Why Was Roman Concrete So Durable? Scientists Say It Could Heal Itself

Right; A large-area elemental map of a 2 cm fragment of ancient Roman concrete showing a calcium-rich lime clast (in red), which is responsible for the unique self-healing properties in this ancient material. Left; The archaeological site of Privernum, Italy where the sample was collected. Source: Masic et al./MIT News Office

Materials scientists have been working with archaeologists and historians for many years, attempting to unlock the fascinating secrets of Roman Empire concrete-making technologies and techniques, which allowed the Romans to construct some of the most enduring monuments the world has ever seen.

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