高温对装配式建筑外墙接缝密封胶性能的影响  

Effect of High Temperature on the Performance of Joint Sealant for Fabricated Exterior Walls

作　　者：朱浩 王晶晶[1] ZHU Hao;WANG Jing-jing(The Second Affiliated Hospital of Suzhou University,Suzhou 215000,China)

机构地区：[1]苏州大学附属第二医院,江苏苏州215000

出　　处：《液压气动与密封》2023年第5期55-59,共5页Hydraulics Pneumatics & Seals

基　　金：2021年度江苏省高校重点科研项目(2021GKT SCX013)。

摘　　要：为分析装配式建筑外墙接缝密封胶在高温环境中的性能,以基础树脂、增塑剂为主原料,结合MS专用黑色母料等多种辅原料制备MS密封胶,用制备的密封胶密封2块装配式混凝土外墙板试样,并在热老化和紫外线老化两种条件下设定不同的温度,测试密封胶的性能。试验结果显示:在两种条件下,温度由16℃上升20℃又达到40℃的过程中,拉伸强度由0.544 MPa上升至0.572 MPa又下降至0.537 MPa;其中,温度为20℃时,拉伸强度最佳;同时,随着温度的逐渐增加,密封胶断裂伸长率及粘结强度逐渐下降;密封后的外墙接缝试样在两种条件下随着温度的逐渐增加,防水性能逐渐下降,当温度达到超高温140℃时,防水性能几乎完全丧失,在温度为80℃内时,可保证较好的防水性,满足日常生活需求。In order to analyze the performance of the joint sealant for fabricated building exterior wall in the high temperature environment,the MS sealant is prepared with basic resin and plasticizer as the main raw materials,combined with a variety of auxiliary materials such as special black masterbatch for MS,and 2 samples of fabricated concrete exterior wall panels are sealed with the prepared sealant.The performance of the sealant is tested by setting different temperatures under the conditions of thermal aging and ultraviolet aging.The test results show that under two conditions,the tensile strength increases from 0.544 MPa to 0.572 MPa and then decreases to 0.537 MPa when the temperature rises from 60℃to 100℃and reaches 140℃;The tensile strength is the best when the temperature is 100℃;At the same time,with the increase of temperature,the elongation at break and bond strength of sealant decreased gradually;The waterproof performance of the sealed exterior wall joint sample decreases gradually with the temperature increasing under two conditions.When the temperature reaches 140℃,the waterproof performance is almost completely lost,and when the temperature is 80℃,it can ensure good waterproof performance.

关 键 词：装配式 建筑外墙 接缝密封胶 性能 

分 类 号：TB42[一般工业技术] TQ638[化学工程—精细化工]