| 混凝土建筑外墙接缝密封胶的性能研究 |
| Study on Properties of Sealant for Exterior Wall Joints of Concrete Building |
| 投稿时间：2024-02-26 修订日期：2024-02-26 |
| DOI：10.12136/j.issn.1000-890X.2026.02.0122 |
| 中文关键词: 密封胶 硅烷封端聚醚 接缝 混凝土建筑外墙 耐酸碱性能 耐老化性能 |
| 英文关键词: concrete building exterior walls seam sealant acid and alkali resistance aging resistance |
| 基金项目: |
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| 摘要点击次数: 198 |
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| 中文摘要: |
| 以硅烷封端聚醚为主要原料制备密封胶并将密封胶应用于混凝土建筑外墙接缝，对其流变性能、耐酸碱性能、耐冻融性能、耐污染性能、耐老化性能和耐水性能进行研究。结果表明：随着固化时间的延长，密封胶胶片的拉伸强度先增大后趋于稳定；随着浸泡溶液pH值的增大，密封胶胶片的拉伸强度和拉断伸长率变化幅度较小，胶片具备一定的耐酸碱性能；经室外曝晒12个月后，密封胶胶片的拉断伸长率降幅为2.4%，耐老化性能良好；涂抹密封胶的混凝土建筑外墙接缝具有良好的耐冻融性能和耐污染性能；在水中浸泡时间7 d后，涂抹密封胶的混凝土建筑外墙接缝的定伸粘结性能良好，拉断伸长率不变，耐水性能良好。总之，以硅烷封端聚醚制备的密封胶适用于混凝土建筑外墙接缝。 |
| 英文摘要: |
| A sealant was prepared using silane terminated polyether as the main raw material，and applied to the exterior wall joints of concrete building.The rheological properties，acid and alkali resistance，freezing-thawing resistance，pollution resistance，aging resistance and water resistance of the sealant were studied.The results indicated that with the extension of curing time，the tensile strength of the sealant film first increased and then tended to stablize.As the pH value of soaking solution increasesd，the changes in the tensile strength and elongation at break of the sealant film were smaller，which had a certain degree of acid and alkali resistance.After 12 months of outdoor exposure，the elongation at break of the sealant film decreased by 2.4%，which exhibited good aging resistance.The exterior wall joints of concrete building coated with sealant had good freezing-thawing resistance and pollution resistance.When soaked in water for 7 d，the exterior wall joints of concrete building coated with sealant showed good tensile bonding performance，and the elongation at break remained unchanged，which displayed excellent water resistance.The sealant prepared using silane teminated polyether was suitable for the exterior wall joints of concrete building. |
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