After continuous development and improvement, the crack resistance of steel mesh has been greatly improved. If the crack resistance of the wire mesh decreases, it is necessary to find out the specific reasons in time and whether there are rescue treatment points. The following is the analysis of the crack resistance of the wire mesh surface.
The use of steel welding net in our country is still in its infancy, and the total amount of steel used in our country is less than one tenth. In the early 1990s, the steel welding net was listed as a key project by the State Science and Technology Commission and the Ministry of Construction, and the regulations and regulations were formulated.
With the development of infrastructure construction in our country, the contribution to infrastructure construction is increasing constantly, and the strategy of western development is implemented. As economic construction enters a new stage, the demand for steel welding network will be doubled in infrastructure construction such as electric power, transportation, water conservancy, housing and municipal administration.
According to the site excavation, the steel mesh arranged on the construction side is 10 cm apart from the surface, which greatly exceeds the requirements of the code and reduces the crack resistance of the steel mesh. Due to the increasing temperature, the influence of thermal expansion and contraction, and the characteristics of concrete, the cracking of the surface layer is significant.
The steel net of pavement layer is too low, which results in thick concrete protective layer. It is reported that the pavement is a concrete pavement 14cm thick above the bridge structural plate, a plane pavement and a non-load-bearing structure. According to the specifications, the steel mesh of the pavement should be laid 4 centimeters below the surface. All of these factors may lead to cracks in the steel mesh, which may lead to shedding. We just need to pay attention to these points, and then we don't need to worry too much.