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NCA (Non-Chloride Accelerator)

  • Overview
  • Packaging
  • FAQs
  • Advantages
  • Resources

When concrete is placed in cold weather, the mix sets up slower than normal. This increases the risk the water will freeze before the batch fully hardens. Frozen concrete does not set up correctly, and will likely need replacement in the future. Fortunately, adding a concrete accelerator to the mix increases the speed of the set time, reducing the amount of time the water in the mix is vulnerable to freezing. Fritz-Pak’s Non-Chloride Accelerator offers increased set time in a convenient water-soluble bag. One bag of NCA can speed up the set time by up to one hour.

Why Use a Non-Chloride Concrete Accelerator?

Using a chloride based concrete accelerator increases the risk of steel corrosion and efflorescence in concrete. Fritz-Pak’s NCA offers the same benefits without the added risk. Check out the videos below to learn more.

Item# Description Bags/Case Cases/Pallet
984505 lb. (2.27-kg.) water soluble bag8 6
9845050 lb. paper bag1 40
What states have approved NCA through the Department of Transporation?
Arizona, Colorado, Florida, Idaho, Indiana, Iowa, Kansas, Louisiana, Maine, Massachusetts, Mississippi, Missouri, Montana, New Mexico, Ohio, Oklahoma, South Carolina, Tennessee, Vermont, Virginia, West Virginia, & Wyoming
What other effects will this product have on my concrete?
You may notice a slight increase in slump, since the product has some water reducing properties as well.
Can I use less than one bag per yard?
Yes, you just need to experiment to get the right dosage for your particular needs.
Can I use more than three bags per yard?
There's no point. More than 3 bags per yard will not give any faster acceleration.
Will it change the final strength of my concrete?
No.
Will NCA promote the corrosion of steel in concrete?
No, unlike the commonly-used calcium chloride, Fritz-Pak NCA will not promote corrosion or efflorescence.
When I use powdered calcium chloride I notice that the water or the calcium chloride gets hot, but it does not happen with NCA. Why?
The heat released by calcium chloride when it dissolves solution is called heat of solution and is not related to the concrete setting up faster. The heat of solution of NCA is much less than the heat of solution of calcium chloride. That is why it is also a safer product.
Will Fritz-Pak NCA have any affect on colored concrete?
No. NCA will not cause colors to segregate, the way calcium chloride tends to do in concrete containing integral color.
  • Speeds up concrete set-time
  • Provides higher early strength
  • NCA does not promote steel corrosion
  • Dosage can be increased for faster acceleration
  • NCA can be easily stored for use as needed
  • The material does not require heated warehousing
  • Can be used in all weather
  • Acceleration is dependent on the dosage used
  • The need for protection and heating of concrete in cold climates is reduced or eliminated
  • Allows faster reuse and stripping of forms
  • Suitable for all types of concrete
  • NCA is packaged in a patented water-soluble Fritz-Pak inner bag for convenient use at the plant or job site

Compatibility

Fritz-Pak NCA is compatible with most concrete admixtures. When used with other admixtures, each one should be dispensed separately into the mix. Effectiveness of NCA is dependent on the proportion of C3A to SO3 in the cement. Higher acceleration will be obtained in cements with ratios greater than 4.0. In general, higher accelerations will be obtained in mixes with Type I, III or white cement.

Applicable Standards

This product meets the following specifications:

  • ASTM C-494 Type C
  • ASTM C-494 Type E
  • AASHTO M-194-94