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混凝土与制品
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新旧混凝土界面粘结性能研究

作者:沙建芳1,徐海源1,刘建忠1,郭飞1,张亚梅2

关键字:新旧,混凝土,界面,粘结,性能,研究,江苏,

 
(1.江苏苏博特新材料股份有限公司,江苏 南京  210008;2.东南大学 材料科学与工程学院,江苏 南京  210008)
    摘要:针对提升新旧混凝土界面粘结的性能要求,分别从旧混凝土基面处理方法、新混凝土性能等方面开展了相关研究。结果表明,采用露骨剂处理基面、调节旧混凝土含水状态及降低新混凝土收缩率是提高新老混凝土粘结强度的有效方式。优化新旧混凝土界面空隙,降低缺陷、提高物理粘结力,是提高结合体粘结强度的根本原因。
    关键词:修补材料;修补加固;界面粘结;粘结强度
    中图分类号:TU528         文献标识码:A         文章编号:1001-702X(2019)10-0133-03
 
Study on interfacial bonding behavior of new and old concrete
SHA Jianfang1,XU Haiyuan1,LIU Jianzhong1,GUO Fei1,ZHANG Yamei2
(1.Jiangsu Sobute New Materials Co. Ltd.,Nanjing 210008,China;
2.School of Materials Science and Engineering,Southeast University,Nanjing 210008,China)
    Abstract:In order to improve the performance of the interface bonding between old and new concrete,the paper carried out relevant research from the aspects of the old concrete foundation surface treatment method and the new concrete performance. The results show that it is an effective way to improve the bonding strength of new and old concrete to treat the base surface,adjust the moisture content of the old concrete and reduce the shrinkage of the new concrete. Optimization of interfacial voids between old and new concrete,reduction of defects and improvement of physical bonding force are the fundamental reasons for improvement of bond strength of the composite.
    Key words:repair material,repair reinforcement,interface bond,bond strength