Rapid set mortar will be set hard enough to be driven on in an hour.
Does it still take the conventional 28 days to cure like "normal" concrete?
I have patched a section of an exterior concrete wall with it, about 4"X4" in size and 3" deep.
How long should I wait before I drill 3/16" holes on it for a few Tapcon screws to hold up an electrical box for a wall sconce?