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Anonymous users2024-01-24Washing with pickling may work well, that's how our dorm is cleaned...
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Anonymous users2024-01-23Use a rubber mace to gently tap the contaminated brick surface.
Then carefully clean up with a utility knife.
Clean it with a rag dipped in detergent.
It cannot be cleaned with a cleaning ball.
There will be scratches.
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Anonymous users2024-01-22Sprinkle with water, soak for a long time, 10 minutes, and then take a wood or plastic shovel, it is more difficult to get, but this is the best way, don't use metal shovels, back to leave scratches.
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Anonymous users2024-01-21Wipe it with a cleaning ball and it's gone.
Find the management office, they should have a way. Because I've seen someone who is professional in dealing with these cement blockages, don't worry.
In principle, the backfill material should be a light material such as cinder, and the general is also a building waste slag formed during decoration, such as broken bricks, broken floor tiles, etc., because it cannot form a compact, so the weight will not be very large, of course, it can not all be used as a backfill, one is a waste of cost, and the second weight is also very large. If the height of the settlement layer is very high, it is possible to exceed the load-bearing capacity of the floor slab. In practice, after the backfill reaches a certain height, it is leveled with cement mortar and tiled.
If the area is large, a professional is needed. The area is small and can be sanded with sandpaper.
You can gently wipe it with water, if not, wipe it with diluted hydrochloric acid, and pay attention to wear rubber gloves to protect your hands from being hurt by hydrochloric acid.
It doesn't matter, the cement is acidic, which will damage the surface of the sofa, that is, the skin will deteriorate