Road Makers Turn To Recycled Plastic For Tougher Surfaces (economist.com) 109
Recycled plastic is already used to make some products, such as guttering and sewage pipes. Now attention is turning to roads. From a report: On September 11th in Zwolle, a town in the Netherlands, a 30-metre bicycle track made from 70% recycled plastic and the rest from polypropylene was opened [Warning: the link may be paywalled; alternative source]. It will be used to test a product called PlasticRoad, which is being developed by two Dutch firms -- KWS, a road builder, and Wavin, a firm that makes plastic piping -- in partnership with Total, a French oil-and-gas firm. PlasticRoad is prefabricated in a factory as modular sections. The sections are then transported to the site and laid end to end on a suitable foundation, such as sand. Because these sections are hollow, internal channels can be incorporated into them for drainage, along with conduits for services such as gas and electricity. For the Zwolle project, sections that were 2.4 metres long and 3 metres wide were used. These were fitted with sensors to measure things such as temperature, flexing and the flow of water through the drainage channels. A second pilot cycleway is being built in the nearby town of Giethoorn.
If all goes well, the inventors hope to develop the idea and make the sections entirely from recycled plastic. Paths, car parks and railway platforms could follow. Eventually, sections for use as actual roads are planned. These could contain sensors for traffic monitoring. In time, the circuits in the plastic roads might extend to assisting autonomous vehicles and recharging electric cars wirelessly. Prefabricated plastic roads should last two-to-three times longer than conventional roads and cost less, the companies claim, mainly because construction times would be reduced by almost two-thirds. Anti-slip surfaces could be incorporated, too, including crushed stones which are traditionally used to dress road surfaces. The sections, when replaced, can also be recycled. But engineers will be watching to see how the track stands up to wear and tear and if the hollow structure causes resonance, which would make such a road unduly noisy.
If all goes well, the inventors hope to develop the idea and make the sections entirely from recycled plastic. Paths, car parks and railway platforms could follow. Eventually, sections for use as actual roads are planned. These could contain sensors for traffic monitoring. In time, the circuits in the plastic roads might extend to assisting autonomous vehicles and recharging electric cars wirelessly. Prefabricated plastic roads should last two-to-three times longer than conventional roads and cost less, the companies claim, mainly because construction times would be reduced by almost two-thirds. Anti-slip surfaces could be incorporated, too, including crushed stones which are traditionally used to dress road surfaces. The sections, when replaced, can also be recycled. But engineers will be watching to see how the track stands up to wear and tear and if the hollow structure causes resonance, which would make such a road unduly noisy.
Re: (Score:2)
Sometimes there is no other option.
None, apart from re-using/refilling it.
Re: (Score:3)
Recycling is the worst option of all.
1: Reduce
2: Reuse
3: Recycle
Recycling is not reusing. Recycling takes tons of energy to recover material from something and repurpose it. It often creates an inferior product.
Re: (Score:2)
It maybe a inferior product, but if it takes less energy to generate then starting from scratch you are still coming out ahead.
Re: (Score:2)
It maybe a inferior product, but if it takes less energy to generate then starting from scratch you are still coming out ahead.
Many forms of recycling take more energy than working from raw materials. Such recycling is only commercially viable thanks to the high charges for landfill and dumping of used goods.
Re: (Score:2)
Many forms of recycling take more energy than working from raw materials. Such recycling is only commercially viable thanks to the high charges for landfill and dumping of used goods.
Care to point one, or a couple of them out?
I never have heard about such a thing, how should that be physical possible?
Re: (Score:2)
I was going to give you a serious list of examples, but then I noticed your username.
Just in case OTHERS want to know, look at your county's website for recycling centers, then check them out and see what they won't take. Then search for "recycle" and those things. Plenty of products are created in such a way that it's too costly, or outright infeasible, to recover the materials. A classic example is a juice box. Cardboard, plastic, foil, and lots of glue.
Re: (Score:2)
Nevertheless the cardboard and the plastic gets recycled ...
Or do you mean a juice container? Made from the stupid mixture of cardboard and plastic? They actually get recycled, too. But into park benches and other silly stuff.
Re: (Score:2)
No, they typically don't get recycled because of all the layers of different materials all glued together. It makes no sense to recycle them to recover the materials. Look it up. "Recycle juice box".
In the 90s, people started complaining about this packaging, and a few companies in the US started recycling them to prove that it could be done. Yet it's still not feasible to do so, and today most places in the US won't recycle them. If they take them they'll likely end up in a landfill. The most efficie
Re: (Score:2)
Well, they are recycled. Just not to make new tetra packs from them.
However you are right, those things should be forbidden.
Anyway, the parent was more one of those wackos who claims that melting iron/steel costs more energy than melting ore. Or similar for glass. There are so many people here who thing melting bottles costs the same energy as melting fresh glass from sand.
