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William Hernandez——Works at Google, Lives in Mountain View, CA
They found that the Romans made concrete by mixing lime and volcanic rock to form a mortar. To build underwater structures, this mortar and volcanic tuff were packed into wooden forms. ... In addition to being more durable than Portland cement, argue, Roman concrete also appears to be more sustainable to produce.Jun 21, 2013read more >>+119962023-06-11 06:38:09
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