Diluting concrete with water to make it workable

[Haaheo okole puka]

For every percent of air within the mixture there is a 3%-5% reduction in the compression value of the concrete.
Concrete averages 20% air by volume without vibration/consolidation. This means a 2k mix can lose between 60% and 100% of its compression value rendering a 0k - .8k mix without vibration/consolidation.

I initially screwed up that math it's far worse than what I originally wrote... I knew it was a big no-no not to vibrate but not even I realized it was potentially that bad. Vibration/consolidation is a must, no and's if's or but's about it.