Re: (Score:2)
60 to 80% of them are NOT recycled in any way.
Re: (Score:2)
60% - 80% of what?
Of course it gets recycled, same for steel and aluminum. At least here in Europe.
Re: (Score:2)
It maybe a inferior product, but if it takes less energy to generate then starting from scratch you are still coming out ahead.
It almost never does. Recycling only makes sense when the material is rare or valuable, or when the method of recycling is dead simple and cheap compared to making new.
I'd say there's about an order of magnitude of importance between each of reduce, reuse, and recycle. .9% (or a whole 1%) of the focus being on recovering materials from the thing when its functio
That is, 90% of the focus should be on not using and wasting so much shit.
Then 9% of the focus should be on fully utilizing the shit you do use
With
Re: (Score:2)
How is that not recycling?
Because classically, "recycling" means putting it back through industrial processes to manufacture a new item. The extended meaning of recycling to cover reuse, repair and repurposing inadvertently puts carbon-intensive collection and reprocessing of glass on an equal footing with not putting the glass in the bin at all and using it to store things instead of silly plastic Tupperware items.
Re: (Score:2)
Technically, this doesn't meet the strictest standards for "recycling". It's re-use, which is better than throwing away, and is casually called by many people "recycling", but it doesn't actually form a cycle.
Recycling should form a closed loop, with the molecules being recycled moving through the cycle over and over again. The idea is to mimic natural biological systems in which matter is reused over and over again with an input of energy and an output of entropy.
So the big question is: what happens to t
Mulched rubber tires (Score:2, Insightful)
How is this different?
Re: (Score:1)
Re: (Score:1)
"Eventually, sections for use as actual roads are planned."
Re: (Score:2)
this is for bicycling trails
Bicycles wear surfaces just like autos do. Sometimes even more. We had an abandoned Nike missile site near me that was used for decades by four-wheel drivers. No problems. The county closed off motor vehicle access and turned it into a mountain bike trail park. Now the place is seriously rutted and the soil runoff into nearby salmon creeks is significant.
Re:Mulched rubber tires (Score:5, Informative)
Um, no. Just no.
You're talking about non-paved surfaces. This is about paved surfaces.
On paved surfaces, the data says that adding rubber/plastic recycled materials improves durability. Overweight trucks and plenty of them, will still erode them. High traffic volume, wide ambient environment, poor road beds, all will do their share to screw up paved surfaces. Bikes, by their nature, do not present the weight and lateral surface impact that heavy trucks present.
Re: (Score:2)
adding rubber/plastic recycled materials improves durability
OK. But plastic/rubber roads will still wear. And we don't need to change the subject to 'overweight trucks'. Bicycles will wear a road surface, cars will wear a road surface and trucks will wear a road surface. The plastic and rubber might reduce that wear but the resulting debris from all uses will end up floating in the oceans and get into our food supply. No thanks.
Re:Mulched rubber tires (Score:4, Interesting)
Still, no.
You're concerned over 200lbs distributed over two tires. I'm talking 80,000 pounds distributed over 18 wheels, sometimes more and less.
I, too, don't want to see plastics in the oceans. Roads aren't paved in the oceans. It's true that particles are leached into aquifers. We don't have good data on how much, what kind, deterioration, and more. If you were looking to stanch plastic pollution, talk to your local grocer, and encourage products made from paper, or better still, re-usable packaging that requires little cleaning before re-use.
More effective plastic stanching is possible. It's because plastics compressed as described are so strong, that they'll last much longer as paving products, although all the data isn't in yet.
There are experimental paving stretches across the US. Some involve plastics, tires, stone mill grinds, and many more. Let's see what works best before condemning them. I want to stanch plastics pollution as much as possible. First things first, please.
Re: (Score:2)
To add to your comment, it's not just 80000 pounds over 18 wheels, it's that wear on a paved surface by a vehicle is a function of the FOURTH POWER of the axle weight.
So while actual weight presented on each wheel would be 44x that of a bicycle by your example, actual road wear is 62000000x worse for a truck compared to a bike.
Re: (Score:2)
Re: (Score:2)
Likely true-- the mix is all important. It's easy to fudge one ingredient for a more expensive one, when no one's looking, or knows hot to evaluate the mix.... just like regular asphalt. Densities are all important.
Re: (Score:1)
Wear on the road is a factor of the vehicles weight. Therefore while a bicycle might wear a road, it is insignificant to the wear caused by a loaded dump truck.
Here, cause I know your going to start whining:
https://streets.mn/2016/07/07/chart-of-the-day-vehicle-weight-vs-road-damage-levels/
Re: (Score:2)
Re: (Score:2)
Because taxing transit of goods at this level would raise prices of staple products excessively and end up being a regressive tax that primarily affects the poor. Maybe. I'm not actually sure if that would be the result, but it would be a large change that nobody will understand the ramifications of until it's too late.
