Thanks to their self-healing concrete.
. Scientists in the past have discovered that ancient Romans used to add volcanic ash to their construction material.
However, according to the researchers, the pozzolanic material isn’t the only thing contributing to the long-lasting nature of ancient. The concrete also featured unusual white chunks that many previous researchers considered as marks that may have been left due to poor mixing of concrete. The current study reveals that those white chunks represent “lime clast,” a special material composed of calcium oxide . It is highly reactive and dry, and it was mixed with other materials at probably very high temperatures.
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