pigletpilot wrote:
A few hours should be enough to have it hard enough that they won't mark it by walking on it. (I spent nearly 40 years in the industry in technical roles). Imagine my concern with 200m2 (about 2000 sq ft) all laid in one day. Kids weren't the worry, but cats love fresh concrete.
Once it's hard enough to not get marked, start your garden sprinkler to 1) cure it, and 2) keep the kids away while you use the bathroom.
In total, we poured a mixer and a half... so that's what, about 9 cubic meters? Tiny in comparison. The team that poured it were less concerned about deep impressions, more 'scratching' the smooth finish.
I had one neighborhood kid put her roller-skates on and asked if she could skate on it. And another little boy who was insistent he 'poke it with a stick.' Otherwise all was quiet.
I do recall being a kid and a very small section of the street I lived on was repaved after some sewer work. When they pulled up the cones we all flocked to it like it was a new swimming pool to ride out bikes, skate and play on it.