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In China A Bridge Retrofit Takes 43 hrs Instead Of 2 Months

Enzoblue says...

When I was in Shanghai for Formula one, I rode a bike to the buses that went to the track every day. One night I got lost on the bike ride back to the hotel. The next day I realized it was because they repaved one mile of road that was on my route within the time I was at the race, (maybe 9hrs) and it threw me off. Would have taken a week here minimum.

Solar Roadways - Reality Check

xxovercastxx says...

Less snobbery and more information would have made for a better video.

Ok, so it'll cost 20 trillion dollars to replace all the roads in the country... How much would it cost to repave all those roads? I suspect that would also be more than the annual federal budget, yet all those roads still exist.

Apparently it takes a shitload of energy to melt ice, but how much energy does it take to prevent ice from forming?

Skepticism is absolutely the correct position here until we begin to see functional systems in real-world situations but, if you're going to spend the last 3 minutes of your critique video puffing on about how you're doing the real investigative journalism that we all need, then maybe you should perform a proper investigation and reveal your facts and findings like an intelligent adult.

Street repaving in San Francisco

Porksandwich (Member Profile)

aaronfr (Member Profile)

Street repaving in San Francisco

Porksandwich says...

Grinding the streets first inch or two off. When they stop it's probably because of a man hole, storm drain or something they are trying to not damage and have to go around or do the hand work around it.

Street looks dark right after they grind because the asphalt underneath has sections that aren't bleached from the sun and what not.

Then they smooth it to pick up the bits left, the street gets white looking because of all the scratching to the layer they leave, or because there is concrete underneath. They do bridges like this...two or more layers of asphalt to take all the wear and tear and water damage. Then replace it every so often so the concrete lasts longer.

Curb sides take the longest because they don't want to break the sidewalks, and the machines can only get so close without putting too much pressure on them.

Then they spray tar down to help the new layer of asphalt stick to the existing and help seal out water. If they don't spray tar down on old surfaces, asphalt tends to stick to itself and will hump up and become uneven when the guys roll it to compact it and smooth it out. You still have to slow gradually to stop this from happening. It's why when you drive down the road on a new street and you feel little bumps, often times you can't even see them. But it's because the rollers are stopping and the asphalt is developing little humps where they are pushing the material ahead of them as they compact like a little wave. And if they don't seal out the water well, if it ever gets between the layers and freezes, the top layer will just buck up and crumble...and you have a pot hole. Why they are along the edges the most, because the water gets in between the sidewalk and asphalt and runs underneath the new layer. Or sometimes it can get between the seams of the new asphalt, where one strip meets another if they don't match them well.

Parking lots, and country roads would let this crew do many more times repavement than a street like this. Because of the sidewalks, man holes, constricted lane of movement, and having to maintain the height of the road to maintain the flow of water.

Country road they'd just put another layer of asphalt down and then put approaches (basically a gradual ramp) on the other roads and driveways so cars can get onto it. No grinding, no sidewalks and stuff to worry about. Or if the road is really bad. They'd put one layer to fill in all the holes, then another on top of that.

Cannonball

asynchronice says...

Ya, except for when someone who CAN afford to live in that house moves in, the pool is scuffed/scratched to shit. Thanks for not littering, but meanwhile I've got to repave the pool.

And thanks for the skater philosophy. SO DEEP, MAN. Like the economy man, you know ?

Peak Oil in T-11 Years: Straight from the horse's mouth

bcglorf says...


Convincing people to purchase new alternate fuel automobiles (or horses) would take a lot of time.


No, if batteries are improved enough to make electric cars cheaper than gas cars the problem will be trying to build them fast enough.


But personal transport is not the biggest issue.


Transportation is nearly the only issue and without it our oil usage is barely a novelty. More over, ANYTHING powered by oil in a tank can be replaced with a battery, we just need to make them the cheaper alternative and we're getting close(and any oil price increases automatically bring us closer).



The investment in infrastructure related to oil goes beyond just pipelines from oil fields to refineries to automobiles. Think of where your bananas will come from? How do they get to you now?

On a diesel powered tanker that could save money running off of batteries if they worked well enough for electric cars.


How many miles do the cheap products on Walmart shelfs travel once they leave the sweat shop? Most of the products we use and eat every day depend on that oil-powered infrastructure.

And that oil power is ONLY used because it is cheaper than using batteries. The same reason cars run off gas because it is cheaper. Build a battery that makes cars cheaper, and everything bigger than cars is cheaper to run off them as well.


Even the highways those products go by to reach you, once they are taken off ship, are made from oil. How will these roads be maintained and repaved when the main component has become scarce?

If we aren't burning oil for fuel we have tens of thousands of years worth of oil for small purposes like paving highways.


It means a massive social and political changes which will take a generation to even begin to implement.


It absolutely does not. There is no social(nor political) attachment to oil at all, only to personal automobiles(and oil revenues for oil producing nations). People don't care much what powers them as long as they work. We are just a better battery away from electric cars being superior to gas driven ones in every way.

Peak Oil in T-11 Years: Straight from the horse's mouth

notarobot says...

Convincing people to purchase new alternate fuel automobiles (or horses) would take a lot of time. As it stands most alternatives are still quite expensive, while household income is on a steep decline. But personal transport is not the biggest issue. It gets more complicated then that.

The investment in infrastructure related to oil goes beyond just pipelines from oil fields to refineries to automobiles. Think of where your bananas will come from? How do they get to you now? How many miles do the cheap products on Walmart shelfs travel once they leave the sweat shop? Most of the products we use and eat every day depend on that oil-powered infrastructure. Even the highways those products go by to reach you, once they are taken off ship, are made from oil. How will these roads be maintained and repaved when the main component has become scarce?

The end of oil means a lot more then just having to look closer at that electric car. It means a massive social and political changes which will take a generation to even begin to implement.



>> ^bcglorf:
>> ^notarobot:
^ Except that consumption rates will keep growing, even after the peak.

Unless some impossible breakthrough like, say, electric cars becoming economical happens. Then consumption will drop near zero. If arable land for horses was projected from usage 100 years ago we'd have had a 'crisis' of insufficient grass for horses.

Rodney Mullen Rodney Mullen Rodney Mullen!!11!1twelve!11! (best of)

Krupo says...

They just repaved a nearby street so some kids were using the smooth-as-glass pavement for practice. I can only imagine how many wipeouts and instances of road rash were incurred getting skills up to this level.

Much more entertaining than the kids in the road, although there was something amusing about watching the wipeouts too.

If Quagmire doesn't give you your 100, this one should.

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