In Maine, contractors are “blowing up” bridges: They are inflating hollow carbon-fiber tubes on-site, bending them into arches and infusing them with resin. Filled with concrete, the bridges are ready to be decked, backfilled and paved. Acting as bridge arches for short spans, carbon tubes are inflated and filled with concrete by workers in Maine. Related Links: Dozens of Test Projects Later, Advocates Still Have Durable Dreams Material for Milk Containers Now Supports Railroad Traffic Brit E. Svoboda, chief executive of Advanced Infrastructure Technologies Inc., which owns the rights to the system, is hiking around the U.S. to promote its
Arch dams, classically curved monoliths situated in narrow valleys, are not as common as other types of dams, such as embankment dams and gravity dams. ENR takes a look at some of the biggest arch dams in the world, both completed and under construction.