Curing Concrete

1
Curing Concrete
2
Curing
Curing requires adequate

• Moisture
• Temperature
• Time

If any of these factors are neglected, the
desiredproperties will not develop
3
Effect of Adequate Curing on Hardened Concrete

• Increased
• Strength
• Watertightness
• Abrasion resistance
• Freeze-thaw resistance
• Volume stability

4
Effect of Moist Curing
5
Effect of Curing Temperature on Strength
6
Effect of Curing Temperature on Strength
7
Curing Methods

• 1. Supply additional water with
• Ponding or immersion
• Spraying or fogging
• Saturated wet coverings

8
Curing of Concrete by Supplying Water
Evaporation from water surface
Water supplied from external source
Saturated
Concrete
9
Curing Methods

• 2. Seal in mixing water
• Plastic sheets
• Membrane-forming curing compounds

10
Membrane Curing of Concrete
Evaporation from water surface
Curing membrane
Partially saturated
Saturated
Concrete
11
Curing Methods

• 3. Strength gain is accelerated with
• Live steam
• Heating coils
• Electrically heated forms or pads

12
Steam Curing
13
Strength vs. Steam Curing
14
Strength vs. Curing Temperature
15
Sealing Compounds