박테리아로 50만불 짜리 3D 프린팅 건물 짓기 프로젝트 $500,000 3D PRINTED CONSTRUCTION PROJECT PLANS TO USE BACTERIA FOR BUILDING
$500,000 3D PRINTED CONSTRUCTION PROJECT PLANS TO USE BACTERIA FOR BUILDING
In April 2018, assistant professor Michelle Bernhardt-Barry at the University of Arkansas was awarded a National Science Foundation research grant of $500,000 to support the development of 3D printed construction materials.
Two months on, and further information about the 5 year project has been revealed, showing that it aims to use an usual method of binding natural materials like soil and sand.
Michelle Bernhardt-Barry, assistant professor of civil engineering at the University of Arkansas. Photo via University of Arkansas
박테리아로 50만불 짜리 3D 프린팅 건물 짓기 프로젝트
2018년 4월 미 아칸소대의 조교수인 미쉘 베르하르트 베리는
3D 프린팅 건설재료 개발에 기여한 보상으로 국립과학재단으로부터 50만불을 지원받았다.
그녀가 개발한 재료란 토사 같은 자연재료와 혼합해 일반적 방법을 사용하는 것이
주요 목적임을 보여주는 연구결과가 개발자금을 지원받은 지 2개월 후 5년동안의 공개됐다.
석고와 모래
그녀는 석고로 벽돌를 만들 수 있는 바인더제트 3D 프린팅기술을 가지고 연구해왔다.
석고가 일반적 회반죽 성분임에도 불구하고 방수가 되지 않았다.
그래서 배리는 모래와 작업이 가능한 3D 프린터(ExOne 3D 와 Voxeljet.) 를 가지고
추가적 연구를 시작했다.
박테리아로 3D프린팅 건물만들기
아칸소대에서 실험하는 방법 중 하나는 미생물학적으로 유도된 탄산 칼슘 침전(MICP)으로
알려진 생물 역학적 과정이다.
탄산 칼슘은 퇴적 바위에서 자연적으로 발견되며 진주, 달팽이 껍질, 계란 등이 주요 성분이다.
그것은 토양에 특정한 종류의 박테리아를 흡수하여 MICP과정에서 생산된다.
베르나르트 베리의 팀은 이 과정의 구체적인 사항들을 완전히 파악하므로써 달팽이 껍질 알과
석회암의 주요 구조 성분인 탄산 칼슘으로 3D프린터 재료 바인더를 만들기를 기대하고 있다
황기철 콘페이퍼 에디터 큐레이터
Ki Chul Hwang, conpaper editor, curator
Gypsum and sand
As a proof of concept, Bernhardt-Barry has been working with binder jet 3D printing technology capable of making bricks from gypsum. Though gypsum is a common ingredient of plaster, these bricks are not waterproof, and so Bernhardt-Barry is planning to further her research with a 3D printer capable of working with sand. Such industrial 3D printers include equipment from ExOne 3D printers and machines from Voxeljet.
In each of these processes a proprietary binder is used to fuse gypsum or sand grains together to produce a 3D printed part. An alternate direction that Bernhardt-Barry would like to explore is the ability to use bacteria in place of a binder.
Buildings 3D printed from bacteria
One of the methods in experimentation at Arkansas is a bio-geochemical process known as microbiologically induced calcium carbonate precipitation (MICP).
Calcium carbonate is naturally found in sedimentary rocks, and is the main component of pearls, snail shells and eggs. It is produced in the MICP process by introducing certain types of bacteria to soil.
By mastering the specifics of this process, Bernhardt-Barry’s team will hopefully apply calcium carbonate as a soil-binder, and replicate its natural strength.
Bernhardt-Barry’s team at the University of Arkansas hope to create a 3D printer material binder from calcium carbonate, the main structural ingredient of snail shells eggs and limestone. Photo via Pixabay
The team is also exploring a material extrusion technique for the gypsum mixture, similar to the way cement is 3D printed.
By 2023, the team at Arkansas will complete a lifecycle analysis of its material with the hope of finding a commercial partner.
For research updates and more 3D printing news subscribe to the 3D Printing Industry newsletter, like us on Facebook and follow us on Twitter.
Got your own ideas for innovation? Apply them to a new role with 3D Printing Jobs here.
Featured image shows a 3D printed gypsum brick. Photo via Talk Business/ University of Arkansas
kcontents
