打印喷嘴在ariz的坦佩，坦佩的一个小剧情周围来回扫过。，一个单独的家庭的墙壁开始形成。两位技术人员留着龙门式3D混凝土打印机，一小群人类志愿者栖息地在需要时俯瞰，但喷嘴刚刚逐层构建家庭层。墙壁打印后，房屋的建设将通过传统手段完成，并且家庭最终将由栖息地选择人类中央亚利桑那州的栖息地选择的家庭。

“通常，栖息地将有20个左右的志愿者，现在我们有几个志愿者帮助我们清晨清理了这个网站，”塞缪尔·赫兹，Peri USA和项目领先的Tempe 3D印刷家。“一旦打印机上升并运行，他们就可以坐在阴凉处，观看印刷。”

The 2,433-sq-ft home is comprised of 70% to 80% 3D-printed concrete, including all interior and exterior walls and portions of the attached garage. It’s the first project in the U.S. to use PERI’s 3D printing system. The BOD2 printer, manufactured by COBOD, is able to move freely along three axes and can travel at up to 1 m per second.

所使用的混凝土是来自Laticreete的专门设计的3D印刷组合，但Hager表示打印机可以使用一系列混凝土类型，只要总尺寸低于8毫米即可。“对于坦皮项目，基础板坯的压缩比我们印刷的压缩越大，”他说。“墙壁非常强壮，具有强大的垂直压缩负荷力量，它们将处理风量载。”没有具体的建筑代码解决了3D印刷的混凝土建筑，但Peri与坦佩市和亚利桑那州的州众所周知的众所周知。家庭确实有几个非3D打印列来支持屋顶，以满足现有的代码语言。但Peri已经在德国建造了几座3D印刷建筑，其中静载荷完全由3D印刷的混凝土墙进行。

The design of the three-bedroom home is based on a typical one-story, ranch-style home common in Arizona, but Hager says the freedom of movement of the printer and structural properties of 3D-printed concrete allow for all sorts of previously difficult or expensive design features. “This house will not look too different from one down the block, but in the future, architects can play around with the design a bit.” The 3D-printed concrete can handle overhangs and can easily be programmed to print out curved, tilted or complexly textured walls that normally would require a lot of custom formwork to cast on site.

For this home, the wall-print design does include channels for conduit and spaces for electrical outlets. The kitchen’s counters and island were also 3D printed, just a sample of how detailed the preprogrammed design can get, Hager says.

Operating the printer also is meant to be accessible to workers. With one technician to monitor extrusion rates on a laptop or tablet and another to make sure the concrete is mixing properly, labor requirements are minimal compared to typical stick-built construction. And new workers can be trained to run the printer in a matter of days, Hager adds.

The speed and competitive cost of the 3D-printed home could be a big deal for Habitat for Humanity, according to Jason Barlow, CEO of Habitat Central Arizona. “If we can deliver decent, affordable, more energy-efficient homes at less cost, in less time and with less waste, we think that could be a real game-changer. Just think of the implications,” he says.