摘要
以高流动性的芳香胺(H-113)为主固化剂,聚酰胺树脂(PA)为辅助固化剂及增韧组分,经硅烷偶联剂(KH-792)表面改性的高活性石墨烯(MGE)为触变组分,以硅微粉、纳米碳酸钙及短切碳纤维为增稠及增强组分,制备了一种在高温环境下仍保持较长的施工适用期,并兼具触变性、高强度、刚性及一定韧性的高性能环氧树脂(EP)结构胶。研究结果表明:该结构胶的适用期为80 min,1 d压缩强度为65 MPa,14 d压缩强度为84 MPa,14 d拉伸强度为32 MPa,14 d剪切强度为17 MPa,且其与混凝土界面的14 d正拉粘接强度为5.6 MPa(界面破坏形式为混凝土内聚破坏),可完全满足GB 50728—2011标准中的指标要求。
Using high fluidity aromatic amine(H-113)as main curing agent,polyamide resin(PA)as auxiliary curing agent and toughening component,highly active graphene(MGE)modified by silane coupling agent(KH-792)as thixotropic component,silicon powder,nano calcium carbonate and chopped carbon fiber as thickeningandreinforcingcomponents,akindofhighperformanceepoxyresin(EP)structuraladhesivewasprepared,which could maintain long application pot life in high temperature environment,and had thixotropy,high strength,rigidity and certain toughness.The research results showed that the pot life of the structural adhesive was 80 min,the 1 d compressive strength was 65 MPa,the 14 d compressive strength was 84 MPa,the 14 d tensile strength was32 MPa,the 14 d shear strength was 17 MPa,and the 14 d normal tensile bonding strength of the interface with concrete was 5.6 MPa(the interface failure mode was concrete cohesive failure),which could fully meet the index requirements of GB 50728—2011 standard.
作者
谢开仲
何俊泓
Xie Kaizhong;He Junhong(College of Civil and Architectural Engineering,Guangxi University,Nanning 530004,Guangxi,China;Key Laboratory of Engineering Disaster Prevention and Structural Safety,Ministry of Education,Guangxi University,Nanning 530004,Guangxi,China)
出处
《中国胶粘剂》
CAS
2021年第2期14-19,34,共7页
China Adhesives
基金
国家自然科学基金重点项目(51738004)
国家自然科学基金项目(51868007,51368005,51878186)
广西科技计划项目(桂科AD17195096)
四川省科技计划项目(2018GZ0052)
广西大学科学研究基金项目(XBZ100762)。
关键词
环氧树脂
结构胶
流挂性能
力学性能
粘接性能
epoxy resin
structural adhesive
sagging performance
mechanical property
bonding performance
作者简介
谢开仲(1974-),广东河源人,教授,主要从事大跨度桥梁施工控制与工程抗震等研究。E-mail:xiekaizhong@163.com;通信作者:何俊泓。E-mail:gxu_hjh@l63.com。
