First, concrete carefully polished, not miss any polished place, especially a lot of strength is not good, it must be polished to have strength, otherwise, loose areas with peeling coating, and the time will soon be possible, engineering has not yet been settled will take off; at the same time, suggest grinding two two, a cross type, to prevent leakage, can be more thoroughly.
Second, after the end of grinding, after cleaning, it is recommended to vacuum dust treatment, so that better penetration of paint, water tension, and easy to affect permeability;
Third, there is no expansion joint to the ground, deep seam to prevent future due to the internal stress of concrete, the formation of irregular cracks; expansion joints, steel hook joint cleaning, and dust with vacuum cleaner.
Fourth, where there are irregular cracks, we should do the kerf treatment, repair with epoxy mortar, and pay attention to the difference between the repair;
Fifth, the edge of the column and corner of the corner grinder angle grinder, smooth and smooth processing;
Sixth, where there is water, remove the water with a water heater, remove the surface of the mud, and then wash it with water and wash it, clean it, dry it for a day, and then put on the primer;
Seventh, the oil, the first surface of the grease out clean, then clean with cleaning agent, and then roasted, if the oil is particularly serious, need to re pouring concrete off.