Saturday , July 24 2021

Roader tries to produce a stronger surface than recycled plastic



Total plastic made from the 20th century. In the 1960s, not 10% were processed. Most often, plastic only emits and falls into landfills. Some plastic waste is dumped in the wild, from where it can reach the river, and from them – to the sea. When we get better, the problem of plastic waste will be even worse. For example, this year there must be around 380 million. tons of plastic, therefore, three times higher than bitumen, mainly used for the development of world roads – producing 120 million per year. tons.

These materials have similarities. Plastics are made from petroleum products, and asphalt is a by-product of oil refining. Both are polymeric – they consist of long molecules that have a strong relationship. This ensures the strength of the plastic, contributes to its durability. Such features are good for road users too. When laying the road, hot asphalt strengthens the aggregate of crushed stone and stone and produces a layer, usually referred to as bitumen. All of this encourages people to think: why not replace one polymer with another?

Products made from recycled plastic, such as gutters and sewer pipes. Now interested in using it on the road. On September 11, a 30-meter long bicycle trail was opened in Zwolle, the Netherlands, with 70 percent bicycle lanes. recycled plastic, and what remains is polypropylene. In this section, a new product, PlasticRoad, is being developed, which together with the French French oil and gas company Total was developed by two Dutch companies – the KWS road construction company and manufacturer of plastic pipes Wavin.

PlasticRoad is a prefabricated product. The factory-made segments that are delivered are placed on a substrate that is properly prepared like sand. Segments are made empty, they can be inserted into drainage systems, gas pipes or power lines. Parts of 2.4 meters long and 3 meters wide are made for the Zvolė project. They are equipped with sensors to measure temperature, bending and output of water in the drainage system. Nearby, Githorne, another experimental bicycle lane is underway.

Not only durable, but also smart

If the idea fails, the inventors expect it to be developed and produce a segment made of recycled plastic. There will be rows of hiking tracks, parking lots, train platforms. Finally, it is planned to produce segments and roads. They can be equipped with sensors to monitor traffic. In the long run, contours on plastic roads can be used to support autonomous, electrically powered transportation.

According to the company, prefabricated plastic roads must serve 2-3 times longer than usual. Prices will also decrease, mainly due to the fact that roads can be built almost three times faster. Slippery layers, including debris, traditionally used for road construction, can be included. In addition, the old modified segments can be recycled. But engineers will monitor how the trail will be wear-resistant, and whether the hole creates resonance that will cause this road to cause too much noise.

Recycled plastic can also be used in other ways – to mix it with hot asphalt for asphalt production. Soon, like the sidewalk will be placed at the University of California, San Diego, a campus to test several specially designed roadside plastics developed by the British company MacRebur. According to Toby McCartney, 2015, the company, which has founded this company with a group of coworkers, all the mixes are made of plastic that is difficult to recover, which often reaches the landfill.

MacRebur plaster is cleaned, scraped and finely chopped into shavings or granules. When laying or repairing roads, it is planned to carry out this work on site, so that local roads can be built from local waste. Each mixture can contain about 20 different polymers, adapted to specific surfaces. One mixture may match the bus lane, ie y For heavier transportation, others will provide greater flexibility in arcs and because lateral force wheels, tense surfaces may be lost, for example in transport rings. This layer can also be applied to a lot of heat or cold. And because plastic is filled with small holes where water enters the surface, the sidewalk is damaged, modifying the asphalt can reduce the hole.

The company's plastic blends have been used for road construction, car parking and airport runways in various countries. The oldest project is probably the road in Cumbria, northwest England, where trucks often travel. He needs a new cover for about six months, but, according to T. McCartney, the condition is very good after being mixed in plastic two years later. After refreshing the cover, the old one can be recycled again.

Cleaning and sorting plastic made from different polymers can be very expensive, especially for low-value products, such as packaging. But T. McCartney says that changing bitumen is cost effective because, for example, in tons of tonumen UK can spend around 400 pounds. And for standard walkways, additives made from recycled plastic add 300-350 pounds per tonne. Addition of additives does not require the right amount of bitumen, which can save you money. Now add-ons are replaced with 5-10% asphalt, but some can be increased up to 25%.

T. McCartney has come up with accessories specifically for recycled plastics, seeing how holes are sometimes handled in India. The collected plastic waste is poured into a hole, dipped in diesel and burned to form a solid mass. This is a rough choice that pollutes the environment, but by helping to solve problems. Sometimes in India, crushed plastic is mixed into asphalt and road construction.

Australian travelers also began using recycled plastic. In Melbourne's suburbs in neighboring this year, a 300-mile section of Rayfield Prospect is completed from material called "Layered". This produces more than 200 thousand processed. plastic bags and wrappers, destroyed 63 thousand. glass bottles and used paint from 4.5 thousand. printer cartridge. After mixing all the components, 50 tons of recycled asphalt were produced, and a total of 250 tons of road was made. The characteristics of this road will be assessed.

Stuart Billing, from Downer, who took the floor, said the cost of building roads from recycled materials is the same as traditional ones. However, it is expected that roads will be used longer and are more resistant to heavy traffic.

Craigiebernay officials estimate that the amount of waste not stored at the landfill will be spent on the Rayfield Prospect trip which has been built into a dumpster for the past ten years. The local council will most likely receive complaints about road conditions, especially in the pit. And in Australia and elsewhere, households may be sorted and recycled to get more plastic if they know that they will be able to travel on smoother roads.


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