I have some issues with the slab that was poured for a garage, and I need to frame an interior wall over a bad area.
The slab was poured with a bit too much water (5.5 slump) on a hot day in July. I think this caused some water to get trapped, which caused a top layer of concrete, about 1/4" to 1/2" thick to peel off and sound hollow under some spots. Also, the floor isn't perfectly level, as the troweling machines were put on it too soon.
What products(*) and process should be used to correct these surface defects prior to framing walls over them?
Here are some photos:
* By "product", I mean self-leveling, patch, hydraulic, ready-mix, etc, or a combination thereof, not necessarily a brand recommendation.