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How It Works-CURING

  • Cure concrete - achieve required strength gain sooner
  • Quote projects accurately
  • Keep projects on schedule
  • Keep crews and equipment working all winter
  • Avoid risk and expense of frozen concrete
  • No expensive enclosures to build

Cold temperatures slow speed of
concrete's cure, causing cost
increases and schedule delays.

Best Solution:

Use a Ground Heater® heater to accelerate the cure.

A Ground Heater® raises concrete to ideal curing
temperature (65°-75°F), greatly reducing costs and delays.

Fact #1:
Hydration
Reaction
jim
Cement chemically reacts with water to produce calcium silicate hydrate... the chemical compound that makes concrete hard and strong.

Fact #2:
Temperature
temp
Temperature mainly determines the speed of this hydration reaction.

Fact #3:
Speed
clock
The speed of the hydration reaction determines how long it takes forconcrete to set and develop strength. The speed of the hydration reaction is mostly determined by the temperature of the concrete.

Concrete Curing Process:

Aggregate & Paste
Plastic Phase
Concrete is placed
Cold temperatures delay initial set and increase the risk of concrete freezing.

Temperature vs Time to Initial Set
plastic table

Initial Set

Set Phase

Finishing operations are completed

Cold temperatures delay final set and increase the risk of concrete freezing.
Concrete must reach 500 psi before it can withstand a freezing cycle.

Temperature vs Time to Reach 500 psi
set time

Final Set

Hardened Phase

Curing measures are implemented and strength development begins

Cold temperatures delay strength gain. Concrete must reach 75% design strength to strip forms & withstand load.

Temperature vs Time to Reach 75% Design Strength
harden

  • Cure fast - achieve initial set in 2-6 hours
  • Cure all placements - flexible hose allows any configuration
  • Cure easy - no enclosures to build; set up is simple
  • Cure large areas - up to 24,000 sq. ft./application
  • Cure safe - certified in the U.S. and Canada

Slab on Grade

slab

1. Preheat ground 2. Remove insulation & hoses 3. Place concrete on warm ground 4. Maintains slab at 65°-75°F

Poured walls or Columns

columns

1. Preheat forms, cover with insulation 2. Pour 75° concrete into forms 3. Ground Heater® maintains 65°-75°F concrete for curing period

Elevated Slab

elevated slab

Ground Heater® heating elevated slab Cross-section view Ground Heater® maintains 65°-75°F concrete for curing period