钢筋混凝土梁新旧裂缝综合修补技术研究

Experimental Research on Comprehensive Repair of New and Old Crack of Concrete Beams

混凝土结构裂缝几乎是不可避免的,但大部分裂缝都可以通过修补使混凝土结构物恢复原有功能.为了提高混凝土结构的耐久性,增强混凝土结构的使用功能,可以对混凝土结构构件中出现的裂缝进行修复.本研究提出了新旧裂缝综合修补技术,采用玄武岩纤维水泥砂浆结合灌浆法对混凝土梁进行裂缝修补试验研究,结果发现,这种综合修补方法可以使新补混凝土层中的收缩裂缝与受力裂缝得到明显控制,使修补结构获得良好的整体性,明显提高粘结界面的抗裂性能,使修补结构的耐久性得到有效提高.

It's almost inevitable for concrete structurae to crack,but most of cracks can be patched and thus concrete structures can restore their original function.In order to improve the durability and reinforce the practical function of concrete structures,repairs can be done to the cracks.This study proposes comprehensive repair technology of new and old crack.Experimental research on crack repair to concrete beams is conducted in the way of a combination of basalt fiber cement mortar and grouting method.Results show that shrinked cracks and stressed cracks can be obviously patched,repaired structures can also obtain a good integration;bonding interface crack resistance can be obviously enhanced,and the durability of repaired structures are remarkably improved.