3D printer can build a house in 24 hours

An amazing 3D concrete printer can knock out a 2,500-square-foot home in a single day ContourCrafting640 The University of Southern California is testing a giant 3D printer that could be used to build a whole house in under 24 hours. Professor Behrokh Khoshnevis has designed a system of building that replaces construction workers with a machine that can quickly build a concrete home based on a computer pattern. Using this method, the professor has created walls that are six feet high, with layers that are 6 inches high and 4 inches thick, and he believes that it can be expanded to whole buildings, saying that, with Contour Crafting, it’s possible to construct the entire structure of a 2,000 square foot house (floors, walls, and roof) in less than twenty hours. It is “basically scaling up 3D printing to the scale of building,” says Khoshnevis. Contour Crafting could slash the cost of home-owning,  and could also be used to create  for people currently living in desperate conditions. “At the dawn of the 21st century [slums] are the condition of shelter for nearly one billion people in our world,” says Khoshnevis, “These buildings are breeding grounds for disease a problem of conventional construction which is slow, labour intensive and inefficient.”

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