We worked with the original 3-D printers and I am overjoyed to see the creative use today. Now, if the building materials could be environmentally friendly and green. existing concrete tech is not; polymers are not! Ruth On Wed, Sep 29, 2021 at 11:38 AM Anita D. McClellan <adm@anitamcclellan.com> wrote:

"In a tiny village on the outskirts of Nacajuca, Mexico, builders are creating 200 new houses using an oversize 3-D printer. To build the houses, the printer pours layers of lavacrete, a proprietary concrete mix, one after another in long swirls. One house can be completed in less than 24 hours. The houses can tolerate extreme weather conditions and have already withstood a magnitude 7.4 earthquake. Nacajuca sits in a seismic zone…

“...a typical house on the outskirts of Nacajuca, Mexico: a sleek, 500-square-foot building with two bedrooms, a finished kitchen and bath, and indoor plumbing. What’s most unusual about the home is that it was made with an 11-foot-tall 3D printer…

"The construction firm SQ4D <https://www.sq4d.com/> listed a 2021 3-D printed house in Riverhead, N.Y., for $299,000...In March 2021, Palari Homes <https://www.palari.com/> and the construction company Mighty Buildings <https://mightybuildings.com/> announced a $15 million planned community of more than a dozen 3-D printed homes in Rancho Mirage, CA. The community has a waiting list of more than 1,000. The same month, Icon announced it had teamed up with the developer 3Strands <https://www.3strands.com/> and DEN Property Group <http://www.denpg.com/> on four 3-D printed homes in Austin, TX priced at $450,000 to $795,000. Icon has also printed homes in the Community First Village <https://mlf.org/community-first/> in Austin, a project of the nonprofit organization Mobile Loaves & Fishes that provides permanent housing to homeless men and women.

"Nearly any object can be printed in 3-D; in construction, process uses concrete, foam and polymers to produce full-scale buildings.

https://www.nytimes.com/2021/09/28/business/3D-printing-homes.html _____________________________ Anita D. McClellan

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