Students make a concrete printer

Finally a concrete printer where some tech is actually available to look at.  I have been interested in this stuff for 4 years, but most of it is proprietary and “secret”.  Looks like this still has a ways to go (notice in the video the students constantly clearing jams).  But its a start.

http://3dprintingindustry.com/2015/07/30/3d-printed-guitarmaker-leads-students-in-building-mobile-concrete-3d-printer/