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When it comes to designing high-density concrete mixes, air content is always top of mind. If the mix contains too many air pockets, it won’t function as well as it needs to. This could be very problematic as these types of mixes are often used to create barriers in radiation areas of hospitals, or walls around nuclear power plants. For these mixes, the lower the air, the better the concrete. Unfortunately, keeping air low can be a challenge. Temperature, mixing time, and even certain admixtures can all cause fluctuations in the air content. That’s why Fritz-Pak developed our air-detraining admixture, Air Minus. This product is easily added to your truck at the job site, so you can be sure the mix you deliver has the air it needs – or doesn’t need.

Using an Air-Detraining Admixture

In Fritz-Pak’s Air Minus, the chemical structure of the air-detraining admixture lowers the water tension in the mix. This prevents the formation of bubbles and releases air already trapped in the mix. When using this admixture, patience is very important. Air Minus takes time to work its way through the mix, which is why once you have mixed it into the truck, you need to let the load rest for at least five minutes before performing an air test.

Benefits of Air Minus

Air Minus comes packaged in our signature water-soluble bags for easy addition to your truck. This powerful air-detraining admixture increases the unit weight of concrete while improving the compressive strength. Plus, it can be used to maintain the densities of grouts and slurries as well as keep fly-ash from entraining too much air in the mix. Finally, adding Air Minus to your concrete reduces the entrained air caused by the modern chemistry in superplasticizers.

Learn More

For additional information or technical support regarding our air-detraining admixture, give us a call at (214) 221-9494. Don’t forget to follow our social media pages for more information about how our products can improve your concrete.

959961.1 lb. (500 g.) water soluble bag2442
9599750 lb. (22.7 kg.) paper bag40
What is the mode of action of Air-Minus?
Air-Minus reduces the water tension thus reducing the ability of water to form bubbles.
What happens to the air after I add Air-Minus?
As concrete is exposed to the air, the entrained bubbles break and the air is released back to the atmosphere. That is why it is important to mix the concrete after Air-Minus has been added.
What is the main component of Air-Minus?
It is a medium chain, branched glycol.
Is Air-Minus soluble in water?
Will Air-Minus effect the strength of the concrete?
No. It may increase compressive strength.
When is the best time to add Air-Minus?
Prior to mixing. This can prevent the formation of bubbles thus reducing entrained air.
Can you knock out all air content with Air-Minus?
No. The lowest air content you can realistically expect is around 1.0%.
Can loads containing Air-Minus be redosed?
Yes. However, the air content may or may not decrease further.
Can Air-Minus counteract high dosages of air entraining admixtures?
No. Air entraining admixtures are very strong materials. If concrete is accidentally dosed with high doses of air entrainers, Air-Minus may not effectively lower the air content.
Can Air-Minus be used with latex and other polymers?
Can Air-Minus be used to produce heavyweight concrete, such as for radiation shielding?
Yes. It helps to maintain stable air contents and may be more effective than adding heavy weight aggregates or minerals.
Can Air-Minus be used in cement slurries and low viscosity grouts?
Yes. Air-Minus is very effective in those products.
Can Air-Minus be used to counteract the air entraining effects of polycarboxylate superplasticizers or high dosages of conventional superplasticizers?
  • Reduces the amount of concrete rejected due to high entrained air content
  • Increases unit weight of concrete
  • Recommended for the production of heavyweight concrete
  • Allows high speed mixing of cement and fly ash without foaming
  • May increase compressive strength of concrete
  • Counteracts entrained air caused by the new generation of superplasticizers
  • Maintains slurry densities
  • Air-Minus is available in bulk or in a patented water-soluble Fritz-Pak inner bag for convenient use at the plant or job site


Air-Minus is compatible with most admixtures. Adding salt, surfactants, superplasticizers, air entrainers or latex to the mix can cause increased foaming or reduce the effectiveness of Air-Minus. When used with other admixtures, each admixture must be dispensed separately into the mix.