基于复合增韧的混凝土桥梁裂缝修补技术及其结构耐久性
Crack Repair Technology and Durability of Concrete Bridge Based on Composite Toughening
田中亚 1李秉千 1张建强 1毕丽丽 1王邢宇 2崔凤坤2
作者信息
- 1. 中铁建山东京沪高速公路济乐有限公司,山东 济南 250000
- 2. 山东交通学院,山东 济南 250357
- 折叠
摘要
混凝土桥梁服役期间受到氯盐等腐蚀性化合物的影响,会出现不同宽度及尺寸的裂缝,严重影响结构的耐久性能.为了提升混凝土桥梁的服役性能,针对结构出现的宽度>0.5 mm的活动裂缝,提出了一种基于复合增韧的混凝土桥梁裂缝修补技术.基于提出的修补技术,采用经典的RCM法对不同材料修补的混凝土试件耐久性进行分析,测定了不同材料修补后的结构抗氯离子渗透性.结果表明,相较于普通砂浆和高强砂浆修补的混凝土试件,采用环氧树脂修补的结构氯离子渗透系数仅为0.11×10-12 m2/s,耐久性能更好.
Abstract
Concrete bridges are affected by corrosive elements such as chloride and salt during service,and cracks of different widths and sizes will appear,which will seriously affect the durability of structures.In order to improve the service performance of concrete bridges,a composite toughening method was proposed to repair the active cracks of concrete bridges with a width greater than 0.5 mm.Based on the proposed repair technology,the classical RCM method was used to study the durability of concrete specimens repaired with different materials,and the chloride ion permeability resistance of structures repaired with different materials was measured.The results show that,compared with the concrete specimens repaired by ordinary mortar and high-strength mortar,the chloride ion perme-ability coefficient of the repaired structure repaired by epoxy resin is only0.11×10-12 m2/s,and the durability is better.
关键词
混凝土桥梁/裂缝修补/材料/耐久性Key words
concrete bridge/crack repair/materials/durability引用本文复制引用
出版年
2024
NETL
NSTL
万方数据