I was looking up the same thing, I guess the snow got you wondering? The town put in new sidewalks and aprons on my street in the summer. They also sent us a card a couple of weeks warning us of the dangers of rock salt and advising us to use a calcium chloride salt. I was just looking around online and it seems the consensus is to wait at least 1 year for the cement to cure. I'm just going to use a calcium blend on my sidewalk VERY lightly.
BTW, I've been using rock salt on my driveway which was done like 12 years ago and have never had any problems.
Opps, just realized you have an asphalt driveway, not sure what to do.