How do i make sure i have the right air in concrete cement if i'm mixing at home.So that the concrete is stronger and won't crack in cold winters. I'm pouring a small walk way about a meter of concrete.
To get air entrained concrete similar to that which you'd get from a ready mix delivery, you'll need to add an air entraining agent to your mix.
Without getting in to serious mix design, for all practical purposes, a 4:2:1 (stone : sand : cement) mix will likely suffice for a walkway.
If you're really bothered about cracking, include a layer of smaller gauge reinforcement (eg A142) as an anti-crack mesh.
My understanding is that air entrained concrete is only possible with ready-mixed concrete.