加固钢板梁用的改性环氧树脂胶粘剂性能研究  

Study on the performance of epoxy resin adhesives for steel palte beam reinforcement

作　　者：陈蓉[1] 杜祝遥 CHEN Rong;DU Zhuyao(Shaanxi Institute of Technology,Xi’an 710300,China)

机构地区：[1]陕西国防工业职业技术学院,陕西西安710300

出　　处：《粘接》2023年第10期6-10,共5页Adhesion

基　　金：陕西省科技厅自然科学一般项目(项目编号:2021JQ-899);陕西国防工业职业技术学院一般项目(项目编号:Gfy23-43)。

摘　　要：针对目前市售桥梁加固环氧树脂胶粘剂存放条件和施工条件较为严苛的问题,提出一种新型环氧树脂胶粘剂的制备。对胶粘剂配比进行了优化,对优化后胶粘剂粘接性能进行了研究。结果表明:在固化剂以缩胺105与聚醚胺复配比为1∶2,纳米二氧化硅掺量为1.0%的条件下,制备的环氧树脂胶粘剂拉伸强度约为45.2 MPa,应变能约为0.117 N·mm。与市售环氧树脂胶粘剂对比,切线法、损耗模量法和损耗因子法对应的玻璃转化温度分别为66.1、68.9和80.1℃,明显高于市售商品胶粘剂玻璃转化温度,满足胶粘剂用于桥梁钢板时的耐温要求。对常用粘接方式进行研究,粘接方式和制备的环氧树脂胶粘剂不对钢板本身的剪切强度产生影响,只对钢板间长度和宽度方向抗剪强度产生影响。Aiming at the severe storage and construction conditions of epoxy resin adhesives for bridge reinforcement currently available in the market,a new type of epoxy resin adhesive was prepared.The experiment first optimized the adhesive ratio,and then studied the adhesive performance of the optimized adhesive.The experimental results show that the tensile strength and strain energy of the epoxy resin adhesive prepared under the condition of a 1∶2 mixture of amine 105 and polyether amine curing agent and a suitable content of 1.0 wt% nano-silica are about 45.2 MPa and 0.117 N·mm,respectively.Compared with commercially available epoxy resin adhesives,the glass transition temperatures corresponding to the tangent method,loss modulus method,and loss factor method are 66.1 ℃,68.9 ℃,and 80.1 ℃,respectively,which are significantly higher than those of commercially available adhesives,meeting the temperature resistance requirements of adhesives used for bridge steel plates.The commonly used bonding methods were studied.The bonding method and the prepared epoxy resin adhesive did not affect the shear strength of the steel plate itself,but only the shear strength in the length and width directions between the steel plates.

关 键 词：环氧树脂胶粘剂 桥梁加固 粘接性能 加固方式 

分 类 号：TQ433.437[化学工程]