预制构件拼接胶在南京长江第五大桥节段梁拼接密封防水工程中的应用与研究  

Application and Research of Splicing Adhesive for Prefabricated Parts in the Segment Joint Sealing and Waterproofing of the 5th Nanjing Yangtze River Bridge

作　　者：姜云 李波[2] 亓帅[2] 孙德文[2] 尹浩[2] 张小冬[2] Jiang Yun;Li Bo;Qi Shuai;Sun Dewen;Yin Hao;Zhang Xiaodong(JSTI Group Co.,Ltd.,Nanjing,Jiangsu 211112,China;Jiangsu Sobute New Materials Co.,Ltd.,Nanjing,Jiangsu 210008,China)

机构地区：[1]苏交科集团股份有限公司,江苏南京211112 [2]江苏苏博特新材料股份有限公司,江苏南京210008

出　　处：《中国建筑防水》2021年第1期14-18,共5页China Building Waterproofing

基　　金：国家自然科学青年基金项目(52008188);国家重点研发计划资助项目(2017YFB0309904);国家自然科学基金联合基金项目(U170620242);江苏省自然科学基金资助项目(BK20170114);江苏省建设科技资助项目(2017JH17005)。

摘　　要：预制构件拼接胶在装配式桥梁建设过程中扮演着重要角色,其主要起到粘结、密封节段之间缝隙;防止水分侵入缝隙导致预应力钢绞线锈蚀失效,对桥梁结构长久安全造成威胁。针对南京长江第五大桥建设中存在的夏季高温、高湿、多雨的施工环境,通过低放热固化剂的合成与应用以及仿生基团接枝改性技术,提升了环氧预制构件拼接胶在高温环境下的可施胶时间及可粘结时间,同时提高了其在混凝土基面潮湿条件下粘结性能,实现了夏季高温环境及小雨环境可施工,为工程建设节约工期的同时保证了工程质量。Splicing adhesive for prefabricated parts plays an important role in assembled bridge construction.Its main functions are:bonding and sealing of bridge segment joints;preventing water from entering the joints to corrode and disable the prestressed steel strand and further threaten the long-term safety of the bridge structure.With regards to the summer high temperature,high humidity,rainy construction environment for the 5th Nanjing Yangtze River Bridge,the applicable and bondable period of epoxy splicing adhesive for prefabricated parts under high temperature is improved through synthesis and application of low exotherm curing agent and bionic graft modification technology;meanwhile,its bonding performance with concrete substrate under damp conditions is improved as well.It not only enables the construction move forward under high temperature and light rainy conditions in summer,but also saves construction time and guarantees the project quality.

关 键 词：预制构件拼接胶 环氧 预制节段梁 桥梁拼接 

分 类 号：TU502[建筑科学—建筑技术科学] TU578