Couple of things. It isn't asphalt, it's concrete. That is cement with aggregates. Asphalt is bitumen, oily stuff.
Because of its composition it isn't very strong. This is not structural concrete, it's only just strong enough to handle the weight of vehicles in a parking lot. High horsepower cars would chew it up in a hurry. You could compromise the perviousness some to make a stronger mix but I imagine you'd completely lose its water handling effects by the time you got to a strength that rivals a good bitumen asphalt that would have better traction than any concrete.
Also the recent 'viralness' of pervious concrete is interesting. I think someone came up with a 'new' product and have been promoting it like crazy. The concept itself is quite old.
Edited by Chubby_Deuce, 02 October 2015 - 17:27.