3D printing building

Just looking at something else came across this revolution in Architecture - the kind of concreate you can use to do 3D printing of buildings. 

I Would like to look at the paper - how do they handle reinforcement bars ( aka rebars ) ? Could this handle agrigate ?  I've seen glass fiber in concreate with might be a rebar replacement. 




Makes you wonder if you can pre-print building as a base on Mars. 

This is a good example of the printer


There is a great deal of nivity about building - for example you don't generally have space around a site to put the printer frame down but does show a solution to the re-bar problem. Plus a good NASA base example! Architects look out! 

MIT are way ahread.  http://web.media.mit.edu/~neri/site/