Empty drum treatment of mortar layer
Cut out the empty drum range with a cutting machine, and adjust the blade depth to 15mm, which is slightly larger than the actual empty drum range. After cutting, chisel away the surface layer within the empty drum range with tools. Clean up the base, moisten it with water, use standard cement mortar to make it up twice, and master the lighting time to prevent the new and old joints from drying cracks again. If it is a concrete base, it should be coated with concrete interface agent before repair, otherwise it will be empty.
Empty drum treatment of paint layer
To eradicate empty drum, it is best to shovel more with empty drum as the center; Fill the mineral water bottle with water, drill a small hole in the lid, and wet and empty the drum; Filling with mortar is generally1:3; When it's dry, you can paint it.