硅微粉用量对有机硅塑性嵌缝密封材料性能的影响  

Effect of silica micro‑powder dosage on the performance of organosilicon plastic joint sealing materials

作　　者：张志伟 田新伟 姚明[2] 邢珊珊 谢刚 张均 ZHANG ZhiWei;TIAN XinWei;YAO Ming;XING ShanShan;XIE Gang;ZHANG Jun(Liaoning Qingyuan Pumped Storage Power Station Co.,Ltd,Fushun 315105;College of Materials Science and Engineering,Beijing University of Chemical Technology,Beijing 100029;Power China Beijing Engineering Co.,Ltd,Beijing 100024;High-tech Research Institute,Beijing University of Chemical Technology,Beijing 100029,China)

机构地区：[1]辽宁清原抽水蓄能电站有限公司,抚顺315105 [2]北京化工大学材料科学与工程学院,北京100029 [3]中国电建集团北京勘测设计研究院有限公司,北京100024 [4]北京化工大学高新技术研究院,北京100029

出　　处：《北京化工大学学报(自然科学版)》2025年第2期41-46,共6页Journal of Beijing University of Chemical Technology(Natural Science Edition)

摘　　要：为满足严寒区混凝土面板接缝止水密封的要求,以有机硅树脂为基材制备了具有良好耐低温性能的有机硅塑性嵌缝密封材料,并研究了硅微粉用量对有机硅塑性嵌缝密封材料性能的影响。结果表明:当硅微粉质量为550份(以硅橡胶100份为基准)时,有机硅塑性嵌缝密封材料综合性能最好,流动止水长度为165 mm,下垂度为1.3 mm;-40℃时的针入度大于200(0.1 mm),断裂伸长率大于1000%,并且拉伸过程中与混凝土界面未发生黏结破坏。该材料的成功制备解决了传统材料在-40℃条件下发生硬化的难题,为国内外高寒区混凝土面板坝的建设提供了关键性的接缝止水密封材料。In order to meet the sealing requirements for the joints in concrete panels in severely cold areas,we have developed an organosilicon plastic joint sealing material with excellent low-temperature resistance,using sili-cone resin as the raw material.The effect of silica micro-powder dosage on the performance of the organosilicon plastic joint sealing material was studied.The organosilicon plastic joint sealing material had the best comprehen-sive performance when the silica micro-powder dosage was 550 parts(based on 100 parts of silicone rubber).The material showed a flow-stopping length of 165 mm and a sagging degree of 1.3 mm.At a temperature of-40℃,the material exhibited a pinning degree greater than 200(0.1 mm)and an elongation at break larger than 1000%.Importantly,no bond failure at the interface with the concrete was observed during the stretching process.The preparation of this material solves the problem of traditional materials hardening at-40℃and provides-a new joint stopping and sealing material for the construction of concrete panel dams in alpine areas,both domestically and internationally.

关 键 词：硅微粉 有机硅 面板坝 用量 密封 

分 类 号：TV442[水利工程—水工结构工程]