This is a video demonstration of Lafarge Tarmac's Topmix permeable concrete drinking up 4,000 liters of water poured onto it. That is impressive. The concrete in my apartment building's parking lot? It could drink 4,000 liters too, but only beer and liquor. It has a drinking problem but nobody in my building wants to talk about it.
Keep going for the video.
Thanks to Marcus O, who wants to know where all that water goes.