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#4463818 - 07/19/17 10:36 AM Reflective Pavements
Alfred_B Offline


Registered: 05/12/15
Posts: 1968
Loc: America
What do you think about the experiment in Los Angeles where they are changing regular pavement into reflective pavement (they apply a light colored sealant)? It cools the surface by 10-30 degrees and is estimated to save $100,000 in electricity costs per year.

https://twitter.com/BSSLosAngeles/status/887044828776734721

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#4463832 - 07/19/17 10:50 AM Re: Reflective Pavements [Re: Alfred_B]
HerrStig Offline


Registered: 08/24/11
Posts: 9560
Loc: Boston, MA
Are they using gold color paint?

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#4463852 - 07/19/17 11:09 AM Re: Reflective Pavements [Re: Alfred_B]
ArcticDriver Offline


Registered: 01/27/17
Posts: 1139
Loc: USA
How does it save electricity costs of $100K/annually?
Does it adversely affect braking distance when wet?
How long does it last before it requires a recoat?
How much does the labor and materials and taking the road out of service during this process cost?

For that matter, why is a roadway that is 10* cooler a big advantage?

It looks nice...can I get this product for my driveway?
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#4463853 - 07/19/17 11:09 AM Re: Reflective Pavements [Re: HerrStig]
beanoil Offline


Registered: 10/17/04
Posts: 2955
Loc: Midwest, Illinois
Originally Posted By: HerrStig
Are they using gold color paint?

Doubt it. It's California.
Has to be a low VOC, renewable, non polluting, converter equipped layer of environmentally friendly hog wash.
We do that here in the Midwest too. It's called snow. Saves on AC for several months out of the year.


Edited by beanoil (07/19/17 11:13 AM)
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#4463865 - 07/19/17 11:22 AM Re: Reflective Pavements [Re: Alfred_B]
09_GXP Offline


Registered: 12/14/10
Posts: 430
Loc: Indianapolis, IN
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#4463882 - 07/19/17 11:37 AM Re: Reflective Pavements [Re: beanoil]
ArcticDriver Offline


Registered: 01/27/17
Posts: 1139
Loc: USA
Originally Posted By: beanoil
Originally Posted By: HerrStig
Are they using gold color paint?

Doubt it. It's California.
Has to be a low VOC, renewable, non polluting, converter equipped layer of environmentally friendly hog wash.
We do that here in the Midwest too. It's called snow. Saves on AC for several months out of the year.


Yeah but you guys in the Midwest spend millions to remove that snow with chemicals very harmful to my beautiful steel.

I hear you on the type of sealant it must be in CA.

Its like when the US switched the formulas for the paint used in striping roadways to an environmentally friendly type...now those lines need to repainted approximately 5-6 times as often. Was the outcome worth it? Well there are probably some greenies who now sleep more soundly at night listening to NPR. grin
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#4463984 - 07/19/17 01:17 PM Re: Reflective Pavements [Re: beanoil]
Garak Offline


Registered: 12/05/09
Posts: 24586
Loc: Regina, Saskatchewan, Canada
Originally Posted By: beanoil
Originally Posted By: HerrStig
Are they using gold color paint?

Doubt it. It's California.

Probably has to be real gold. wink
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#4463989 - 07/19/17 01:21 PM Re: Reflective Pavements [Re: 09_GXP]
Rhymingmechanic Offline


Registered: 08/13/04
Posts: 1327
Loc: VA


Thanks for that extra info. I wonder if a similar result can be achieved by repaving the streets with concrete when they need it.

Replacing asphalt with lighter material, along with planting more trees and using reflective roofing like the article explains, seems like a sensible combination to reduce the "urban heat island" effect. Darker materials absorb heat and lighter ones reflect it. Even my relatively small metro area illustrates what they're trying to address--the summer temperature and overnight low in the city center is always a few degrees higher than the suburbs and more rural outskirts.

