Currently, it still takes a couple of weeks to print a house, but WASP’s 3D mud printer has some advantages: it can be quickly deployed and used in remote rural areas; it uses an abundant and hyper-local material and it can be easily assembled with two people in two hours with the help of ratcheting straps. The printer could also be a way for local builders to express native styles of building. WASP offers 3D printers for ceramic too, and there are plans to build a full-sized house in Sardinia this year, using locally available wool as the fibre binder.
http://www.treehugger.com/green-architecture/wasp-3D-printer-affordable-mud-homes.html