Permeable sidewalks #FTW! It’s drenching rain in #WestSeattle this morning and look at the difference between these two surfaces. Better for walking and better for the water table!

#Seattle #ClimateChange #WaterCycle #UrbanEnvironment

@KevinFreitas Very cool! Would you happen to be familiar with the name of the material?
@luciano I’m not, sorry. It’s used in various projects around Seattle but not sure if it’s required or helps get a developer a tax break by meeting some level of environmental friendliness. This vid is where I first heard of it: https://youtu.be/2wm4H65EDbE?si=YYwKCyBrt8uuCo-7
Topmix Permeable Testimonial - The ultimate permeable concrete system

YouTube
@KevinFreitas No sweat! Thanks for sharing the vid :)

@KevinFreitas @luciano various names - Pervious concrete is often used. See https://en.wikipedia.org/wiki/Pervious_concrete?wprov=sfla

It's been around a while, at least 15 years. Many variations. Can also do pavers from it.

Pervious concrete - Wikipedia

@luciano @KevinFreitas “Pervious concrete”

aka porous concrete, permeable concrete, no fines concrete and porous pavement

@KevinFreitas What a brilliant idea! Thanks for sharing this.
@KevinFreitas You remind me of life being built with semipermeable membranes (among other things), so here we are, art (and technology) imitates life.

@KevinFreitas Its too bad that #NYCParks doesn't believe in permeable pavement. They are still using asphalt where they could use permeable grid pavers.

At least #NYCDEP understands permeable pavement. Maybe #NYCDOT can get on board.
#GridPavers

@KevinFreitas It seems that Hudson River Park understands permeable pavement.
#HudsonRiverPark
@Iragersh @KevinFreitas “When it rains…it’s porous” is a fantastic tagline! ❤️
@KevinFreitas For pavements they may be a good choice (I'm not a materials engineer). But they are unfortunately not suitable everywhere. They are much less resilient compared to regular asphalt.
@loke Feel like I’ve read there are different mixes for different climates. Regardless, one piece of the climate puzzle.

@KevinFreitas It's an amazing invention indeed. I don't think I've ever seen it in real life, but the videos I've seen of it looks almost magic.

I'm not sure I agree that it's a positive thing for the climate though. It requires more maintenance (needs to be repaved more often). What climate angle are you considering?

@KevinFreitas
Are there potential issues with soil underneath getting boggy? Or....
Otherwise, it seems like a good idea.
@MrLee Not sure, I’m no engineer. :) Guessing there’s some prep before pouring that matters structurally.
@KevinFreitas
Something Hawaii should try, since all our water comes from rain, and we've covered/paved a lot of ground so it just runs off via the storm drains into the sea ...
@MmeRoux

@KevinFreitas

Are they as durable as regular sidewalks? NYC is one of the places where people wear the sidewalks out with their feet sometimes before the ice and weather get to it.

@KevinFreitas how do these fare in places where daily freeze-thaw cycles are a normal part of late winter and early spring?
@KevinFreitas !!!
Does it get destroyed by ice forming inside it the first winter? Asking for Massachusetts. Nice for warmer places though.