Bridges are incredibly important, and they are accordingly built typically from concrete. Concrete, one of the strongest, most long-lasting, and most reliable man-made materials on Earth, is an excellent choice for bridge foundations. If bridges were not so strong, they could conceivably collapse at random, which would be disastrous and devastating. While bridges can collapse, and some certainly have, they are the exception, rather than the rule.
However, Americas infrastructure is slowly crumbling, built largely in the 1950s and 1960s. Without the proper maintenance and the lack of funding to properly care for the various highways and bridges, the future of Americas infrastructure could potentially be at risk. The easiest way to remedy this failing is to apply a quality concrete sealer on the concrete bridge foundations.
For concrete bridge foundations, the best concrete sealer would be a silane/siloxane blend. The Ghostshield Siloxa-Tek 8500 is an excellent product that yields excellent results when applied to bridge foundations. Featuring a hydrophobic barrier, the silane/siloxane would block out water, not allowing it to penetrate within the concrete. Once in the concrete, water can remain there until the winter when it freezes until the spring when it thaws these freeze/thaw cycles can lead to incredible damage and cracks, which can crumble even more over the years. The best way to prevent this is to prevent water from entering the concrete, which would be accomplished through the use of the Siloxa-Tek 8500.