Diluting concrete with water to make it workable

[Haaheo okole puka]

Come to think of it, if you're pouring under a house that's up on jacks... you'll need a pumper truck with hose along with the concrete truck. Who's going to drag that hose around and guide the pour? Who's going to vibrate and who's going to work the grade and finish? That's a minimum 3-5 man crew with know-how experience.