Curing The process of maintaining proper moisture and temperature conditions in freshly poured concrete to ensure it reaches its maximum design strength.
Curing is the most overlooked step in sidewalk construction, but it is vital for durability. If wet concrete dries out too quickly under the sun, it will lose up to 50% of its potential strength and develop spiderweb cracks. NYC contractors use chemical curing compounds or wet burlap to keep moisture locked inside the concrete for the critical first few days.
Frequently Asked Questions About Curing
What is curing?
Maintaining proper moisture and temperature in freshly placed concrete so it develops its intended strength and durability.
What happens if concrete dries too fast?
It can lose a large share of its potential strength and develop surface crazing, dusting and shrinkage cracks.
How is concrete cured on a sidewalk job?
With chemical curing compounds, or by keeping the surface damp with wet burlap or coverings for the first several days.
How long does curing take?
The critical period is the first several days, with design strength typically referenced at 28 days.
Does cold weather affect curing?
Yes. Low temperatures slow strength gain, and freezing before the concrete has developed strength can permanently damage it, so protection is required.