Road snow do not worry about conductive concrete material will achieve the road from the snow
Most of the streets of the east coast of the United States are covered with 42-inch deep snow, after a history of rare blizzard attacks. Even after a few days of snowstorms, these cities are still trying to clean the streets and sidewalks above the snow.
Chris Tuan, a civil engineer from Nebraska State University, came up with a better way to clean up the snow. With the aid of the Federal Aviation Administration (FAA), he created a conductive concrete that could carry enough electricity to melt the snow, even in the most raging Blizzard The
This mixture includes basic commercial concrete (cement, sand and water), but Tuan will be 20% of the material with steel scrap and coke powder powder, the two kinds of materials are industrial waste. When this kind of finished conductive material concrete material is connected to the internal steel by connecting the internal power supply, it can generate heat and flow to the surface of the commercial concrete.
Tuan has now produced a 200-square-foot test sheet and, on the outside of its office, connects the conductive product concrete sheet to a 120-volt alternating current to test how the material will work.
If this test is successful, the FAA will use this conductive commodity concrete as a building material for the airport apron, hoping to minimize the delay in flight during the winter Blizzard hit. In addition to the airport, this research can also be used in the city.
In 2003, Tuan and his electrical engineer colleague LimNguyen produced a test version of the conductive commodity concrete, which installed 52 of these conductive commercial precast panels on a 150-foot bridge. "We knew that there were many bridges that were so cold that they were exposed to ice and snow at the top and bottom of the bridge." Tuan spent five years getting the experimental results of conductive concrete, and published the results Cold area of engineering journals, proved that this is a very promising material. The bridge with the experimental material successfully achieved automatic deicing, and in the three days of the storm for the conductive commercial concrete supply only spent 250 US dollars, which is much better than the use of snow or snow melting salt.
Since then, Tuan has been committed to making this conductive commodity concrete material more affordable, which is also more conducive to a wide range of promotion and use. He replaced the costly conductive material with synthetic carbon as industrial waste, which significantly reduced the cost of conductive commercial concrete, from $ 600 per cubic meter to $ 300.
But compared with the ordinary commodity concrete material is still a small number, after all, the general commodity concrete material per cubic yards only $ 120. In fact, Tuan does not recommend all roads to use this conductive commodity concrete to build, he thinks good steel used in the blade, this conductive commodity concrete should be used in the storm after the high accident special sections, such as crossroads, slope Road and poor mountain road conditions.
Want to make this conductive goods made of concrete roads can melt snow melt ice, the key is to come in the storm before the day ahead of warmth. "If you have been preheated in advance, you can melt immediately when the snow falls on the road, so that it will not form snow." Tuan explains the working principle of conductive commodity concrete and adds that even if it touches the goods The roads made by concrete are also safe. The amount of road charge depends on the specific conductive product concrete coverage area, the minimum charge, but 48 volts.
The use of this conductive commodity concrete to make road construction materials, the benefits will become increasingly apparent. Tuan According to the present experiment, the operating cost per square foot of conductive concrete concrete road is only 2 cents, and its maintenance costs are almost no, because people no longer need to use those who have corrosive effect on the road chemical deicing agent. Tuan expects that after conducting further testing, this conductive material concrete material can be recognized by the FAA, he is very confident about this. "After I used this conductive material concrete for bridge construction in 2008, I was confident of it because it was mature enough.