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Although the production of carbon fiber goods may be steadily increasing, recycling the material still remains challenging. Thanks to research being conducted at Washington State University, however, it may soon be possible to grind up carbon fiber waste and use it in new-and-improved pervious concrete.
First of all, what is pervious concrete? It's highly-porous concrete that stormwater run-off can drain straight through, passing into the soil underneath. Not only does it help prevent flooding, but it also reduces aquatic pollution – with traditional non-pervious concrete, the water runs the length of the road, accumulating more and more pollutants along the way, before going down a storm sewer and into the local waterways.
Unfortunately, though, because it's so porous, pervious concrete isn't as durable as its regular counterpart. That's where the carbon fiber comes in.
Led by Karl Englund and Somayeh Nassiri, a Washington State research team used an inexpensive mechanical milling technique to grind up scrap carbon fiber provided by Boeing. When that ground carbon fiber was added to the team's existing pervious concrete mix, the durability and strength of the resulting material was greatly increased.
"In terms of bending strength, we got really good results — as high as traditional concrete, and it still drains really quickly," says Nassiri.
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Bestwill Composites Co.,Ltd
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