The invention relates to the technical field of road and bridge crack repairing, in particular to a concrete crack repairing device in road and bridge construction, which comprises a
slurry barrel and a fixing plate, the left side of the
slurry barrel is fixedly provided with a beating and trimming
assembly, the beating and trimming
assembly comprises a connecting rod, and the left side of the connecting rod is fixedly provided with a first connecting rod; a second connecting rod is movably mounted at the top of the first connecting rod, a
staking head is movably connected to the bottom of the first connecting rod, a second connecting rod is movably mounted at the top of the
staking head, a crawler belt is movably connected to the right side of the connecting rod, and a motor is fixedly connected to the bottom of the crawler belt; and the middle of the
slurry barrel and the middle of the connecting rod are fixedly connected with an ash removal
assembly. According to the device, cracks can be beaten and trimmed, so that the cracks are neat, concrete can be matched with a pavement, secondary
cracking is not likely to happen, sandy soil existing in the cracks is convenient to clean, the cracks cannot be blocked, and repairing is convenient.