3D Mud House Printing
"The Italian 3D printing company WASP may have solved this problem by developing an easily-transportable machine that can quickly create dwellings out of mud and natural fibers—materials already available where the houses will be built.
Making houses out of mud is not anything new. In fact, humans have been constructing with mud and fiber binders for over 9,000 years. However, this new technique offers some extreme advantages. Extruding the mud in this manner drastically increases the amount of surface area, making it habitable much sooner than waiting for thick bricks to dry before construction can begin. Additionally, the triangular shapes between the walls make it stronger and capable of bearing more weight than traditional methods, all while using less material. It can make homes that are 10 feet (3 meters) tall, creating a spacious home." (http://www.iflscience.com/technology/3d-printer-uses-mud-natural-fibers-make-homes-impoverished-areas)