pianotuna
Regina, SK, Canada
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free radical wrote:
Romans cut the trees to build their ships.
I searched for any Romans 7 million years ago--but found none.
"The Sahara Desert formed around 7 million years ago, as a great dust bowl sitting where the Tethys sea once soaked. This huge body of water separated the two supercontinents, Laurasia and Gondwana, resulting from the cleaving of Pangea by tectonic forces."
Regards, Don
My ride is a 28 foot Class C, 256 watts solar, 556 amp-hours of Telcom jars, 3000 watt Magnum hybrid inverter, Sola Basic Autoformer, Microair Easy Start.
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manley
Wichita Falls, TX
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Dear God, make it stop please!
2021 F250 XLT FX4 SCREW Godzilla 7.3L
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Grit dog
Black Diamond, WA
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Classic AND classy thread boys!
2016 Ram 2500, MotorOps.ca EFIlive tuned, 5” turbo back, 6" lift on 37s
2017 Heartland Torque T29 - Sold.
Couple of Arctic Fox TCs - Sold
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Fisherman
Angus, Ontario, Canada
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Sometimes I wonder what's in peoples breakfast.
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shelbyfv
TN
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The similar thread in "General" has really jumped the tracks!![[emoticon]](https://forums.goodsamclub.com/sharedcontent/cfb/images/doh.gif "doh")
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blt2ski
Kirkland, Wa
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shelbyfv wrote:The similar thread in "General" has really jumped the tracks!
I don't look at the other sub forums much, had to go find the "other" thread.
Yeah, on can say it's jumped the tracks per say, Even this one is close. BUT......
Both threads frankly, have some thoughtfully posts, no flaming, no antagonizing other people trying to cause an argument per say. ALL involved realizing that positives and negatives exist on the EV subject. One can say the same for "gas vs diesel" in the past when I first joined here 20 yrs ago, " manual vs automatic transmissions". I'm sure we can go on about other subjects too.
At the end of the day, MOST if not ALL of us need and want to learn about a given subject(s). We want honest truths both good and bad about the subject. Then the ability to decide what positives fit my needs vs yours.
I have no problem admitting, current for my use, an EV is out the door. For my wife's driving, an older sister who has an EV, they work well. But until that article mentioning the slave issue, which has been mentioned really quietly.....it needs to get brought up both as a negative, yet from a how can the rest of us try to reduce this that negative part of the equation.
So with this said, keep you posted non flamatory, thoughtful, this and other threads will carry on.
Marty
92 Navistar dump truck, 7.3L 7 sp, 4.33 gears with a Detroit no spin
2014 Chevy 1500 Dual cab 4x4
92 Red-e-haul 12K equipment trailer
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Grit dog
Black Diamond, WA
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I’ve worked with a few dump truck drivers that were smarter than everyone else. Just ask them, they’d tell ya. I guess with so much time to figure out the engineering behind our infrastructure and all other ways of the world it’s no surprise.
Or sometimes they’re just reminiscing.
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valhalla360
No paticular place.
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JRscooby wrote:valhalla360 wrote:
Actually, mandates haven't had a lot of impact. Most of the big jumps in efficiency happened when fuel prices spiked and the customers chose to buy higher MPG vehicles. Mandates without a fuel price spike have typically resulted in circumvention of the rules...Example: the proliferation of the mighty SUV "truck" that is for all practical purposes just a station wagon rebranded.
Mandates don't make a difference? Then why do auto companies fight so hard against them?
Now mandates don't always work as planed. When smog started to get bad, Cali started, other states then Feds followed with mandates to clean things up. (Remember the "road draft tube"? When I saw a explanation of PCV, I put that system on my '54 GMC I6 running in my '58 Chevy Engine bay much easier to keep clean) But when mandate said must clean what came out tailpipe, the technology was either not available or too expensive, so MPG went way down. (Personal example; My wife, in 327 small block powered '67 Nova would get about 16-17 MPG driving to/from work. Replaced with new '73 350 small block, 8 MPG. At same time my '72 half ton, 350 small block ran 16.) And like you say manufactures/buyers changed vehicles offered. Before the station wagon/SUV thing, pickups changed into sedans without deck lids on the trunk. But when high gas price/competition from foreign and more efficient cars caused advances in engine efficiency on smaller models the "fleet average" mandate forced that tech to spread up the line.
Quote:Working in the industry, recycled asphalt is very limited on roadway projects and that's where the vast majority is used. The problem is as the asphalt ages, it "dries out" and becomes less effective as a binder in the asphalt concrete. When it's used, it's typically more for political reasons as opposed to engineering and capped at 5-10%, so as not to impact the quality of the pavement too much. Reducing the amount of virgin asphalt used by 50% but having to repave twice as often, doesn't provide much benefit. Ground up it does make a nice gravel for driveways.
Fact is asphalt has never been a great road surface. If dumped in a fill, tests have shown the oil will leach out, contaminate water. And even if the road is unused the surface will break down, allow water into subgrade.
Over the last couple of decades, in this area, recycling concrete has increased. In the past, a early step in repairing a interstate highway bridge was asphalt crossovers to get traffic off bridge. Now they are using concrete.
