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Admixture?

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kdlklm

So far I have not been using any additives in my mix, but some issues have come up with freeze/thaw. So I was starting to look at using some air-entraining admixture. A lot of the manufacturers don't seem to have an exact mix ratio for adding it. I don't have a machine to test the air in the concrete either. So I was wondering what other people are using.

I didn't seem to find much information about using air additives to zero slump concrete for curbing.