NCA (Non-Chloride Accelerator)

  • Overview
  • Packaging
  • FAQs
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Fritz-Pak NCA is a non chloride accelerator in powdered form. It is packaged in water-soluble bags for easy addition to concrete ready mix trucks. It shortens set times while increasing early compressive strength. This product does not contain calcium chloride or any other materials that promote corrosion in steel or efflorescence in concrete and is a non-hazardous admixture. No special handling, storage, or transportation expense is required.

984505 lb. (2.27-kg.) water soluble bag836
9845050 lb. paper bag42
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?
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


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