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Location DB > Japan > Iwate Prefecture > Kamikita > Kamikita Mine > July 2008. > R3a-003 (3).JPG

5 / 11   R3a-003 (3).JPG

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Concrete spalling is severe due to freezing water in winter, with great lumps coming away under freezing conditions.
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Posted by Samurai 10/27/2008 3:52 PM | remove
  as an observation, when rebar is exposed to atmosphere as it is in these photos, it begins to rust at an accelerated rate and will actually displace the concrete, further weakening the structure... thank you discovery channel.

Posted by Kuroneko 10/28/2008 1:09 PM | remove
  Yah... but even worse is the spalling from the expanding reo -inside- the concrete when water finds its way in and tracks the fissures. This is where the most damage starts... Thank you Channel Pedant.
Posted by Samurai 10/28/2008 3:27 PM | remove
  we see the damage in the older sections of concrete highway left here in the northeast.

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