The primary reason behind the many Greek
structures such as the Flavian Amphitheatre obtaining such durable and
sustainably success would be the invention of concrete. At this time Romans
used two types of concrete mortar, one simply containing limestone, clay and
rubble. While the other, “pozzolana” consisting of an aluminous material that reacts
with calcium hydroxide with the presence of water to create cement, this would
prove to be the superior mortar. This volcanic ash made the concrete so dense
that it could prevent water moisture when the bricks during freeze and thaw
cycles to preserve the structure. In the recreation diagram I’ve created, on
the right hand side there is a map key distinguishing the different variations
of concrete mortar used on the missing wing of the monument if it was still in
existence today. The diagram also depicts each type of brick used in each Greek
order embedded on the exterior façade of the amphitheater.
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