Saw an article or documentary and it said something to the effect of Roman buildings heal themselves after being damaged or weather damage.
How can that be
In: Engineering
When you make concrete, you have to make sure it ALL gets wet, or you’ll have pockets of dry powdery stuff in your concrete.
They weren’t able to mix it as well as we can, but when it cracked, this would expose the powdery stuff, then it would get wet and turn into proper concrete.
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