How long does concrete take to cure? (for a thick slab)
Short answer
longer to walk
Thicker pours hold water and set slower at depth.
What changes the time
| Condition | Time | Why |
|---|---|---|
| in cold weather | much longer | Below 10C hydration nearly stops; protect with blankets. |
| for a thick slab | longer to walk | Thicker pours hold water and set slower at depth. |
Tips
- Keep concrete damp for the first 7 days — drying too fast weakens it.
FAQ
Can I walk on concrete after 24 hours?
Usually yes for foot traffic, but avoid heavy loads for at least a week.