Did you have someone stain your concrete floor and it just turned out horrible? If so you might be interested in knowing how to remove the stain. Depending on what type of stain was used there is two possible ways to remove the stain. If the stain was a water based acrylic stain (paint) you could use a paint stripper to remove the stain from the concrete.
If however the stain was an acid stain or an acetone dye, you will not be able to use any type of strippers to remove or lighten the stain. You will have to grind the concrete with either a hand grinder fitted with a diamond wheel or use a stand behind grinder. Grinding will remove any type of stain that was used, so if your not sure I would begin with grinding the concrete. You want to make sure you don’t use a very aggressive diamond wheel or you will leave a rough profile.
When grinding concrete make sure you have a vacuum and respirator because the concrete dust is very harmful to your lungs. Hope this helps!
How do you repair alkali silica reaction in concrete? I wish there was a simply solution to achieving that. I had a homeowner call and tell me she was having small modules of gel leaching out of the concrete, and over time the gel would harden. She had an engineer come out and take samples of the concrete, they determined that she had alkali silica reaction or (ASR).
So I went over to the house to take a look at the problem and was amazed by what I saw. Take a look for yourself:
Alkali Silica Reaction
I’m sure you can figure out why this might be a problem. For starters she has a decorative overlay in the house that is peeling off because of this reaction. She also has sticky gel all over her floor which makes it difficult to keep clean. She asked if there was any way to prevent the gel from re-appear.
I asked a couple of different suppliers and manufactures about what can be done to stop this. For the most part they all told me the concrete has to be jack hammered out and re-poured, which is not feasible because the house is already built and she is living in it. One person told me I can use a product called Aqua Block and that might help.
I told the homeowner I would not mind messing around with it seeing if anything will help the situation. I suggested to grind the concrete down where the ASR was happening, which happens to be where all of the structural beams are. After grinding the concrete I left one area untreated and another area I treated with Aqua Block to see if that will help at all. After a couple of months I will go back and check to see if their is any improvements. If anyone has any suggestions or questions on this issue please email me at firstname.lastname@example.org.
If your looking for a matte finish concrete floor that is easy to clean, then consider honed concrete for an option. Honed concrete is achieved by grinding the concrete to an even texture and then smoothing the surface with finer diamond pads. We typically stop at a 200 grit pad for honed concrete, if you wanted a polished surface you would continue to the next polishing pad. Honed concrete is beneficially because the duller surface wont show as much dust and dirt as a highly polished surface would. Honed concrete is an excellent choice for exterior patios and walkways. Take a look at the pictures below of an interior concrete floor that is honed to a 200 grit.
This week we had a job that consisted of removing tile and then polishing the concrete underneath the tile to create a modern concrete floor. When we started removing the tile floor we realized the tile was sitting on a mud-base that was 2″ thick. Instead of removing the tile and the mud-base we prepped the tiles to receive a self-leveling cement topping. After we poured the new concrete floor we sealed the floor with a water base sealer.
This was a very old concrete patio at a house designed by O’neil Ford in San Antonio, Tx. When they poured the concrete they seeded the top with green marble chips. When the concrete hardened they came back with a grinder to grind the concrete and expose the marble chips. This gave a similar look to Terrazzo Flooring. Over time the concrete eroded and some of the marble chips were popping out leaving small pits on the surface.
The first thing we did to renovate the concrete patio was applied a grout to the surface to fill the pits. We then ground the concrete and honed the surface to a 400 grit finish. The homeowner did not want to polish the concrete to a very high level because the patio was close to a pool and could be slick when water was on the surface. Honed concrete is a very nice option for a nice modern look for an outside patio.
If you have a old concrete patio that needs to be renovated give us a call at (210) 422-6116. Even if you think your concrete patio is in the worst condition we will come out for free and give you are input.
Here we are using a small stand up grinder fitted with a 24 seg diamond cup wheel to grind thin-set off concrete. This is a fast and effective way to remove thin-set. After you remove it you can then stain the concrete, or put another flooring material down.
Removing tiles and thin-set can be a big drag when deciding to get new flooring installed. There are times when you can place the new flooring directly on top of the tile if the elevation won’t be an issue, but a lot of times the tiles needs to be removed.
We use special chipping hammers attached to vacuums so the dust created breaking the tiles is minimized. We then remove the thin-set with grinders to create a nice surface for your new flooring to be installed on.
There are some flooring companies that do not require the thin-set to be removed, they will often just use a self-leveler cement to create a smooth surface. This is ok as long as the surface elevation will be ok, if you are trying to but up to an existing wood floor the best thing to do is grind the thin-set off so the new flooring will be flush.
If concrete is not poured and finished properly the surface of the concrete will start to dust. The dust is typically caused by too much water in the concrete or the concrete finishers added water to the surface when finishing. This will make the top surface of the concrete weak and with traffic the concrete will start dusting.
The dust created from concrete will make the surface a slipping hazard and also will affect breathing of the occupants that are in the building. Even if the concrete is covered with carpet the surface will continue to dust and can cause allergies. The dusting will also cause flooring failures that are glued down to the concrete.
The easiest way to dust proof concrete is to apply a lithium silicate densifier. In extreme cases were the surface of the concrete is also delaminating, the weak surface will need to be ground off before applying the densifier.
Concrete restoring is a cost affective way to fix concrete without tearing out and re-pouring. Concrete can be restored anywhere there are problems; whether it is a concrete driveway, sidewalk, tilt-up walls, stucco walls, concrete walls, parking garages, curbs, and parking lots.
If you have any problems with your concrete such as: cracks in the concrete, concrete spalling, concrete discoloration, and concrete joints that are un-even; give us a call at (210) 422-6116 for a free consultation.