About that "nice gravel for driveways". 1 summer I worked my truck and trailer for months, loading millings where suburbs where repaving, hauling into small towns, stopping at the grain elevator to weigh, then tailgating out on the oiled dirt/chipped roads. Little work with skid-steer, blade, and roller, call the streets "improved"
a) The manufacturers fight mandates because it takes time, money and effort to circumvent them to give customers what they really want and will pay good money to buy. They really don't care what they produce as long as it sells and makes a good profit. Plus more often than not, you run into the law of unintended consequences when you apply politically based mandates.
Fuel price on the other hand correlates nicely with MPG increases.
- From the mid70's to mid80's fuel prices spiked. Over the same period the fleetwide average (cars & trucks) went from 14 to 22mpg.
- From the mid80's to the mid00's, fuel prices were back down and held pretty much steady when adjusted for inflation. Fleetwide average actually lost ground to around 20mpg.
- From the mid00's to the mid10's, fuel prices again spiked (inflation adjusted) and fleetwide average went up to just shy of 25mpg.
If you want to improve MPG, increase the price of fuel and there is no need for ineffective mandates. Customers will demand it and manufacturers will provide it.
b) So if Asphalt is such a horrible material, why is it that around 80% of paved road miles are asphalt. Keep in mind Portland Cement Concrete requires burning a lot of fuel to make the cement...leaving behind more asphalt cement from the left overs of a barrel of crude oil to let's not pretend it's a "greener" alternative.
Can you source these tests that show oil leaches out from asphalt? Cars leaking oil onto the pavement can do that but particularly for old asphalt concrete, the vast majority of light oils that would be subject to leaching out are long gone. That's the biggest problem with old asphalt...all that remains after 30yrs are the solids, so it doesn't make a very effective binder.
I do a lot of Maintenance of Traffic Plans. I can't recall ever seeing a Portland Cement Concrete temporary crossover used. Not saying it's never been done but if you came across it, it's very much an outlier.
15-20yrs ago, there was a lot of effort into recycling asphalt concrete and yes, it does get used in small quantities today but mostly as a checkmark of how the project is "green". Usually they wind up using a softer grade of asphalt with more light oils (subject to evaporating into the atmosphere or leaching into the soil) that would otherwise be refined out for other uses to compensate for the low quality of the 30yr old material.
The other problem is you have far less control over the quality of the aggregate (sand & gravel). With asphalt concrete, the aggregate is typically more important than the binder.
So no asphalt is a perfectly good material and it isn't going anywhere as there is no viable alternative for paved roads in the quantities required.
Tammy & Mike
Ford F250 V10
2021 Gray Wolf
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Full Time spliting time between boat and RV
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Grit dog
Black Diamond, WA
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Well stated Valhalla. Spot on.
What part of the transportation industry do you work in?
And if there was ever a PCCP temp freeway x over, there was certainly some very unusual circumstances surrounding it.
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JRscooby
Indepmo
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valhalla360 wrote:
So if Asphalt is such a horrible material, why is it that around 80% of paved road miles are asphalt.
Cost. If the city/states would spend the money to use better materials for roads, the people that scream about leaving kids public debt would come more unhinged than normal. The idea of leaving kids roads that can be used for decades can't fit between the ears.
Quote:Keep in mind Portland Cement Concrete requires burning a lot of fuel to make the cement...leaving behind more asphalt cement from the left overs of a barrel of crude oil to let's not pretend it's a "greener" alternative.
Yes, it takes a lot of fire to make Portland. More than what it takes to heat asphalt to pave the same distance? IDK. But I know all that burning is in 1 location, then the product hauled out to be mixed near where used. 1 stack emissions can be monitored better than when the burning is happening anyplace want to set a portable plant.
Late '90s the local Portland was bought out, and up graded. It burns a lot of utility supplied NG, I'm sure. Also burns over 300 tons a week of ground up tires. Dozens of vans of plastic unloaded for fuel every day. And the old quarry across the highway, turned into a sanitary landfill has a 8 inch line to feed the methane most landfills vent into the burner.
Quote:Can you source these tests that show oil leaches out from asphalt? Cars leaking oil onto the pavement can do that but particularly for old asphalt concrete, the vast majority of light oils that would be subject to leaching out are long gone. That's the biggest problem with old asphalt...all that remains after 30yrs are the solids, so it doesn't make a very effective binder.
First I heard of asphalt leaching, a local construction company bought a big chunk of ground, with the idea of using as a waste fill until up above water level of '93. For about 10 years, dumped a lot of concrete buildings, dirt, tear out from utility repairs, even a few crossover in there. City found oil in the public well, traced back to that field. Spent a bunch of money with a couple of excavators working under city supervision, digging down to virgin ground, sorting asphalt out, and refilling the trench. For the last decade I worked asphalt was added to brush, lumber trash leaves sign of what can't be dumped.
Quote:The other problem is you have far less control over the quality of the aggregate (sand & gravel). With asphalt concrete, the aggregate is typically more important than the binder.
This is true about Portland as well.
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