Question

subraya los verbos Roman structures have lasted thousands of years ago. Compared with the

concrete of today, Roman concrete is extremely durable. Scientists at the University

of California, Berkeley, in the U.S., found that Roman concrete had a remarkable

ingredient—volcanic ash. This leads to the formation of an extremely stable

compound called calcium-aluminum-silicate-hydrate. Not only that, manufacturing

Roman concrete would create a lot less carbon dioxide than modern methods of

concrete production. But it does take longer to dry and is weaker than modern​

Answer 1

Respuesta:

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