Concrete and nails (20 photos)

It's hard to imagine, but during the Second World War, due to the lack of metal ships were built of concrete!

From this cheap, readily available, corrosion-resistant material at one time created boats, yachts, ships, and even entire fleet. During the 2nd World War, the US had only 24 ships and 80 barges of concrete. Concrete ships participated in combat operations, transporting troops, cargo, and they are not even an ocean was terrible typhoon. Positive experience has given pause domestic shipbuilders about creating a concrete submarine











































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