Dakota,

I think it is probably in the same vein as rammed earth, but the portland cement powder helps to hold things together. Once the portland has set, then water won't affect it.

I'll bet rammed earth has to be done in areas with soil of the right consistency to hold together and good drainage for the stuff to be able to survive...kinda like the idea of adobe being used in an area that has lots of rain....nope, doesn't work. But in the right areas, it works like a champ.

My wife grew up in extreme poverty...she has experienced dirt floor kitchens...says they work ok in the right conditions, where they packed rock hard.



Jon.