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[Ecom] Smart concrete: Iran makes some of the world’s toughest concrete. It can cope with earthquakes and, perhaps, bunker-busting bombs - Page 5

post #41 of 42
Quote:
Originally Posted by lan cable garrotte string View Post

That's why they put thick, deep cuts into the concrete (usually where lines are marked) to compensate for expansion and to assist in demolition and replacement.

That helps a lot, but it still wont stop fatigue failure from thermal cyclic loading if the material is brittle, also it leads to problems when this happens:
Quote:
Originally Posted by dontpwnmebro View Post

did it snow a lot on that roadway?

Possibly, it is in the UK so freeze / thaw would be minimal compared to other countries, but it does happen.
Quote:
Originally Posted by PappaSmurfsHarem View Post

Ehh I don't know, Where I live they made a short stretch of highway (links two other highways together) out of concrete probably 10-15 years ago and they have had minimal work done on it except where there are overpasses. Where as the main highways made of asphalt are repaved nearly every two years.

Fair enough, like I said the one in the UK was a while ago, the materials have probably got a lot better since then. What is it like to drive on compared to asphalt in terms of noise / ride comfort?
Edited by GingerJohn - 3/5/12 at 4:19pm
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post #42 of 42
Quote:
Originally Posted by GingerJohn View Post

Fair enough, like I said the one in the UK was a while ago, the material's have probably got a lot better since then. What is it like to drive on compared to asphalt in terms of noise / ride comfort?

I would say it is noticeably more smooth for a longer time.

You can't beat fresh asphalt, but after roughly a year of heavy traffic it starts to become noticeably more loud and "rough" not bumpy but a slight vibration, where as the concrete stretches of road stay consistent. Of course these are highways at 55+ MPH so it would probably be negligible at lower speeds.
     
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Overclock.net › Forums › Industry News › Technology and Science News › [Ecom] Smart concrete: Iran makes some of the world’s toughest concrete. It can cope with earthquakes and, perhaps, bunker-busting bombs