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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Concrete settles to harden. This is why heat is generated. The churning stops the settling. Concrete will harden “dry” even when completely submerged in water. The particles fall slowly into locked positions through being wedged among all the other particles.
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