TEMPERATURE: If ambient temperature drops below 5 degrees C within 24 hours, concrete must be protected for the first 3 days with insulating material, such as insulated blankets or straw. Tarps should be removed during the day, and re-applied at night. Additionally, concrete must be allowed to air-dry for approximately 30 days before winter.
Protection from moisture loss: Concrete Hardening requires that moisture be present for cement hydration.
Curing methods include:
1) curing compounds
2) continuous water spray
3) covering with wet burlap
5) covering with plastic sheets
When placing concrete after September 15, the use of curing compounds is not recommended. Proper cold-weather curing procedures should be followed. A high-quality sealer should be applied in the spring. Your driveway should be kept clear of ice, snow and freezable materials.
Placement of concrete pavements after September 30th is not recommended unless proper Cold Weather Concrete procedures are followed. CSA A23.1 recommends: Concrete subject to freeze-thaw and de-icing chemicals should be cured for a minimum period of 7 days at 10 degree C , or the time required to attain 70% of specified 28 day concrete design strength.
CAUTION: The use of DE-ICING CHEMICALS AND SOME FERTILIZERS may be harmful to your concrete surface.
MAINTAINING YOUR CONCRETE SURFACE
To maintain a quality and durable concrete surface for many years, the following is highly recommended:
Concrete must be re-sealed with a high quality sealer as per manufacturer's directions.The driveway, sidewalk, or garage pad should be kept clear of ice, snow and freezable materials in winter.
CONCRETE ALBERTA RECOMMENDS THAT CONCRETE BE PLACED AND FINISHED BY A CERTIFIED JOURNEYMAN FINISHER.