混凝土加固施工中的环氧树脂胶改性及效果研究  

Modification and effect study of epoxy resin adhesive for concrete reinforcement in construction

作　　者：陈蓉[1] 杜祝遥 孙虎[1] CHEN Rong;DU Zhuyao;SUN Hu(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》2024年第1期44-48,共5页Adhesion

基　　金：陕西省教育厅自然科学研究项目(项目编号:23JK0319);陕西国防工业职业技术学院课题(项目编号:Gfy23-22)。

摘　　要：针对传统混凝土施工中环氧树脂胶质脆韧性不足和高温易流挂的问题,提出通过气相白炭黑(MSD)对传统环氧树脂结构胶进行改性。试验结果表明,在酚醛胺固化剂T-31掺量为15%,聚酰胺固化剂PA掺量为40%,硅烷偶联剂KH-792的掺量为3%,超细石英砂掺量为40%,纳米碳酸钙掺量为20%,MSD掺量为3%;短切碳纤维掺量为6%配比下制备的结构胶性能最佳。14 d压缩强度、拉伸强度、正拉粘接强度和拉伸抗拉强度分别为81、34、5.5和18.5 MPa。表现出良好的阻裂粘接性能,可以在桥梁混凝土加固中发挥重要作用。To address the problem of insufficient brittleness and toughness,as well as high temperature prone sagging in the construction process of traditional epoxy resin adhesive,a modification of traditional epoxy resin structural adhesive by gas phase silica(MSD)was proposed.The results showed that the structural adhesive prepared with the ratio of phenolic amine curing agent T-3115%,polyamide curing agent PA 40%,silane coupling agent KH-7923%,ultrafine quartz sand 40%,nano calcium carbonate 20%,MSD 3%,and short-cut carbon fiber 6%had the best performance.The 14 d compressive strength,tensile strength,normal pull bond strength and tensile bond strength were 81,34,5.5 and 18.5 MPa respectively.It shows good crack resistance and bonding performance,and can play an important role in bridge concrete reinforcement.

关 键 词：环氧树脂基结构胶 混凝土加固 三点弯曲试验 加固效果 

分 类 号：TQ437[化学工程]