RECOMMENDED DOSAGE RATE
Dry Mixes: Recommended Dosage is 0.1% to 0.5% by weight of the cement for dry-blended materials. Since many factors may affect air entrained and entrapped in concrete, extensive testing with your specific materials is recommended to determine the optimum dosage rate. Contact Fritz-Pak for technical assistance with your dry mix designs. Ready-Mix Concrete: Mix Design: Use one bag of 1.1 lbs (500 g) for every 1-4 yards (1-3 cubic meters) of concrete to reduce 1-2% air entrained. For best results, add Air-Minus at the beginning of the load cycle to prevent air from being entrained during mixing.
Due to the high variability of causes of air entrained and entrapped in concrete, extensive testing is recommended to determine the best
mix design for your specific materials. Job Site Corrections: If corrections need to be made on the job site because air content is too high, begin by adding two 1.1-lb (500 g) bags of Air-Minus per truckload. Recheck air content. If any change can be measured, continue to add Air-Minus until air content is in the desired range. If no change is measured after the first or second addition, Air-Minus may not be able to correct the problem.
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.