Concrete Curing
CSI Division 03, Concrete
The process of keeping freshly poured concrete at the right moisture and temperature for a period after placement so it can fully hydrate and reach its designed strength, not the same as "drying," since concrete that dries out too fast before it fully hydrates can end up significantly weaker than designed.
Why it matters
Concrete strength develops over weeks, not hours, and inadequate curing (too little moisture, too much heat or cold too soon) can permanently reduce the concrete's final strength even though it looks fully hardened on the surface, a defect that isn't visible until the concrete is tested or, worse, until it fails to perform under load.
On a real project
On a hot, windy day, a concrete crew covers a freshly poured slab with wet burlap and plastic sheeting to slow moisture loss, rather than letting the surface dry out and crack before the concrete has had time to properly cure.
Who this matters most to
A Concrete Worker manages curing conditions immediately after a pour, since the first few days determine much of the concrete's final strength. A Quality Control Manager oversees concrete strength testing, breaking test cylinders taken during the pour, to confirm the cured concrete actually meets its specified strength.
Where this goes wrong
A crew pours concrete in cold weather without protecting it from freezing during the critical early curing period. The water inside the fresh concrete freezes before it can hydrate properly, permanently damaging the concrete's internal structure in a way that isn't obvious until strength tests come back low weeks later.