Experimental research on new and old crack comprehensive repair to concrete beams

It is almost inevitable for concrete structural cracks to happen. 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 new and old crack comprehensive repair technology. 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 shrinkage cracks and stressed cracks can be obviously patched; repaired structures also can obtain a good integration; bonding interface crack resistance can be obviously enhanced; and the durability of repaired structures are remarkably improved.