Crack Repair and Reinforcement Project
Micro-cracks are usually harmless cracks. They will not damage the load-bearing and anti-seepage functions of concrete. However, due to the effect of load and temperature difference, micro-cracks will continue to expand and connect. This leads to the appearance of macroscopic cracks, which are usually called concrete craft cracks, and the cracks in Qingdao need to be repaired and maintained.
The main construction methods for crack repair in Qingdao are as follows.
As long as the crack width is greater than 0.1mm, the crack depth will not reach the depth of the protective layer, and the crack remains static, ensuring the safety and durability of the building. The cracks in Qingdao area are repaired by the surface sealing method, and the plastic cracks and dry cracks can be reinforced after the cracks are basically stabilized or after the cracks are treated. For plastic cracks and dry cracks, the active cracks can be treated after they are basically stabilized, or they can be reinforced after the cracks are treated. The injection method can be used to suppress crack propagation.
Regarding the repair of rust-expansion cracks, all the loose concrete after rust-expansion must be removed, generally to the position of the steel bar, so that the steel bar is exposed, and then repaired with special repair materials.