He recommended the walls ... lime and porous fragments of glass and crystals from volcanic eruptions (known as volcanic tephra). Admir Masic, an environmental engineer at MIT, has studied ancient ...

There is a rich body of scientific research investigating the secrets behind the remarkable durability of ancient Roman concrete ... "was a mortar roof, lime-washed and very strong, as it is ...

The research, published this week in the journal American Mineralogist, details how ancient Roman sea walls built roughly ... but the Roman recipe of volcanic ash, lime, seawater and a mineral ...

Archaeologists working in southern Italy have identified a Roman fortification built to contain ... A small section of the ancient wall was already known to locals, but there had been no ...