Concrete takes 28 days to cure. The most commonly used cur promotor is calcium chloride. It should be slick, but it is corrosive, so I wouldn't use it near pipes.

General rules for concrete:
- you can walk on it in ~4h
- you can drive on in 24h, but I wouldn't go anywhere near edges or corners.
- it's very brittle for about a week.
- cured enough for drilling and fastening in about 2 weeks, this is ~80% of cure strength
- fully cured in 4 weeks.

Scott

My HT