3-D printing may soon expand beyond the small scale. In 2010, the world's largest 3-D printer will build the Radiolaria Pavilion, a 10-meter-tall structure in Pontedera, Italy. Made out of sandstone, the building will be printed one 5-10mm layered sheet at a time.
The thin layers of the structure are held together by an inorganic binder, not the normal steel reinforcements that most buildings have. This allows for strength and design freedom not available before. The structure was designed using CAD/CAM software and then exported directly to the printer. Once printed, it only takes about 24 hours for the material to fully set.
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