Ultraductile waterborne epoxy-concrete composite repair material: Epoxy-fiber synergistic effect on flexural and tensile performance

doi:10.1016/j.cemconcomp.2022.104463

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	Ultraductile waterborne epoxy-concrete composite repair material: Epoxy-fiber synergistic effect on flexural and tensile performance
	Pang, Bo 1,2; Jin, Zuquan 1; Zhang, Yunsheng 2,7; Xu, Lei 3; Li, Mengyuan 1; Wang, Chencui 1; Zhang, Yu 7; Yang, Yane 7; Zhao, Peng 4; Bi, Jinxu 2
刊名	Cement and Concrete Composites
	2022-05-01
卷号	129
关键词	Brittleness Cements Compressive strength Deterioration Epoxy resins Fiber bonding Fibers Fracture mechanics Plasticity Reinforced concrete Repair Tensile strain Tensile strength Cement concrete Composite repair Concrete composites Epoxy Flexural performance Repair materials Service time Synergistic effect Tensile performance Waterborne epoxy
ISSN号	0958-9465
DOI	10.1016/j.cemconcomp.2022.104463
英文摘要	With the extension of service time, infrastructure is in growing urgency for repair and reinforcement due to its deterioration in safety and durability over the years. Normal cement concrete has shortcomings, e.g., high brittleness and low flexural-tensile strength, that fail to meet the requirements of construction repair. In this paper, a novel waterborne epoxy-concrete composite repair material (WECM) was prepared by using self-synthesized water-based epoxy resin based on the molecular structure-activity relationship. The mechanisms of waterborne epoxy (WEP) and WEP-fiber synergy on the improvement of concrete performance were clarified. The results show that the defects of high brittleness and poor ductility of concrete are significantly improved by WEP and that the ductility of WECM is increased by 300%–600% compared with the control concrete. The fiber and WEP in the WECM exhibited a synergistic effect on the tensile strength, ductility, and crack resistance of concrete in which the fiber coating layer mixed with WEP and embedded cement particles (inlay) provided fiber protection as well as an interfacial bonding enhancement. The P/C of 0.2 is the turning point of the flexural and tensile strength of the WECM, which is related to the continuous phase formation of the WEP-interpenetrating polymer network (WEP-IPN). © 2022
WOS研究方向	Construction & Building Technology ; Materials Science
语种	英语
出版者	Elsevier Ltd
WOS记录号	WOS:000806203100003
内容类型	期刊论文
源URL	[http://ir.lut.edu.cn/handle/2XXMBERH/157851]
专题	兰州理工大学
作者单位	1.Department of Civil Engineering, Qingdao University of Technology, Qingdao; 266033, China; 2.School of Materials Science and Engineering, Southeast University, Nanjing; 211189, China; 3.Qingdao Institute of Marine Geology, China Geological Survey, Qingdao; 266071, China; 4.School of Civil Engineering and Architecture, University of Jinan, Jinan; 250024, China; 5.School of Architecture, Southeast University, Nanjing; 211189, China; 6.School of Civil Engineering, Suzhou University of Science and Technology, Suzhou; 215011, China; 7.College of Civil Engineering, Lanzhou University of Technology, Lanzhou; 730050, China
推荐引用方式 GB/T 7714	Pang, Bo,Jin, Zuquan,Zhang, Yunsheng,et al. Ultraductile waterborne epoxy-concrete composite repair material: Epoxy-fiber synergistic effect on flexural and tensile performance[J]. Cement and Concrete Composites,2022,129.
APA	Pang, Bo.,Jin, Zuquan.,Zhang, Yunsheng.,Xu, Lei.,Li, Mengyuan.,...&Song, Xiaoyun.(2022).Ultraductile waterborne epoxy-concrete composite repair material: Epoxy-fiber synergistic effect on flexural and tensile performance.Cement and Concrete Composites,129.
MLA	Pang, Bo,et al."Ultraductile waterborne epoxy-concrete composite repair material: Epoxy-fiber synergistic effect on flexural and tensile performance".Cement and Concrete Composites 129(2022).