Natural-gas company Chesapeake Appalachia has installed a new technology called Mechanical Concrete on some of the steepest, most heavily trafficked roads on the Marcellus Shale in West Virginia. Made of used tires stacked into vertical cylinders and filled with aggregate, the installation creates a foundation for roads that are "virtually indestructible" despite constant use by heavy trucks, says civil engineer Samuel Bonasso, who patented the technology. "It's cost-effective, it's fast and it gets the results we need," Bonasso said.

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