The process of mixing mortar is relatively easy and straightforward as long as you have the right recipe.
Sanding concrete close to a wall.
Usually the patched areas are visibly noticeable even if the area gets painted.
How to smooth a concrete wall finish step 1.
Press the grinder.
Attach a diamond sanding pad to a hand held grinder.
Do not try to make the wall level.
Also like sanding a concrete floor it is best to start with an area in a corner or near a wall.
Patches of cement are often uneven and stand out from the rest of foundational walls especially if cracks in the original walls necessitated the repair.
Remove the soap residue by rinsing the walls with a sponge and.
Sanding concrete using an orbital sander if you have concrete that is going to be exposed architecturally you can sand it by hand using wet and dry sandpaper or an orbital sander.
Trowel a 3 8 inch.
Once you have everything prepared you will need to mix the mortar.
Roll liquid concrete bonding agent over the surface of the wall in fairly straight lines using a short napped.
Sand any particularly bad areas of concrete with rough grit sandpaper.
4 thoroughly sand the concrete.
A diamond pad is the only type strong enough to cut through.
Normally you d start by using a coarse grit sandpaper that is in the range of 40 60 grit.
Remove uneven patched areas of concrete by sanding it with an angle grinder.
The sandpaper you choose depends on the quality and intensity of sanding you want to do.
After sanding you should apply 2 3 coats of acid wash on the entire surface to hide sandpaper scratch marks from the concrete.
How to sand concrete walls step 1.