I'm helping my Dad design his new house. Fairly small, around 1000sf. I really like the idea of ICFs, and plan to use it for my own house. However, I'm not sure if it could work for my Dad because his house is sited in the woods and the driveway stops 250 ft from the house, he walks in.

Is it possible to do ICFs without being able to get a concrete truck to the site? Could we mix it ourselves quick enough with a rental machine?

 Yes you can.

 I have seen a one man project that was done 4 feet at a time.

 He did not even use bracing , if you run your bar pass 40 times the diameter and use a key way it will work.

 Now its easer to have it pumped and mix for you , but small wall pours say 30 feet at 4 feet high will work.
 Don't think that it will be easy, I know you will be working harder than most people would want to.
 2 mixers or more running full time will put out more than what I would like to keep up with a shovel or a 5 gal. bucket.
 I have done a lot of flat work like this and you can't stop until it's all  filled and it is hard to keep working it with no breaks! 

  Good luck with it!

You can line pump it...it's a fair bit of work, but easier then mixing bags and placing.

If you go with the line pump you will need a lot of guys to move the hose around and hold it while doing the wall

Also get a small pad or walkway ready to pour when you do the walls, you're going to have a fair bit of mud in that hose and need to put it somewhere

Could you explain this a bit more?

Do you mean rebar spaced 40 times the diameter apart?

I can hussle all day if I need to, I'm used to it.

Thanks for the info.

40 times the diameter is the code for overlap of the rebar. Hence #4 rebar (4/8=1/2 inch) Both contact and non contact lap joints need to be overlapped 40 times the diameyter of the bar size.
Like Chris said a line pumper would be the only way if the truck can't get close. Then it takes extra people to man handle the 3 inch grout line. Mixing it and placing the concrete by hand will not give you the end result you want, regarless if the rebar is there. It's going to be there regardless, hence the name reinforced concrete.

Are you excavating by hand with a chainsaw root axe and shovel? How will you get other building materials, appliances, furnishings to the house? Is there a path of any kind? Carrying everything in is going to get mighty old. I'd go for extending the drive first - even if it's only dirt and will go back to natural when you are done.

My Dad's an old hippie. There's no way we're putting in a driveway that can support a concrete truck, even temporarily. I'll be lucky to get a small excavator back in there. There's a jeep trail that gets to about within 100ft or less of where the house will be, we can use that for materials etc then carry them from there.

You can always get a line pump as close as possible and then carry the concrete from the road to the pump with a Georgia buggy or a bobcat bucket. It might be a little slower, but it's an option.

Greg

If you can get an excavator in there to dig it then you can certainly use a bobcat with FEL to move the crete from the truck to the wall.

So my wife and I are building our own ICF block house ourselves and the concrete mortar has gone up so much.. we are wanting to mix the concrete mortar ourselves.. can anyone tell us what the mix is for ICF DIY.. I know it will take longer for us to do it this way but we are not in any real big hurry.. thank you for any help you can give us