Waterproof, No-maintenance Concrete

Sounds like awesome stuff...how long before entire airport runways are made with this to avoid icing problems? Overpasses in winter also become iced up, and if water simply rolls off, less accumulation of ice, perhaps. Although no mention was made of snow, compacted snow, etc.

I would be worried about the rate of melting for this. If it decreases melting time, I would worry about floating ice, but if it increased melting time, thus giving the plows more time, I would worry about accumulation. I wonder which problem would be more difficult?

If it is as hydrophobic as it appears (repels water), then water will bead up, and not spread. The beads will tend to roll away as more water is added, given any crown to the runway. I think runway de-icing just got a whole lot simpler, but planes themselves will still have to be de-iced (and kept that way) or be grounded.

As to roadways, not sure this concrete will be cost competitive, except in bridge construction, and other areas where ice accumulation is a real problem for traffic. The product was shown to be flexible, so it can take a pounding, not sure about any transition from bendability to brittle state with temperature (the video was really short on details), and they mentioned something about this being "smart" concrete, presumably they can embed sensors within it.