摘要
建筑外墙的饰面砖板一旦脱离混凝土墙面,会对过路行人安全造成极大的威胁,因此对建筑混凝土胶粘剂性能有着较高的要求。以环氧树脂为基料,在其中添加各种改性材料,制备成建筑混凝土胶粘剂。利用胶粘剂将混凝土块与瓷砖相粘接,制成试件。在高冷、高热、高湿三种工况下,测试试件的粘接强度、剥离强度、剪切强度以及冲击强度,完成性能分析。结果表明:随着温度的逐渐降低,试件粘接强度、冲击强度和剥离强度呈现先逐渐下降再剧烈下降的趋势,而剪切强度则没有出现较大的变化。随着温度的升高,在160℃以下粘接强度、剥离强度、剪切强度和冲击强度均没有出现较大的变化,但是在160℃及160℃以上,四个性能指标急速下降。随着湿度的升高,建筑混凝土胶粘剂性能的粘接强度、剥离强度和剪切强度前期逐渐下降,后期大幅度下降,冲击强度则没有出现较大幅度变化。
Once the facing brick of the external wall of a building is separated from the concrete wall,it will pose a great threat to the safety of passers-by.Thus,there are higher requirements for the performance of building concrete adhesive.The epoxy resin is used as the base material,and various modifiers are added into it to prepare a kind of building concrete adhesive.The concrete block is bonded to the ceramic tile with the prepared adhesive to make the test piece.Under the three working conditions of extremely cold,high heat and high humidity,the adhesion strength,peel strength,shear strength and impact strength of the specimen are tested,and the performance analysis is completed.The results show that the adhesion strength,impact strength and peel strength of the specimens decrease gradually and then sharply with the lowering temperature,while the shear strength does not change greatly.With the rising temperature,the adhesion strength,peel strength,shear strength and impact strength does not change significantly below 160℃,but the four performance indexes decrease rapidly at 160℃or higher.With the increase of humidity,the adhesion strength,peel strength and shear strength of building concrete adhesive gradually decrease in the early stage and significantly decrease in the later stage.The impact strength does not change significantly.
作者
邓正云
谭占进
张建
戴勇
唐瑞
DENG Zhengyun;TAN Zhanjin;ZHANG Jian;DAI Yong;TANG Rui(Building Construction Company of China Railway No.5 Engineering Group Co.,Ltd.,Guiyang 550081,China;Shenzhen Metro Group Co.,Ltd.,Shenzhen 518031,China;College of Civil and Transportation Engineering,Shenzhen University,Shenzhen 518060,China)
出处
《化学与粘合》
CAS
2023年第2期124-127,154,共5页
Chemistry and Adhesion
基金
高速铁路轨道技术国家重点实验室开放基金项目(编号:2021YJ114)。
关键词
混凝土
胶粘剂
制备
性能
concrete
adhesive
preparation
performance
