Printing Concrete

3D printing concrete (or contour crafting) is a favourite subject here at TD Towers and I have written about it a few time (here, here and here)

As always, progress keeps happening.

Skanska and Loughborough University have teamed up with Norman Foster and Partners to bring 3D concrete printing to practical fruition.

The printer deposits a high–performance concrete precisely under computer control. It works by laying down successive layers of concrete until the entire object is created. The printer can make things which cannot be manufactured by conventional processes such as complex structural components, curved cladding panels and architectural features.

The aim of the initial 18-month development programme is to develop the world’s first commercial concrete printing robot. Working with Skanska are a number of influential collaborators including Foster + Partners, Buchan Concrete, ABB and Lafarge Tarmac. As a result of this programme, Skanska aims to explore opportunities opened up by the new technology and help develop a 3D printing supply chain.

Although none of these partners are talking about using 3D concrete printing for military applications the benefits would be many. Their main objective is to use the technology to create shapes that cannot be created by normal processes but in an expeditionary context, the main objectives would be speed and resource economy, including personnel

Some of the proposed applications are literally out of this world.

Could astronauts one day be printing rather than building a base on the Moon? In 2013 ESA, working with industrial partners, proved that 3D printing using lunar material was feasible in principle. Since then, work continues to investigate the technique. The shielding against radiation provided by a 3D-printed block of simulated lunar regolith was measured, providing important inputs for next-stage designs… Soon the Agency is due to investigate another lunar 3D printing method, harnessing concentrated sunlight to melt regolith rather than using a binding liquid.

But how might lunar 3D printing one day be used in practice? Foster+Partners, contributing architectural concepts for the original study, put together this outline of a hypothetical mission to 3D-print an entire a lunar base, illustrating the design factors that steered them in their work. The rim of Shackleton Crater at the lunar south pole was chosen for the base location. The Moon’s rotation is such that the Sun only grazes its poles at low angles. The result is a near-constant ‘peak of eternal light’ along the rim of Shackleton Crater, beside regions of permanent shadow. Building in the vicinity of such a site would offer plentiful solar power, and relief from the extremes of heat and cold found across the rest of the Moon.

In reality any lunar base remains firmly on the drawing board, but each small step forward in research makes future lunar colonisation a little more feasible. In October 2014 more than 350 experts came together for a two-day Additive Manufacturing for Space Applications workshop at ESA’s ESTEC technical centre in Noordwijk, the Netherlands. They discussed the potential of 3D printing – also known as Additive Manufacturing – to transform the way the space industry operates and begin preparing common standards for its use.

The European Space Agency has also been working with Norman Foster and Partners, and in this case, an Italian company called D-Shape

Read more here

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