I heard a radio story--on NPR, no less--that said Atlanta actually influences its own weather with this heat effect. To check my memory, I just did a quick Google search and came up with results from Atlanta Magazine, National Geographic, and this article: http://www.weatherwise.org/archives/back%20issues/2010/march-april%202010/atlanta-full.html

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#4464010 - 07/19/17 01:34 PM Re: Reflective Pavements [Re: Alfred_B]
dparm Offline


Registered: 04/19/10
Posts: 13466
Loc: Chicago, IL
Phoenix has similar problems. Residents there have slowly changed the climate over the past few decades because so many of them insisted on having grass lawns and watering the [censored] out of them. This, coupled with the explosive growth of the metro area, have only made the Colorado River problems even worse.

Tucson, only about 2 hours south, has mostly the opposite approach: zeroscaping. No grass, just rocks in the front yard.
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#4464019 - 07/19/17 01:43 PM Re: Reflective Pavements [Re: Alfred_B]
Olas Offline


Registered: 12/11/13
Posts: 3933
Loc: Manchester, England
Heat is your friend. Oil and coolant and tyres and brakes all like to be hot.
Until I see it I can't help but feel that it will be slippery when wet.
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#4464128 - 07/19/17 03:39 PM Re: Reflective Pavements [Re: Alfred_B]
CT8 Offline


Registered: 10/09/14
Posts: 10984
Loc: Idaho
The voters will vote a tax increase to fund the coloring. It is for the children.
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#4464210 - 07/19/17 05:00 PM Re: Reflective Pavements [Re: ArcticDriver]
HerrStig Offline


Registered: 08/24/11
Posts: 9560
Loc: Boston, MA
Originally Posted By: ArcticDriver
Originally Posted By: beanoil
Originally Posted By: HerrStig
Are they using gold color paint?

Doubt it. It's California.
Has to be a low VOC, renewable, non polluting, converter equipped layer of environmentally friendly hog wash.
We do that here in the Midwest too. It's called snow. Saves on AC for several months out of the year.


Yeah but you guys in the Midwest spend millions to remove that snow with chemicals very harmful to my beautiful steel.

I hear you on the type of sealant it must be in CA.

Its like when the US switched the formulas for the paint used in striping roadways to an environmentally friendly type...now those lines need to repainted approximately 5-6 times as often. Was the outcome worth it? Well there are probably some greenies who now sleep more soundly at night listening to NPR. grin
If I listened to Not Particularly Reliable radio I wouldn't be able to sleep at night for fear of Russians everywhere. smile

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#4464279 - 07/19/17 07:02 PM Re: Reflective Pavements [Re: Alfred_B]
danez_yoda Offline


Registered: 07/18/09
Posts: 464
Loc: texas
not when these guys get a hold of it.



Edited by danez_yoda (07/19/17 07:04 PM)

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#4464586 - 07/20/17 06:33 AM Re: Reflective Pavements [Re: Alfred_B]
supton Offline


Registered: 11/09/08
Posts: 11974
Loc: NH
I have to wonder if it'll be miserable to drive on, at certain hours of the day. Just like how it can be awful to drive when the sun comes out after a sudden rain.
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#4464618 - 07/20/17 07:31 AM Re: Reflective Pavements [Re: Rhymingmechanic]
The_Eric Offline


Registered: 03/31/10
Posts: 5354
Loc: Iowa
Originally Posted By: Rhymingmechanic


Thanks for that extra info. I wonder if a similar result can be achieved by repaving the streets with concrete when they need it.

Replacing asphalt with lighter material, along with planting more trees and using reflective roofing like the article explains, seems like a sensible combination to reduce the "urban heat island" effect. Darker materials absorb heat and lighter ones reflect it. Even my relatively small metro area illustrates what they're trying to address--the summer temperature and overnight low in the city center is always a few degrees higher than the suburbs and more rural outskirts.

I heard a radio story--on NPR, no less--that said Atlanta actually influences its own weather with this heat effect. To check my memory, I just did a quick Google search and came up with results from Atlanta Magazine, National Geographic, and this article: http://www.weatherwise.org/archives/back%20issues/2010/march-april%202010/atlanta-full.html
I'm pretty sure that wouldn't work out as you planned. Concrete will still absorb solar energy and give it off once the sun goes down. Trees, depending on the area may not be a good idea either as they require water- which is getting scarce.
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