🇺🇸 Virginia, America Woman Driving:- “Oh My God - this is disgusting, what the……” Imagine driving down the same road you’ve driven down for the last 40 years and thinking, these have probably always been there, I just never noticed it……
Roman concrete was remarkable because it could last for thousands of years, even underwater. Its mixture of lime, volcanic ash, and water allowed it to develop cracks that didn’t weaken it. When water entered a crack, it reacted with the lime to form calcium carbonate, which gradually filled the crack and bonded the concrete back together, essentially giving it a natural self-healing ability.
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