计中的应用研究

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Abstract Because of early drying shrinkage and freeze-thaw damage, harmful cracks of concrete will occur, which will affect the strength and durability of reinforced concrete. Epoxy resin is dripped onto the fibers, fibers will become bead chains after the resin is coagulated into beads,and then it becomes short cut fiber through fiber cutting machine. Finally, Fiber bead chain concrete is made by adding fibre bead chain into concrete in mixing process. Through the finite element simulation, it is found that the fiber bead chain concrete relies on the structural embedment between beads and concrete to alleviate the stress concentration. The shear stress between fiber and concrete is basically reduced to 0 MPa, the fiber slip is restricted. Material performance experiments show that when the content of fiber bead chain is 0.5 kg/m³ and the content of reinforced fiber is 3 kg/m³, the concrete mechanical properties and durability are improved, the number of cracks is reduced by 93%, and the length of cracks is shortened by 57%. Therefore fiber bead chain has feasibility and practicability in concrete anti-cracking design.

Key words： fiber bead chain finite element simulation material performance experiments mechanical properties durability crack resistance

Published: 01 July 2020

CLC number:

TB332

About author:: Haoyu Wu received his M. E. degree in engineering from Beijing University of Civil Engineering and Architecture in June 2018. Now, he is staff of State grid economic and technological research institute Co., Ltd., and works under the guidance of director Peihong Wu. Work area: Substation civil structure design, Research area: Fiber composite materials ; Peihong Wu graduated from Wuhan Polytechnic University majoring in industrial and civil construction. She has qualifications for National Registered Structural Engineer and National Registered Engineering Consul-tants. She acquired the honor of power supply and distribution design expert in Electric Power Survey and design industry, State Grid Beijing Electric Power Company “Excellent Experts at Provincial Company Level” and top ten employees of economic and technological research institute Co., Ltd. Now she is the Chief Engineer of the Civil Engineering Department of the Economic and Technological Research Institute Co., Ltd. Design Center. She presided over and participated in a series of large-scale substation projects, she participated in the compilation of “urban indoor substation design”, “underground substation design technology” and other books ; Libo Bian, received his Ph.D.degree in engineering from Beijing University of Science and Technology in June 2016. Now, he is 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 mate-rials. Authorized/applied for 16 invention patents, 7 utility models, and published more than 20 related papers.

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	WU Haoyu
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Cite this article:

WU Haoyu,WU Peihong,BIAN Libo, et al. Application of Fiber Bead Chain in Crack Resistance Design of Concrete[J]. Materials Reports, 2020, 34(Z1): 193-198.

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http://www.mater-rep.com/EN/ OR http://www.mater-rep.com/EN/Y2020/V34/IZ1/193