Defoamer – Fritz-Pak Air-Minus

$10.34

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This is a dry powdered defoamer/air detrainer that decreases foaming and minimizes air entrainment in concrete mixes. We recommend the use of defoamer with a liquid polymer such as Forton in GFRC, to increase the density and therefore strength of the concrete and improve the surface quality.

Defoamer should be pre-blended into dry ingredients before mixing. Defoamer does not cause air to disappear, it prevents the formation of a stable foam around air.

Use 0.1% to 1.0% by weight of cementitious material. You will need to experiment with your mix to determine the optimum dosage. Try starting with 0.5%, the recommended dose for the CCI GFRC mix.

 

This is a dry powdered defoamer/air detrainer that decreases foaming and minimizes air entrainment in concrete mixes. We recommend the use of defoamer with a liquid polymer such as Forton in GFRC. Minimizing air increases the density and therefore strength of the concrete and improves the surface quality. (Note that the dry polymer blend we sell already has defoamer in it.)

Commercial GFRC production does not require the use of defoamers, because high energy sprayers are used for both mist and backer coats, and the energy of spraying purges air. In contrast, when hand placing backer, entrapped air is not purged. (Compaction rollers serve to align fibers, and are not very effective at removing air bubbles.) For this reason, the use of defoamer is an important step in artisan GFRC making.

Defoamer should be pre-blended into dry ingredients before mixing. Defoamer does not cause air to disappear, it prevents the formation of a stable foam around air.

Use 0.1% to 1.0% by weight of cementitious material. You will need to experiment with your mix to determine the optimum dosage. Try starting with 0.5%, the recommended dose for the CCI GFRC mix.