This project took place at Audi of West Chester. The Audi project was 24,000 square feet of 5,000 psi concrete. Watch the timelapse video of the project below & learn more about the project.

Here’s the process we followed for this job:

  1. We routed and cleaned all control joints and coated with the vapor block then filled with a grey two-component polyurea.
  2. Then we shotblasted the concrete to a CSP 3-4. All holes and cracks were filled afterwards.
  3. Moisture tests were done, both a calcium chloride and Wagner insitu test, which showed moisture content up around 95%. Tests were installed per ASTM F2170 by W.T. Rupnicki Certified concrete slab moisture testing ID 01303981 ICRI.
  4. We decided to install a moisture vapor barrier supplied by CFI. This was applied at a rate of 12 mils dft. This was applied to minimize any vapor transmission through the concrete.
  5. After this cured, we applied the first lift of Grey 440 epoxy and broadcasted a small grain sand until rejection.
  6. After curing we cleaned up all excess sand and vacuumed the floor surface. Then we ran a buffer with 80grit sandpaper over the entire floor to remove any high spots.
  7. We then applied the second lift of grey 440 epoxy and broadcasted until rejection.
  8. After curing we cleaned up all excess sand and vacuumed the floor surface; then we ran a buffer with 80grit sandpaper over the entire floor to remove any high spots.
  9. We then applied CFI’s Wearcoat 100 as a grout and top coat to the open sand texture.
  10. The last task was filling expansion joints with a flexible two-component Urethane.

The project turned out beautiful and the owner is very happy with the results.

Posted In: shot blasting, the process