
The Concrete That Heals Its Own Cracks: How Self‑Repairing Buildings Are Ending the Age of Crumbling Infrastructure
The crack appears overnight. It is thin—barely a millimeter wide—the result of a freeze‑thaw cycle that stressed a concrete bridge support beyond its elastic limit. In a conventional structure, that tiny fissure would be the beginning of the end. Water would seep in, freeze again, widen the crack. Chlorides would reach the rebar, triggering rust. The rust would expand, spalling the concrete. Within a decade, the bridge would need expensive repairs or replacement. But this is not a conventional bridge. This is a pilot section of the A59 highway near Delft, and the concrete is alive.







