Contour Crafting / Printing Houses

Hello everyone, I am a student of the last year of construction engineering and I am looking for more information on printing concrete walls, masonry structures, how to design concrete mixes used for printing, and how to conduct technological tests and measurements of concrete parameters. What should such a printer consist of and how should a concrete mixture be fed? What should the dimensions of molds for concrete testing with this type of research work be? Does anyone have knowledge that he would share with me on the above topics? Thank you in advance for every comment. ;)