I see cement trucks constantly turning the cement, I get that it may just be keeping it thoroughly mixed so no one part becomes more dried than the rest. Is that all that’s happening here?
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I believe the churning keeps mixing the evaporated water back into the cement. After it’s poured, the water evaporates out and is lost which makes it harden. But in a closed system, hardening is inhibited because the evaporated water is constantly being mixed back into the cement. You can also carry a water tank to keep injecting more water into the cement if the container is not completely air-tight.
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