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Old 03-11-2019, 07:26 PM
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Ironman Ironman is offline
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Tim, concrete hardens under water as well. When you mix water and cement yopu have an initial setting time, when it is fluid. Then it starts the process of hardening. The hardening process is a crystal growth off of a particle of aggregate. If you can look under a microscope at concrete that has started to set and someone threw in a bit of water and mixed it up again, you would see thousands of broken off crystals of calcium carbonate. That is why they say do not remix conc, as there is limited material in the mix to grow crystals, and this requires water to do so.
In three months 90% of the hardening is completed and the final hardening is complete by the thirteenth year.

Just don't get the truck stuck before it has unloaded.
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