I cut and pasted for you I hope. First of all, rebars needs to be tied after a certain heights. 2, It doesn't tell you how long it takes. I'm guessing moving the apis cor/3D printer using a crane takes time. There is also the setup time needed for each location. 3, Apis cor might have the right mix/IP on the concrete additive, So a cross IP trade on the HX with the DST might still be a possibility. Finally, we don't know how long it takes for the concrete to dry without adding the next course. Walls might also slag and would require rendering to smooth it out.
https://www.youtube.com/watch?v=gVRkjNSIiFk&feature=youtu.beRobotic construction company Apis Cor has used its technology to build the world's largest 3D-printed building, a two-storey office in Dubai.
Measuring 9.5 metres high with a floor area of 640 square metres, Apis Cor built the structure for the Dubai Municipality. The company claims it is the largest 3D-printed building ever built.
Apis Cor built the office with a robotic printer
Apis Cor developed a gypsum-based material to run through the printer, which was sourced for a local producer.
The printing took place out in the open, to prove that the technology could handle a harsh environment without humidity and temperature control.
The machine was moved around the building site with a crane
Apis Cor's 3D-printing machine was moved about the site using a crane to re-position it so it could build different parts of the building.
The building sits on conventional foundations, and the 3D-printed formwork for the columns was reinforced with concrete and rebar.
Only one machine was needed for the whole build
Pre-cast slabs were used for the floors, and conventional windows and roofs were added by a contractor once the walls were printed.
"The project gave us unique knowledge and invaluable experience that will help us improve our technology and develop a new version of our 3D printer," said Nikita Cheniuntai, CEO and founder of Apis Co.
"This project is a huge step forward in the concrete 3D printing industry."
Rebar was used to reinforce the 3D-printed formwork
In 2020, Apis Cor has plans to use its 3D-printing machine to build affordable housing in the US states of Florida, Louisiana and California.
The company has also set its sights a bit further away than planet earth, designing a habitat for Mars for a NASA competition.
The finished building has 640 square metres of floor space
3D-printed buildings can be quick to build and low cost. A group of architects in America have used mud to create prototype 3D-printed earth structures, and Italian 3D-printing technology developer WASP is working on a 3D printing machine that can build houses from soil and and agricultural waste.
The designer Yves Behar is working on what could be the world's first 3D-printed community, a neighbourhood of homes for low income workers in Latin America.
Earlier this year the world's longest 3D-printed bridge opened to pedestrians in Shanghai.
Images courtesy of Apis Cor.
