California Company Hopes To Pave The World's Roads With Recycled Plastic

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Most single-use plastic items cannot be recycled and end up in landfills (Credit: Plasticfreechallenge.org)

The invention of plastic has been a double-edged sword for humanity. While the cheap, versatile material has made life convenient, it is virtually indestructible and takes centuries to decompose. Since avoiding plastic is impossible, companies worldwide are coming up with innovative ways to repurpose the millions of tons of polymer waste that end up in our landfills annually. Among the latest is California-based TechniSoil Industrial, which has devised an ingenious way to reuse plastic waste to repave roads.

Road resurfacing is an expensive undertaking that starts with using special equipment to extract and grind the topmost 3-to-6 inches of asphalt. Since the recycled material is not strong enough to use on its own, half of it is discarded and replaced with fresh hot asphalt. The combined product is mixed with bitumen — a sludge-like petroleum residue that acts as a binding agent — and relaid on the surface. Repaving a single lane mile requires 42 truckloads of new material and hauling out a similar amount of unusable waste.

TechniSoil's Neo binder replaces petroleum-based bitumen with repurposed plastic (Credit: TechnoSoil)

TechniSoil's process is both streamlined and sustainable. Four large construction vehicles work in unison to extract the top road layer, grind it for recycling, and mix it with the company's Neo binder — liquefied polymer made by chemically recycling discarded plastic bottles and other single-use containers. The blended product is instantly deposited back on the road, paved, and rolled over. Given that each lane mile requires the equivalent of 150,000 plastic water bottles, wide-scale implementation of the product could make a substantial difference to the world's plastic pollution.

“The advantage with recycling in place is that we avoid all of the truck traffic in and out of the construction zone,” Sean Weaver, the president of TechniSoil, says. "That eliminates the emissions from those trips and makes it faster to complete the job. We can do this work very seamlessly at night. The standard process requires heat, but the new process works cold, saving more energy."

Plastic-repaved roads are also more resistant to potholes and cracking and last about three times longer than ones resurfaced with standard asphalt, saving cities and states a substantial amount of money. “Traditional asphalt roads rely on rock for the strength of the road,” Weaver told Fast Company. “With our pavement, it relies on the matrix of a plastic binder for the strength, and the rock is simply a filler.”

Technisoil's Neo binder has proved to be extremely effective in pilot projects with the California Department of Transportation (CalTrans) and the Los Angeles Bureau of Street Services (StreetsLA). The former has already slated the eco-friendly method for repairing highways throughout the state, and StreetsLA also anticipates incorporating Neo binder in future paving projects in Los Angeles. “This is an exciting technology and a sustainable technology,” said StreetsLA Assistant Director Keith Mozee, “And it’s something that we believe going forward could be game-changing if we deploy on a large scale.”

The California company is not the first to use plastic waste to resurface roads. Dr. Rajagopalan Vasudevan, a chemistry professor in India, came up with the idea in 2001. He has since convinced officials to resurface over 9,900 miles (16,000 kilometers) of highways in his home state of Tamil Nadu with plastic waste. The technology has also been used in varying degrees on roads in the Netherlands, Indonesia, England, and South Africa.

TechniSoil's streamlined process being applied on highway 162 in Oroville, California (Credit: CA.gov)

However, not everyone is convinced that plastic roads are the solution to eliminating polymer waste. Some experts assert the the toxic fumes released when plastic is liquefied could be harmful to humans. But Dr. Vasudevan maintains that since the recycled polymer only has to be heated to 338° F (170° C), no harmful substances are released. The expert says, “Plastic decomposes to release toxic fumes only if it is heated at temperatures above 518° F (270° C). So there is no question of toxic gases being released."

There is also concern that the road polymer will eventually disintegrate into microplastic particles and enter our soil and waterways. However, experts say that is unlikely since the blend of asphalt and liquefied plastic is extremely resilient to light and heat.

Weaver is undeterred by the naysayers and stongly believes that his technology may help solve the world's plastic pollution crisis. The CEO says, "We’re turning something meaningless into the single most valuable piece of infrastructure. We can consume all of the world’s waste plastic into our system, and we can do that within the next eight years."

Resources: Neopava.com, Plasticstoday.com, Cnet.com, Dailyadvent.com

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293 Comments
  • yaso_1
    yaso_1over 3 years
    Plastic is an inexpensive material that does not require a high cost in manufacturing, which helps the products of that material spread widely, as well as being lightweight, which allows it to be easily transported from one place to another.
    • ghu_ou
      ghu_ouover 3 years
      Wow, it's a very good solution, plastic is harmful to the environment as well as humans and animals What if we could convert the huge amounts of plastic waste in the world into a new type of usable material??. The idea of ​​recycling is impressive, it will not harm humans or animals.
      • tigejefa-161314723827
        ‏Unfortunately, many overlook the harms of using plastic to store hot things, especially food and drink. Studies have shown that plastic interacts with heat, especially that contains "dioxin", and results in severe risks to human health. The reaction results in the leakage of harmful substances into the food or drinker, which leads to For serious illnesses.
        • aryam_77
          aryam_77over 3 years
          It is considered an environment-friendly and long-term idea. And exciting that It was also in South Africa, Indonesia, the Netherlands and England
          • jowharah_bader
            jowharah_baderover 3 years
            There is a lot of people throwing plastic but they don't know how much damage is, especially to the oceans and seas, and these places,, Also, Im sure there are alternatives to plastic!.
            • mint_maniac
              mint_maniacover 3 years
              This is a bad idea. Saving the turtles is important, but plastic is highly flammable, and this could hurt us humans. It would be fun though, because we would be saving marine life, and other animals.
              • iiixxrianxxii
                iiixxrianxxiiover 3 years
                I honestly think that this is an brilliant idea and that they were really think outside of the box! Great job! A+
                • bangchannnnn
                  bangchannnnnover 3 years
                  Well I will admit I was completely forced to read this for school but its an ok idea ig
                  • curiouskat
                    curiouskatover 3 years
                    This is a really good solution to solve the plastic that is wasted! Every year, a lot of plastic is wasted and ends up in landfills or in the ocean. The ones that end up in the ocean can harm a lot of animals! These pieces of trash only end up there because of littering and old landfills that were built near the water. If less plastic waste ends up in the landfills, then less trash will end up in the ocean. Since there will be less trash in the ocean, not as many animals would get hurt. This could help increase the population of ocean animals! It is also better for many other living beings or animals that eat fish or aquatic animals. #Savetheplanet #ReduceReuseRecycle
                    • mlbxv3
                      mlbxv3over 3 years
                      This work is very beneficial to the world and humans and may facilitate a lot of work