Scientists have come up with an alternative cement recipe that makes use of unused mining materials to cut its carbon emissions by up to two thirds, while meeting the performance requirements of traditional Portland cement.
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Harald Rupp
Ordinarily, if you want to make a 3D-printed liquid-filled object, you have to inject the liquid after the object has been printed. A new process, however, allows such items to be printed all in one step – and the technology could have some valuable applications.
The technique was developed by a team at Germany s Martin Luther University Halle-Wittenberg, led by Prof. Wolfgang Binder and researcher Harald Rupp. It utilizes a unique system that incorporates two 3D printing heads – one builds objects up by extruding successive layers of molten polymer, while the other (an inkjet print head) deposits tiny droplets of liquid.