Common rebar is made of unfinished tempered steel, making it susceptible to rusting. Normally the concrete cover is able to provide a pH value higher than 12 avoiding the corrosion reaction. Too little concrete cover can compromise this guard through carbonation from the surface, and salt penetration.
Quick Answer. Maglev trains can reach speeds of up to 361 mph. This was the fastest speed reached by the MLX01, which was measured on December 2, 2003. Executed on the Yamanashi maglev test line in Japan, the test run was administered by the Central Japan Railway Company and the Railway Technical Research Institute. Keep Learning.
How much does it cost, and how long does it take, to construct a maglev train line in a city? Such as the one in Shanghai that goes to and from the airport.f that number is accurate, it would make the maglev roughly similar in cost to an underground urban metro line. I think construction times would also be similar-in either case the tunneling or construction of elevated tracks would take the most time.