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1. 

   Nabuquduriuzhur said, 10 months ago

   Must be crudcrete. (The common concrete of today where the forms are taken off as soon as it’s solid enough to hold itself up and it never cures because it then allowed do dry out.)
2. 

   QuiteDragon said, 10 months ago

   @Nabuquduriuzhur

   “Must be crudcrete.”
   Nah, it’s Unity.
3. 

   DavidGBA said, 10 months ago

   Concrete is like epoxy, it does not dry, it cures (giving off much heat) with time, as long as the temps is moderate, Getting rid of the heat can take embecded water pipes. Check out building the Black River Canyon (Boulder) Dam. They built a refrigeration plant. Still curing, so I hear.
4. 

   DavidGBA said, 10 months ago

   http://en.wikipedia.org/wiki/Concrete#Curing
5. 

   Night-Gaunt49 said, 10 months ago

   I worked in concrete and it was fascinating seeing it turn a green and start giving off heat as the chemical reaction took place.
6. 

   Nabuquduriuzhur said, 10 months ago

   Back before infrastructure was all but abandoned in the mid 1990s, I worked for the Corps of Engineers, NPD Lab near Portland. Every year we would break a test cylinder from Bonneville (poured in 1937). They were still gaining strength.
   .
   The last major public works project in the U.S. was the American River Dam System. Cold Creek, N Fork Am river, etc. Those were roller-compacted concrete. It would be interesting to see if that lean-mix concrete is still gaining strength. RCC was weird stuff. It had enough cement to hold together, but little more. The dams were capped with 6’ of good concrete. All of Bonneville and Grand Coulee are good concrete, unlike the more modern dams, so they are unlikely to move in a quake.
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