Bacteria can prevent the formation of pits road
For the safety of motorists and pedestrians, winter icy road de-icing liberally sprinkled with solutions. Unfortunately, they have a negative effect on the ice layer is under concrete, destroying it, and forming the pit road. Researchers at Drexel University in Philadelphia found that some groups of bacteria can eliminate this side effect, and even make the roads more durable. Adding them to the existing solutions can be stopped and the formation of damaging agents induce the formation of a strong cement.
Typically, anti-ice contain an enormous amount of calcium chloride, which is reacted with steps contained in concrete roads calcium hydroxide and calcium provokes oxychloride. It extends inside the concrete and causes cracks due to which the road and having the pit.
Researchers in Philadelphia have found that adding a composition of concrete roads bacterial strain Sporosarcina pasteurii and nutrition they need, this effect can be avoided. Interacting with antifreeze solutions, they are able to convert the calcium chloride to calcium carbonate, which is a natural cement and imparts additional strength to the road. In the study, a series of concrete samples was established, sustainable solutions to the anti-ice. They were exposed to calcium chloride for 28 days and found that the concrete content Sporosarcina pasteurii bacteria does not destroyed, but becomes stronger. Due to the formation of particles of natural cement, concrete road became better able to withstand the acoustic vibrations arising from passing cars.
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