建筑地下钢框架结构中改性环氧树脂胶加固性能的研究  

Study on reinforcement performance of modified epoxy resin adhesive in underground steel frame structure of building

作　　者：赵红梅 张世聘 Zhao Hongmei;Zhang Shipin(China Nuclear Industry Huawei Engineering Design and Research Co.,Ltd.,Nanjing 210000,Jiangsu,China)

机构地区：[1]中核华纬工程设计研究有限公司,江苏南京210000

出　　处：《中国胶粘剂》2023年第5期34-39,45,共7页China Adhesives

基　　金：江苏省科技项目(Z215015001)。

摘　　要：以环氧树脂、固化物、促进剂、填料和偶联剂等作为主要配制材料,以不同种类或含量混合,利用自制氧化石墨烯改性环氧树脂胶,制备建筑加固用复合环氧树脂胶。制备45#钢片试件,分别测试涂抹有胶粘剂的试件的力学指标、凝胶时间等指标,并分析不同配比的环氧树脂胶在建筑地下钢框架结构中加固作用。研究结果表明:选择主树脂E-51有助于环氧树脂胶拉伸、弯曲、压缩强度的提升,其与固化剂以75∶100的质量比混合时,环氧树脂胶的抗拉伸性能最佳;当固化剂、促进剂、填料的质量添加量分别为30%、4%和80%,并以KH-570为偶联剂时,能够有效改善环氧树脂胶的力学性能;加入质量分数为2.0%的氧化石墨烯后,复合环氧树脂胶的拉伸强度、断裂伸长率指标值最大;潮湿环境下,复合环氧树脂胶需约65 h可完全固化,剪切粘接强度稳定在20 MPa。The composite epoxy resin adhesive for building reinforcement was prepared with epoxy resin,curing compound,accelerator,filler and coupling agent as main preparation materials,mixed with different kinds or contents of them,and modified by self-made graphene oxide.45#steel sheet specimen was prepared,and the mechanical indexes,gel time and other indexes of the specimen coated with adhesive were tested respectively,and the reinforcement effect of epoxy resin adhesive with different proportions in the underground steel frame structure of building was analyzed.The research results showed that the tensile,flexural and compressive strength of epoxy resin adhesive could be improved by selecting E-51 as main resin,and the tensile resistance of epoxy resin adhesive was the best when it was mixed with curing agent at the mass ratio of 75∶100.The mechanical properties of epoxy resin adhesive could be improved effectively when the mass addition amounts of curing agent,accelerator and filler were 30%,4%and 80%respectively,and KH-570 was used as coupling agent.After adding 2.0%graphene oxide,the tensile strength and elongation at break of composite epoxy resin adhesive reached the maximum.In the humid environment,the composite epoxy resin adhesive could be fully cured after about 65 hours,and the shear bonding strength was stable at 20 MPa.

关 键 词：环氧树脂胶 钢框架 加固作用 氧化石墨烯 抗拉伸性能 剪切粘接强度 

分 类 号：TQ433.43[化学工程]