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GPS and batter to fight potholes

05.11.2012

Two novelties for combating potholes on the roads are proposed in the USA.

A company in Boston is building an information network that, without human intervention, marks road irregularities on a map of the city. It uses the fact that many drivers have smartphones that have GPS and accelerometers. The phone with the appropriate program loaded on it, being in the driver's pocket, feels the bumps in the road, using GPS immediately notes exactly where it felt the shaking, and sends this information to the Internet on a map of Boston. Knowing where the potholes are, they can be patched.

A group of students at the University of Cleveland have developed a dry mix for temporary road repairs that, when diluted with water, forms a kind of batter. It has the properties of a so-called non-Newtonian fluid: with a slow impact or without any impact on it, it flows almost like water, and with a sharp impact, it behaves like a solid body. If you fill a pothole with this mixture, it quickly flows into all corners of the recess. When a wheel of a speeding car runs over a road defect filled with such material, under its impact the “dough” instantly hardens, turning out to be no weaker than ordinary asphalt. The exact composition of the substance will still be patented, so the authors are silent about it. The mixture withstands frost and road salt, is microbially degradable and environmentally friendly.

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Random news from the Archive

Surface defrosting in a second 11.09.2019

A group of researchers from the University of Illinois at Urbana-Champaign (USA) and the University of Kyushu (Japan) have developed a method for very fast and efficient removal of ice from surfaces, which consumes less than 1% of energy and copes with the task a hundred times faster than traditional defrosting methods.

Instead of the usual defrosting, in which all the ice melts from top to bottom, starting from the top layer, scientists have developed a method in which ice melts ice "from the inside": at the junction of ice and the surface. So in the lower layer water is formed, on which the ice cap slides.

The researchers decided to develop a new method of defrosting because current methods consume huge amounts of energy in refrigeration systems due to the need for periodic defrosting and the energy systems of buildings. According to the authors, the biggest source of inefficiency in conventional systems is that most of the energy used to process "antifreeze" is used to heat other components of the system, rather than heating ice or ice.

So the scientists proposed to apply a pulse of very strong current to the place where the ice and the surface meet to form a layer of water. To ensure that the pulse reaches the correct space and does not affect the top layer, a thin coating of indium tin oxide (ITO), a semiconductor film often used for thawing, is applied to the surface of the material. Gravity does the rest.

To test their method, the scientists thawed a small glass surface chilled to minus 15,1 degrees Celsius - about the same temperature in the warmest parts of Antarctica - and minus 71 degrees Celsius - which is even colder than in the coldest regions of Antarctica. . A test with very low temperatures made it possible to check whether the new method can be applied in the aerospace industry. In all tests, the ice was removed using a current pulse in less than one second.

The group has yet to test their method on more difficult surfaces, such as aircraft wings. But this is a matter of the near future.

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