水工涵闸钢筋混凝土碳化调查与处理

Investigation and repair of reinforced concrete carbonation in hydraulic culvert gate

本文介绍对北京河道上先后修建的130余座涵闸老化、病害情况的调查结果及处理措施。调查发现，对这些涵闸钢筋混凝土威胁最大的破坏是混凝土碳化引起的构件表面剥落和钢筋锈蚀，需要尽快地处理的面积占普查面积40％。本文中还介绍了对17座涵闸已碳化混凝土用补偿收缩砂浆和Hz902环氧涂料修补的工艺。

The paper introduces the investigation result and repairing method of the ageing and disease of more than 130 culvert gates on the river courses in Beijing. The investigation indicates that the greatest menace to the reinforced concrete of these culvert gates is the peeling of the component surface and the rusting of reinforcing bar caused by carbonizationof the concretes, the area needed to be repaired rapidly is 40% of the survey area. The mending process on carbonated concrete of 17 culvert gates is also presented by using compensating systolic mortar and epoxy coating Hz902.