Re: Mulched rubber tires (Score:1)
Re: (Score:2)
I'm going to pass on a web site that includes "justice" and "empowerment" as factors in road maintenance. I'm also going to ignore anyone who doesn't actually look at tire loading per square inch as a more important factor than big trucks vs little trucks.
Re: (Score:1)
Re: (Score:2)
Damage proportional is to the fourth power of a vehicle's weight, this is one reason why we have weight stations for trucks.
Re: (Score:2)
Its probably even worse.
Re: (Score:2)
Re: (Score:2)
On September 11th in Zwolle, a town in the Netherlands, a 30-metre bicycle track made from 70% recycled plastic and the rest from polypropylene was opened. It will be used to test a product called PlasticRoad, which is being developed by two Dutch firms—KWS, a road builder, and Wavin, a firm that makes plastic piping—in partnership with Total, a French oil-and-gas firm.
Yes I understand a asphalt mixture was discussed later but this material was the focus.
Re: (Score:2)
In India, an engineer has been adding plastic to reduce bitumen as an asphalt component; mostly to reduce waste in landfills.
https://www.theguardian.com/wo... [theguardian.com]
Which sounded great to me until I read the poster's comment below, with their idea of microplastics in the food chain.
Re: (Score:2)
Out of curiosity, did they just add it as a topping, or all through it?
This will DEFINITELY... (Score:5, Insightful)
Re: (Score:2)
Seriously. That was my first thought: as these roads get plowed, you're making piles of microplastics that are washing directly into wildlife and the food stream.
Re: (Score:1)
Re:This will DEFINITELY... (Score:5, Interesting)
Which is nothing but an oil product.
A lot of the volume of blacktop is gravel and sand. Which, when worn down becomes sand. When that gets into water ways, it just settles to the bottom with the other sand. The tar and other heavy petrochemical products do enter the environment, but at a pretty slow rate where they are broken down by biological activity*.
*We had a city park near me that was found to be an old (WWII era) fuel tank farm. With plumes of fuel soaking into the soil. The solution was to remove the sod, till up the dirt underneath and mix it with some specialized bacteria strains and let it sit for about a year. After that, all the petroleum waste was gone and it's now a park again.
Re: (Score:2)
Plastics are extremely long [wikipedia.org] hydrocarbon chains. Thousands of carbons or longer - if you stretched it out, a single PE molecule can be as long as a fraction of a mm. It's this length which makes them so durable and persistent. Bacteria cannot break them down. They remain stable until ionizing radiation (primarily UV light) breaks them into shorter hydrocarbon chains,
Re: (Score:2)
A lot of the volume of blacktop is gravel and sand. Which, when worn down becomes sand.
A lot of the volume is polymers too. Plastic is already mixed in, the difference being is that the quality and grade is tightly controlled as it affects the properties of the road surface.
Re: (Score:2)
In the Netherlands, plowing is rare enough that it won't be a significant factor. Snow deep enough to need plowing occurs maybe 1-2 times per winter, and many winters we don't have snow at all. Mostly the roads are just salted.
The biggest source of micro'plastics' from roads is from tire and brake wear. Tarmac roads also produce microscopic particles from road wear.
Much of this debris collects around the roadside, where the next rainfall will sweep it into the sewer system. The Dutch sewer system is very we
Re: (Score:2)
In the Netherlands, plowing is rare enough that it won't be a significant factor. Snow deep enough to need plowing occurs maybe 1-2 times per winter, and many winters we don't have snow at all. Mostly the roads are just salted.
Maybe in the Netherlands, but in most of North America? Not a chance. To make it clear what the OP is saying, I live in Ontario(Canada). Figure there's 400km between the two of us, for him the plowing could be 1-2 times per day. For us, it can be 1-2 times per hour or more. The winters though the US central states, and north eastern states can be severe. ~9 years ago here in Ontario, we had snowfall amounts of 5.7m(19ft) over a 3 day weekend in the southwestern part of the province, that's actually fai
Re: (Score:2)
Microplastics are not uniquely dangerous. Microscopic anything non-biodegradable can be a problem when it gets into the food chain.
Re: (Score:2)
Microplastics are not uniquely dangerous. Microscopic anything non-biodegradable can be a problem when it gets into the food chain.
Yeah, well the world isn't a safe place either. And if you don't want to develop skin cancer, stay indoors and become a vampire to boot.
Re: (Score:1)
I support paper straws and bags.
What, do we go back to glass bottles instead of what receive our liquids in now?
How about almost all of our devices have plastic in them., what do we do with them. Change all manufacturing globally>
The world, globe now relies on numerous products. What, you going to push everyone back into caves>
You are an idiot, you offer no solutions. You also are too fucking stupid to recognize why it will never happen.
