I'm building my own home and got into a real mess !.. I have my forms for my footings built ( 16" wide x 8" high x 150 Linear feet) Small house. All set to have my local concrete supplier (national chain) deliver the concrete, have the helpers, all set. HOWEVER, I didn't realize that due to the remote area and poor access to the property (very remote), the supplier is un-able to either deliver or "pump" the concrete. We're talking about 6 cubic yards of concrete. My only solution is this: Block off parts of the footing forms, get a mixer (largest I've found so far is 12 cubic feet, yes, feet !.. I'm in need of almost 300 60# bags of concrete). If I use the rebar that was intended, and use what's called a "keyway" meaning puting in a keyway between the sections, can I pour the footings in sections using this method ?, also, what is the time frame between mixing and pouring, meaning can I mix up 12 cubic feet, pour it, then mix up another 12 cubic feet and pour that right on top of the the first pour ?... How much time would I have between pours before my concrete starts setting up ?... Also, since I have to pour my wall ( 8" wide, 18" tall x of course the same 150 linear feet), can I pour the retaining wall the same way ?, Figure 12 cubic feet is almost 1/2 cubic yard, I would need 14 mixings total. If I can get two mixers going at the same time, could I get the compete pour in one day without the concrete "setting up" on me ?.. Still using the method above, meaning block off sections and pouring that way.