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.
Martin checks out the speedy train. The fastest train in the world has set a new world record of 375mph. The train can be found in Japan and uses magnetic levitation-or maglev for short-to make it go.But it will be a while before ordinary passengers will get a chance to try out the super fast train.artin checks out the speedy train. The fastest train in the world has set a new world record of 375mph. The train can be found in Japan and uses magnetic levitation-or maglev for short-to make it go.