装配式建筑外墙拼接缝用密封胶的选择探讨  

Discussion on Selection of Sealant for Exterior Wall Joints of Assembled Building

作　　者：赖振峰[1,2] 王万金[1,2] 贺奎[1] 董全霄[1,2] 夏义兵[1] 吴敬朋[1] 朱宁[1,2] 

机构地区：[1]北京市建筑工程研究院有限责任公司,北京100039 [2]北京市功能性高分子建筑材料工程技术研究中心,北京100039

出　　处：《中国建筑防水》2016年第14期18-21,共4页China Building Waterproofing

摘　　要：分别采用硅酮密封胶(SR)、聚氨酯密封胶(PU)和硅烷改性聚氨酯密封胶(MSPU)三种密封胶制成混凝土粘接试件,并进行了耐化学侵蚀、耐冻融循环、浸水定伸粘结、耐污染性等测试分析。结果表明,MSPU密封胶兼具SR密封胶和PU密封胶的性能优势,在测试的几种性能方面均表现出明显的优势,更适合用于装配式建筑外墙拼缝的密封处理。Concrete bonding specimens are made from silicone sealant （SR）, polyurethane sealant （PU） and silane modified polyurethane sealant （MSPU） respectively. Chemical corrosion resistance, freezing and thawing cycle resistance, adhesive property at fixed extension in water, pollution resistance and other tests and analysis are conducted on the specimens. Results demonstrate MSPU sealant possesses the performance advantages of both SR and PU sealants, all the properties tested show obvious advantages, so this sealant is more suitable for sealing treatment of exterior wall joints of assembled buildings.

关 键 词：硅酮密封胶 聚氨酯密封胶 硅烷改性聚氨酯密封胶 化学侵蚀 冻融循环 浸水定伸粘结性 耐污染性 

分 类 号：TU58[建筑科学—建筑技术科学]