Fritz-Pak Air-Minus is a dry powdered air-detraining admixture formulated to reduce the amount of air entrained in concrete and cement-based materials. It is recommended for high strength grouts, high-density concrete, and high strength concrete and can also be used in small precast concrete pieces or statuary. Air-Minus is can also be used to counteract the air entrainment caused by water reducers and plasticizers. For high-density or high-strength concrete, it is best used when added at the plant but it can also be added at the job site if used with precision to reduce over-entrained concrete.
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?