Hydraulic cement was crucial for binding stone structures, such as locks and aqueducts, because it hardened underwater. Unlike traditional lime mortar, this cement ensured long-lasting waterproof connections, preventing leaks and maintaining the canal’s integrity.

TRY THIS

Crush and mix the cement with water—how does it react? Smear it—does it dry into a hardened trace? Observe how it transitions from fluid to solid, just as it once did beneath the canal’s waters.