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Building a Lunar Base with 3-D Printing

By R&D Editors | February 4, 2013

Building a Lunar Base with 3-D Printing

Multi-dome lunar base being constructed, based on the 3-D printing concept
Multi-dome lunar base being constructed, based on the 3-D printing concept. Once assembled, the inflated domes are covered with a layer of 3-D-printed lunar regolith by robots to help protect the occupants against space radiation and micrometeoroids. Courtesy of Foster + Partners

Setting up a lunar base could be made much simpler by using a 3-D printer to build it from local materials. Industrial partners including renowned architects Foster + Partners have joined with ESA to test the feasibility of 3-D printing using lunar soil.

“Terrestrial 3-D printing technology has produced entire structures,” said Laurent Pambaguian, heading the project for ESA.

“Our industrial team investigated if it could similarly be employed to build a lunar habitat.”

Foster + Partners devised a weight-bearing ‘catenary’ dome design with a cellular structured wall to shield against micrometeoroids and space radiation, incorporating a pressurized inflatable to shelter astronauts.

A hollow closed-cell structure — reminiscent of bird bones — provides a good combination of strength and weight.

The base’s design was guided in turn by the properties of 3-D-printed lunar soil, with a 1.5 ton building block produced as a demonstration.

“3-D printing offers a potential means of facilitating lunar settlement with reduced logistics from Earth,” added Scott Hovland of ESA’s human spaceflight team.

“The new possibilities this work opens up can then be considered by international space agencies as part of the current development of a common exploration strategy.”

“As a practice, we are used to designing for extreme climates on Earth and exploiting the environmental benefits of using local, sustainable materials,” remarked Xavier De Kestelier of Foster + Partners Specialist Modelling Group. “Our lunar habitation follows a similar logic.”

The UK’s Monolite supplied the D-Shape printer, with a mobile printing array of nozzles on a six-meter frame to spray a binding solution onto a sand-like building material.

3-D ‘printouts’ are built up layer by layer — the company more typically uses its printer to create sculptures and is working on artificial coral reefs to help preserve beaches from energetic sea waves.

“First, we needed to mix the simulated lunar material with magnesium oxide. This turns it into ‘paper’ we can print with,” explained Monolite founder Enrico Dini.

“Then for our structural ‘ink’ we apply a binding salt which converts material to a stone-like solid.

“Our current printer builds at a rate of around two meters per hour, while our next-generation design should attain 3.5 meters per hour, completing an entire building in a week.”

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