硅烷修饰功能性骨料增韧改性环氧树脂砂浆材料研究与应用  

Research and Application of Silane-Modified Functional Aggregate Toughening Modified Epoxy Resin Mortar Materials

作　　者：张扬 于心然[2] 孙赋成 高兆东[4] 徐冰雷 Zhang Yang;Yu Xinran;Sun Fucheng

机构地区：[1]江苏宿淮盐高速公路管理有限公司,江苏淮安223001 [2]江苏宁宿徐高速公路有限公司,江苏宿迁224800 [3]江苏宁靖盐高速公路有限公司,江苏泰州225300 [4]江苏京沪高速公路有限公司,江苏淮安223001

出　　处：《江苏建材》2024年第6期20-23,共4页Jiangsu Building Materials

摘　　要：采用硅烷偶联剂KH550改性石英骨料,FTIR结果证实KH550分子结合可在石英颗粒表面。再分别使用石英骨料(QP)和硅烷表面修饰后的石英骨料(TQP)制备环氧树脂复合材料。在粘度曲线中可知填充TQP的混合胶具有更明显的剪切稀化特性。拉伸强度和断裂伸长率特性表明,当填料/树脂增加时,填充TQP的样品具有更高的强度和伸长率保持率。抗压强度测试进一步证实了KH550官能团对体系的积极作用效果。此外,冲击强度随着填料(TQP)/树脂的增加而提高,而随着QP的增加,冲击强度明显降低。在SEM显微照片中,在含有TQP的体系中还可以观察到更多的应力发白现象,表明良好的应力分散效果。将改性后的环氧材料制备成环氧砂浆材料,用于高速公路防撞墙开裂、鼓包、露筋等混凝土缺陷修复,综合应用效果良好。The quartz aggregate was modified with the silane coupling agent KH550,and the FTIR results confirmed that KH550 molecules could be bound on the surface of quartz particles.Then,quartz aggregate(QP)and silane surface modified quartz aggregate(TQP)were used to prepare epoxy resin composites.In the viscosity curve,it can be seen that the TQP-filled blend has more pronounced shear thinning characteristics.The tensile strength and elongation at break showed that TQP-filled samples had higher strength and elongation retention when the filler/resin increased.The compressive strength test further confirmed the positive effect of KH550 functional groups on the system.In addition,the impact strength increases with the increase of filler(TQP)/resin,while the impact strength decreases significantly with the increase of QP.In the SEM micrograph,more stress whitening can be observed in the TQP-containing system,indicating a good stress dispersion effect.The modified epoxy material system was prepared into epoxy mortar material,which was used for the repair of concrete defects such as cracking,bulging and exposed ribs of highway crash walls,and the comprehensive application effect was good.

关 键 词：环氧树脂 表面处理 复合材料 增韧改性 环氧砂浆 

分 类 号：O633.13[理学—高分子化学]