BeginnerTopic 12 of 112Civil & Structural
Curing of concrete
Keeping concrete moist develops strength and reduces cracking.
In depth
Curing keeps concrete moist and warm so cement hydration continues, giving full strength and durability. Methods: ponding, wet burlap, sprays, membranes, plastic sheets. Minimum 7 days for OPC (10 with blended cement). Inadequate curing causes cracks and dusting.
Key points
- Strength gain over 28 days
- Hot and cold weather precautions
- Steam curing for precast
ExampleA slab left uncured in the sun may lose 30% of its strength.
What is Curing of concrete?
Keeping concrete moist develops strength and reduces cracking.
Why is it important to understand curing of concrete?
Curing keeps concrete moist long enough for hydration to continue, which determines the final strength and surface quality.
Why does curing matter?
Hydration needs water to continue, and early drying stops strength gain and causes surface cracking and dusting.
How long should concrete be cured?
Commonly at least seven days for ordinary cement, and longer in cold weather or for durable mixes.
How is Curing of concrete used in practice?
Typical applications include covering a new slab with wet hessian for seven days, applying a membrane curing compound on a large pavement and protecting a hot-weather pour from fast drying and cracking.
What should I learn before Curing of concrete?
Study "Workability and slump test" first (topic 11 of 112 in Civil & Structural). It covers the groundwork this topic builds on.
What are the key points of Curing of concrete?
Strength gain over 28 days. Hot and cold weather precautions. Steam curing for precast.
Can you give an example of Curing of concrete?
A slab left uncured in the sun may lose 30% of its strength.
What comes after Curing of concrete?
The next topic is "Compressive strength testing", which builds directly on this one.
How difficult is Curing of concrete?
It is classed as Beginner in Civil & Structural (topic 12 of 112). It is an entry-level topic. It relies only on basic school mathematics and the ideas introduced earlier in this discipline.