> they are not doing anything different that what has been known for a long time in long-fiber composites They are using a new material (concrete) and in-situ

> they are not doing anything different that what has been known for a long time in long-fiber composites They are using a new material (concrete) and in-situ fabrication technique (extrusion/printing) that is at an early stage of development and doesn't seem to be performing well. I'm assuming that the type of empirical data produced by these experiments is a prerequisite to developing a finite element model for these materials/techniques. The worst case here is that civil engineers have to reinvent the knowledge that you believe other engineering disciplines have mastered using different materials. Computer guided in-situ reinforced concrete seems quite novel to me; perhaps that is a reflection of my own knowledge gap.