EMPA’s robotic arm laying a string layer
By Chris Young
The new method sees stacked layers of string and asphalt create more sustainable roads.
A team of researchers in Switzerland has demonstrated how a robotic arm can lay patterns of string to bind asphalt together for a more sustainable roadbuilding process, a New Atlas report explains.
The method would remove the need for environmentally damaging bitumen, and would also make it easier to recycle road materials.
Researchers at the Swiss Federal Laboratories for Materials Science and Technology (Empa) got the idea from an art and science project that created pillars using a mix of gravel and string, an EMPA press release explains.
The pillars were made by interlocking gravel with a thread that held the structures together. They reached heights of 80 cm (2.6 ft), and in pressure testing, they were shown to withstand loads equal to 20 tonnes (22 tons).
The scientists used this project as a starting point. For their research, however, they used string to reinforce layers of road asphalt. If they find a way to scale the method, it could provide a great environmental advantage over the use use of bitumen, which is extracted from crude oil.
Continue reading… “Robotic Arms Build Roads by Binding Asphalt with Strings”
