Steel plate and concrete produce void of steel jacketing

1.Inappropriate grinding and cleaning of the surface of the steel plate

solution：

1）The steel plate should be polished, rusted and cleaned with acetone

2）The treated steel plate should be constructed as soon as possible to avoid further corrosion and pollution.

2.The surface of concrete is wet or the humidity in the air is high

solution：

1）Ventilation and dehumidification

2）Avoid large-area operations of construction components attachments at the same time (such as wall plastering)