Pervious concrete

I hate drains, so this is interesting.

Pervious concrete on wikipedia.

via Boing Boing.

Edit: Just realized that freezing will probably break the concrete. So not a solution here up north.

Edit 2: Turns out they have thought about that:

Q: What about freeze-thaw issues?

A: Pervious concrete has been placed in freeze-thaw climates for over 15 years.
Successful applications of pervious concrete in freeze-thaw environments have
two common design features– the cement paste is air-entrained, and the
pervious concrete is placed on 6–12 inches of drainable aggregate base (¾” or
larger clean gravel)

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