"...polybricks are made of ceramic and look like cinder blocks, but fit together with others of their kind perfectly, without any need for mortar but just as safe.
The designers have studied wood joinery techniques and have developed a new tapered dovetail where the direction and severity of the tapering depends on the local geometric orientation of each component.
Long story short, the force of gravity locks adjacent components together because the slope of the surface is generated in such a way that the narrow end of the tapering is always near the lower face of the surface."
https://news.softpedia.com/news/3D-Printed-Interlocking-Bricks-Need-No-Mortar-to-Stay-Together-447713.shtml
The designers have studied wood joinery techniques and have developed a new tapered dovetail where the direction and severity of the tapering depends on the local geometric orientation of each component.
Long story short, the force of gravity locks adjacent components together because the slope of the surface is generated in such a way that the narrow end of the tapering is always near the lower face of the surface."
https://news.softpedia.com/news/3D-Printed-Interlocking-Bricks-Need-No-Mortar-to-Stay-Together-447713.shtml