Now, if recycling of all plastic could be achi
Re: (Score:1)
I hope this is a successful endeavor, but I have concerns that the test will hopefully figure out.
TFS did stateverything that the surface could be dressed in gravel. So hopefully that will take care of traction issues from the plastic itself, but also when the traction layer itself wears smooth. Hopefully this will also minimize plastic wearing off and beingreleased into the environment.
Repairable is also a concern. It's not like an asphalt road that can be easily patched. Or maybe it can. I didn't RTFA.
Re: (Score:2)
plastic wearing off and beingreleased into the environment.
There's likely to be some of that. But probably a great deal less than we currently have, with most plastic going unrecycled.
Repairable is also a concern. It's not like an asphalt road that can be easily patched. Or maybe it can. I didn't RTFA.
It being plastic, there might be a simple way using heat & resin to patch a bad spot. Or you lift out a section and drop in a new one, I don't know. But I have my doubts about the greatly reduced construction times these guys claim: most of the effort in building new roads seems to go into preparing the right of way, the
Re: (Score:2)
Why would this help?
Microplastics come primarily from wear and tear of plastic articles, such as polyester clothing. If we make roads out of plastic, tires will grind off bits of microplastic, which will wash off the road.
It WILL help with large plastic waste, which can be recycled. But I see this only making the microplastics problem worse.
Microplastics problem maybe? (Score:1)
This has been done with rubber (not plastic) on our estate in Milton Keynes, UK. When it's done properly it's basically un-noticeable and so far has worn extremely well. I can't imagine doing this with plastic as that's basically a bit stupid given the microplastics 'news' currently in the worlds focus
However there is food for thought - this stuff basically wears down as dust, and even if it does it slowly there'll be a lot granted, but dust is a lot smaller than your evil microbead problem, so much so t
Re: (Score:1)
Where I am from (nebraska). They tried recycled plastic on several large stretches of road on I80 outside of Omaha. The conclusion was the road wore out about 20%-40% faster than normal. UNL and NDOT did several very good writeups on it. The 'wear' factor was mostly from the crushing amount of 18 wheelers that travel along I-80. It was about half the cost (at the time).
Now for a bike trail (which is the use case here)? That could work decently. For automobile roads? It is just not as durable than th
Re: (Score:2)
Oh, when the plastic pieces turn smaller than microplastics they become nanoplastics which have a whole lot of other issues for health and the environment. You would not want to inhale it.
Wear-down of car tyres is known as a significant cause of micro and nano-plastics in the environment. Tyres are usually made of a mix of natural rubber and synthetic rubber - and synthetic rubbers are also plastics, more or less.
Another significant health issue in colder climates is that studded snow tyres wear down paved
Paywall and images (Score:5, Funny)
For those who can't see past the paywall, there are some pretty good images of the road sections here. [google.com]
What really matters: (Score:2)
The things of real consequence here are the cost savings and how well the road can stand up to heavy loads. If it doesn't perform well in those two areas then it will get limited use. It might be exactly what Zwolle wants, Hell it might even be great for all of the Netherlands but for widespread use, one must consider global applications.
Impressive! (Score:2)
A 30-metres long bicycle track made in recycled plastic....
Wait, 30 metres?
Do you want to have flawed data? Because that's how you get flawed data.
Make it at least 3 kilometres long, otherwise all your data will be coming from basically the same exact spot.
Re:Impressive! (Score:4, Informative)
Nano particles (Score:2)
Re: (Score:2)
We call those "plastic pebbles" or "starshine".
Re: (Score:2)
In the Netherlands, gutters are connected to the sewer system, which has rigorous filtering before any water is allowed out.
What could possibly go wrong (Score:2)
"The Plasticman"
A lone venturer comes across a crashed plane containing a body wearing the uniform of the USPS (Uniformed Salsa Plastic Service) with a bag full of plastic water bottles.
He travels down a plastic road, weathered by erosion and sunlight, which chokes him to death before he can reach the town about to be destroyed by plastic beetles. So they die.
Everyone is happy in their plastic ruins.
The End
Why Roads (Score:2)
They eventually want to make roads out of this product if it proves tough enough. Why not try and get driveways and some parking lots made from this instead? Then it doesn't have to put up with the heavy loads a busy road would put on it but still replace asphalt. Then as the product improves it can begin to replace roads.
Bikeways, paths, yes. Roads no. (Score:2)
This is potentially a reasonable application for bikeways and paths, but it's a non-starter for roads. Their claim that adding plastic increases durability is simply nonsense. Road surfaces already contain quite a bit of plastic. Various polymers are mixed into the bitumen in a very controlled way to achieve a wide variety of different grades suitable for different duties, with different road bases, and different environmental conditions.
On a footpath where this stuff doesn't matter as much you can make the
A milestone! This advances microplastic production (Score:2)